FYI - A-1 Miller's Performance Enterprises is a legal, legitimate, tax paying and reputable business. And as of 2024, A-1 Miller's Performance Enterprises is still in business and offering all parts and services listed in this website. Please click here to contact A-1 Miller's Performance Enterprises to place an order, send your parts for repairing, if you need a part or parts, or service(s) performed that's not listed or mentioned in this website, and/or for FREE professional and honest technical customer service assistance and support and payment options.

A-1 Miller's Performance Enterprises Catalog of Small Engine Parts, Lawn & Garden Engines, Competition Garden Tractor Pulling Engines, Header Pipe Kits, Rebuild and Repair Services

Website updated 7/24/22. Prices are subject to change without notice. FYI - All aftermarket parts that is offered in this website are of very high quality and come with an unconditional guarantee. As a matter of fact, the aftermarket parts are just as good or better quality than most OEM Kohler parts.

Governor Bushings, Cross Shafts, Governor Gears, Stub Shafts and Thrust Washers | Governor Springs, Throttle/Governor and Choke Linkages, Throttle Cable Clamps, Throttle Cable Assemblies | Carburetor Throttle Cable Bracket Kit | Remote Stranded Wire Cable-Operated Spring-Return Foot/Gas Pedal Throttle Control Setup Kits | High Quality Universal Foot/Gas Pedal Kit

Internal Engine Rebuild Parts (Gaskets, Oil Seals, Pistons and Ring Sets, Connecting Rods, Rod Bearing Inserts, Main Bearings, Valve Seat Cutter Tool Kits, OEM Stock Size Valves, Oversize Valves, Valve Spring Sets, Valve Guides, OEM Kohler Cylinder Heads, etc,)

OEM Stock Camshafts | 4,000 RPM Reground Torque Cam | Open RPM Performance Camshaft

Magnetic Oil Drain Plugs, Oil Filter Adapter Kit, Oil Filters and OEM Kohler Cast Aluminum and Cast Iron Oil Pans

Solid Motor Mount Kit for Cub Cadet AQS "Quiet Line" Garden Tractors

Professional Small Engine Repairs, Rebuilds and Custom Engine Build-up Services for General Lawn & Garden Equipment, Go-Karts, King Midget, Older All Terrain Vehicles, Older Snowmobiles, Antique/Vintage, Industrial/Commercial, 2, 3 and 4 Cylinder Diesel Lawn & Garden Engines, etc. | Rebuilt and Custom-Built Kohler Lawn & Garden Engines For Sale | NEW LOWER PRICES! Only High Quality, Long Lasting Parts Installed!

Professional Kohler Competition Pulling Engine Building and Freshening Service | Professionally Custom Built Kohler Pulling Engines For Sale | NOTE: Engines are rebuilt according to the customer's pulling association/club sanctioning rules and requirements, or custom built to the customer's preference. NEW LOWER PRICES! Only High Quality, Long Lasting Parts Installed!

Exhaust Header Pipes, Flanges and Complete Bolt-On Header Kits
Machine Shop Fabricating and Repair Services

A-1 Miller's Professional Valve Seat and Guide Repair Service for Kohler Engine Model K361 Cylinder Head

NEW! A-1 Miller's Professional Automotive Engine Rebuilding and Modification Services

NEW! A-1 Miller's Professional Automotive Engine Rebuilding and Modification Services. And Build You a Competitive Mini Pulling Truck and Big Wheel Mini Rod Pulling Tractor. Chevrolet, GMC, Chrysler, Ford, Diesel engines, etc. More details and information coming later.


Governor Components - Please contact A-1 Miller's if you're interested in purchasing any of the products or services listed in this website. If you need a part or parts that's not listed in this website, please contact A-1 Miller's and we'll see if we can get it at a reasonable price. | [Top of Page] (Prices are subject to change without notice.)
Kohler Governor Cross Shaft Bushings with Oil Seal to Prevent Leaking Oil. Rubber lip seal or rubber O-ring fits snug in bushing and on shaft, and have no effect with movement of governor leverage whatsoever. WHY HAVING AN OIL SEAL INSTALLED IS IMPORTANT: On single cylinder Kohler engines, vacuum within the crankcase created by the upward stroke of the piston draws in a small amount of outside air, along with a small amount of dust, dirt and debris, through the governor bushing and shaft, then pressure within the crankcase created by the downward stroke of the piston blows out a fine mist of crankcase oil through the bushing and shaft. Overtime, the dust, dirt and debris of this repeated pulsating action will, without a doubt, cause the bushing (and sometimes the shaft, too) to wear, which creates a thin film oily mess on the outside of the engine block. IMPORTANT INFORMATION UPON REMOVAL OF THE BUSHING: When removing the old bushing, use caution to prevent the governor cross shaft from pulling outward and possibly drop down inside the crankcase! If this happens, entire disassembly of the engine will be required to reinstall governor cross shaft. And before installing any new oil seal, always apply clean oil or grease inside the seal and/or on the shaft to keep the rubber lubricated. With no prior lubrication, the dry rubber will wear away from friction, eventually causing another oil leak. Do the job right the first time, and it won't have to be done again for a long time. A proven, ingenious and innovative concept by Brian Miller. Please do not accept advertised copycat products of this kind. (But I do appreciate them acknowledging my ingenuity and intelligence.)
Governor Cross Shaft Bushings with 7/32" hole x 1/2-13 UNC threads. Each fits various Kohler engine models K90/K91, K141, K160/K161, L160/L161, L181, K181 and various early M8 engines with V-shape/coiled governor spring. NOTE: When ordering, please specify engine model, specification and serial numbers, or identification of your bushing. Discontinued Kohler part #'s 220132 and 230476-S.
  • Install new snug-fitting neoprene rubber O-ring oil seal in YOUR governor cross shaft bushing. $5.00 for O-ring and labor, plus return shipping & handling.
  • Repair worn hole in YOUR governor cross shaft bushing with a thin-wall brass sleeve bushing and install new snug-fitting neoprene rubber O-ring seal. $15.00 each for all parts and labor, plus shipping & handling.
  • OUR used and in excellent condition governor cross shaft bushing with new snug-fitting rubber O-ring oil seal installed. $20.00 each, plus shipping & handling. (When available.)


Governor Cross Shaft Bushing with 7/32" hole x 1/2-13 UNC threads. Fits Kohler engine model K181 w/specification # 301000-301045, and various later M8 engines with coiled extension governor spring. NOTE: When ordering, please specify engine model and specification numbers. OEM Kohler part # 41 158 02-S.
  • Install new snug-fitting neoprene rubber O-ring oil seal in YOUR governor cross shaft bushing. $5.00 for O-ring and labor, plus return shipping & handling.
  • Repair worn hole in YOUR governor cross shaft bushing with a thin-wall brass sleeve bushing and install new snug-fitting neoprene rubber O-ring seal. $15.00 each for all parts and labor, plus shipping & handling.
  • New governor cross shaft bushing with new snug-fitting rubber O-ring oil seal installed. $12.50 each, plus shipping & handling.
  • New governor cross shaft bushing only. OEM Kohler part # 41 158 02-S. $9.45 each, plus shipping & handling.


Governor Cross Shaft Bushing with 1/4" hole x 1/2-13 UNC threads. Fits all Kohler K-series and Magnum engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361. Discontinued Kohler part # 235476-S.
  • Install rubber lip oil seal or snug-fitting neoprene rubber O-ring in YOUR governor cross shaft bushing. $5.00 for seal and labor, plus return shipping & handling.
  • Repair worn hole in YOUR governor cross shaft bushing with a thin-wall brass sleeve bushing and install rubber lip oil seal or snug-fitting neoprene rubber O-ring. $15.00 each for all parts and labor, plus shipping & handling.
  • New rubber lip oil seal only (customer machines own bushing for installation of oil seal). $3.00 each, plus shipping & handling.
  • OUR used and in excellent condition governor cross shaft bushing with new rubber lip oil seal or snug-fitting neoprene rubber O-ring installed. $20.00 each, plus shipping & handling. (When available.)


7/32" x 1/4" Diameter Governor Cross Shafts. Fits Kohler engine models K141, K160/K161, K181, L160/L161, L181 and M8. 3-13/16" OEM overall length. IMPORTANT: Due to metal fatigue, the lever on this shaft may break off. When this happens, the engine will run at open RPM. So it'll be a good idea to weld the lever to the shaft. And the entire engine must be completely disassembled to replace this part. Also, before installing, apply oil or grease on shaft for smooth governor action and less wear to shaft and/or bushing. OEM Kohler part # 230540-S.

  • Used, in excellent condition and not welded. $35.00 each, plus shipping & handling. (When available.)
  • Used, in excellent condition and welded. $40.00 each, plus shipping & handling. (When available.)
  • New and not welded. Includes alignment washer (listed below). $76.40 each, plus shipping & handling.
  • New and welded. Includes alignment washer (listed below). $80.00 each, plus shipping & handling.


Alignment Washers and Spacer. Fits Governor Cross Shaft listed above. Fits most Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8. Goes on governor cross shaft listed above, and locates between governor cross shaft bushing (listed above) and step on cross shaft to maintain proper alignment of lever on shaft with center button on governor gear assembly.
  • Aftermarket Stainless Steel Washer. Dimensions: .223" I.D. x .435" O.D. x .034" thickness. Replaces Kohler part # X-25-58-S. $1.00 each, plus shipping & handling.
  • Steel Washer. OEM Kohler part # X-25-58-S. $2.85 each, plus shipping & handling.
  • Hardened Aluminum Spacer and Aftermarket Stainless Steel Washer. Fits various early K181 engines. Dimensions: .220" I.D. x .343" O.D. x 5/16" length. Replaces discontinued Kohler part # 232739. $6.00 each, plus shipping & handling.


1/4" Diameter Governor Cross Shafts. Fits all Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361. 3-13/16" OEM overall length. IMPORTANT: Due to metal fatigue, sometimes the lever on this shaft will break off. When this happens, the engine will run at wide open throttle. So it'll be a good idea to weld the lever to the shaft. And the entire engine must be completely disassembled to replace this part. Also, before installing, apply oil or grease on shaft for smooth governor action and less wear to shaft and/or bushing. Replaces discontinued Kohler part # 237455 (cross shaft with groove and C-clip instead of spacer listed below). OEM Kohler part # A-235256-S.

  • Used, in excellent condition and not welded. $20.00 each, plus shipping & handling. (When available.)
  • Used, in excellent condition and welded. $25.00 each, plus shipping & handling. (When available.)
  • New and not welded. Includes steel spacer (listed below). $41.00 each, plus shipping & handling.
  • New and welded. Includes steel spacer (listed below). $46.00 each, plus shipping & handling.


Alignment Spacers. Fits Governor Cross Shaft listed above. Fits all Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361. Goes on governor cross shaft listed above, and locates between governor cross shaft bushing (listed above) and lever to maintain proper alignment of lever with center button on governor gear assembly.
  • High quality aftermarket. Dimensions: .260" I.D. x .372" O.D. x 13/16" length. Replaces Kohler part # 25 112 17-S. $1.00 each, plus shipping & handling.
  • OEM Kohler part # 25 112 17-S. $7.15 each, plus shipping & handling.


Governor Cross Shaft End Bearing (Tiny Steel Bushing w/Blind Hole). Fits various Kohler engine models K181, L160/L161, L181, M8, K241, M10, K301, M12, K321, M14, K341 and M16 with machined through-hole in block for end of governor cross shaft. OEM Kohler part # 234866-S.
  • Used and in excellent condition. $4.00 each, plus shipping & handling. (When available.)
  • New. $6.60 each, plus shipping & handling.


Nylon Governor Gear Assemblies with Symmetrical Flyweights. Fits Kohler engine models K141, K160/K161, K181, L160/L161, L181, M8, K241, M10, K301, M12, K321, M14, K341, M16, K361, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. Designed for general lawn and garden work. Also suitable for a 4,000± RPM competition pulling engine. IMPORTANT: Apply oil or grease on stub shaft to prevent wear or damage to governor gear assembly upon engine startup until crankcase oil reach this area.

  • Used, unworn and in excellent condition. $35.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # A-235743-S. $62.65 each, plus shipping & handling.


Nylon Governor Gear Assembly with Asymmetrical (Offset) Flyweights. Designed specifically for Kohler engine models K241, M10, K301, M12, K321, M14, K341 and M16 used with an air compressor, generator and/or welding unit. Also ideal for use in a 4,000± RPM competition pulling engine. Recovers engine RPM quickly when under a load and maintains engine RPM at a more steady pace. IMPORTANT: Apply oil or grease on stub shaft to prevent wear or damage to governor gear assembly upon engine startup until crankcase oil reach this area.
  • OEM Kohler part # A-236294-S. $182.20 each, plus shipping & handling.


Cast Iron Governor Gear Assembly with Symmetrical Flyweights. Fits Kohler engine models K141, K160/K161, K181, L160/L161, L181, M8, K241, M10, K301, M12, K321, M14, K341, M16, KT17 (first design), KT17 Series II, KT19/KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. Recommended for high RPM or wide open throttle competition pulling engines. Will not become distorted or explode at high RPM or at open RPM like the nylon governor gears sometimes do. (Kohler never made a steel governor gear.) IMPORTANT: Apply oil or grease on stub shaft to prevent wear or damage to governor gear assembly upon engine startup until crankcase oil reach this area.
  • Used, unworn and in excellent condition. Discontinued Kohler part # A-237031-S. $75.00 each, plus shipping & handling. (When available. These are hard to find nowadays because not many were made.)


Thrust Washers for Governor Gear Assemblies. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16, K361, KT17, KT17 Series II, KT19, KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. A thrust washer is required to prevent the governor gear from wearing against the engine block when the governor gear is under full pressure from the engine running at higher RPM. Many people are not aware of the thrust washer because it may appear to be part of the engine block, and it usually falls out and gets lost while cleaning inside the block. IMPORTANT: Apply oil or grease on stub shaft to prevent wear or damage to governor gear assembly upon engine startup until crankcase oil reach this area.
  • Hardened Steel Thrust Washers. Recommended for and suitable with a nylon governor gear assembly. Much harder than a grade 8 flat washer. Dimensions: .032" thickness x .380" I.D. x .686" O.D.
    • High quality aftermarket. Hardened Steel Thrust Washer. Replaces Kohler part # 237022-S. $1.00 each, plus shipping & handling.
    • Hardened Steel Thrust Washer. OEM Kohler part # 237022-S. $5.90 each, plus shipping & handling.
  • Bronze Thrust Washers. Recommended for and suitable with a cast iron governor gear assembly. Porous (absorbs oil) and harder than cast iron. Dimensions: .063" thickness x .380" I.D. x .757" O.D.
    • High quality aftermarket. Bronze Thrust Washer. Replaces Kohler part # X-25-67-S. $1.00 each, plus shipping & handling.
    • Bronze Thrust Washer. OEM Kohler part # X-25-67-S. $3.55 each, plus shipping & handling.


Governor Gear Stub Shafts. Fits Kohler engine models K141, K160/K161, K181, L160/L161, L181 and M8. Dimensions of each part listed below: 3/8" diameter x .625" length. NOTE: Install stub shaft until .345" (11/32") protrudes from the block, and apply oil or grease on stub shaft to prevent wear or damage to governor gear assembly upon engine startup until crankcase oil reach this area. Click here to learn how to replace the worn governor gear stub shaft and reinstall the welch plug. [Return to previous section]

  • High quality aftermarket. Made of precision ground, hardened, heat-treated alloy steel. Fits snug (press fit) in engine block. Replaces Kohler part # 230125-S. $10.00 each, plus shipping & handling.
  • OEM Kohler part # 230125-S. $33.00 each, plus shipping & handling.


Governor Gear Stub Shafts. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16, K361, KT17, KT17 Series II, KT19, KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. Dimensions: 3/8" diameter x 7/8" length. NOTE: Install stub shaft until .345" (11/32") protrudes from the block, and apply oil or grease on stub shaft to prevent wear or damage to governor gear assembly upon engine startup until crankcase oil reach this area. Click here to learn how to replace the worn governor gear stub shaft and reinstall the welch plug.
  • High quality aftermarket. Made of precision ground, stainless steel material. Fits snug (press fit) in engine block. Replaces Kohler part # 235125-S. $10.00 each, plus shipping & handling.
  • OEM Kohler part # 235125-S. $69.10 each, plus shipping & handling.


1-1/8" Steel Welch Expansion Plugs. Fits Kohler engine models K141, K160/K161, K181, L160/L161, L181, M8, K241, M10, K301, M12, K321, M14, K341, M16 and K361. Replace damaged-beyond-repair or lost welch plug in block to access to governor gear stub shaft. Concave/dish-shape, not cup-shape. Flattens out and expands with medium size ball peen hammer when installed with clear RTV silicone adhesive sealant in counterbore. Click here to learn how to replace the worn governor gear stub shaft and reinstall the welch plug.

  • High quality aftermarket. Replaces Kohler part # X-230-11-S. $1.00 each, plus shipping & handling.
  • OEM Kohler part # X-230-11-S. $2.15 each, plus shipping & handling.


Governor Stop Pin. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16, K361, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. Replace damaged-beyond-repair or lost welch plug in block to access to governor gear stub shaft. Concave/dish-shape, not cup-shape. Expands and flattens out with medium size ball peen hammer when installed with clear RTV silicone adhesive sealant in counterbore. Click here to learn how to replace the worn governor gear stub shaft and reinstall the welch plug. Retains governor gear assembly on stub shaft. Replace worn or damaged governor stop pin.

  • Used and in excellent condition. $3.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 231355-S. $6.05 each, plus shipping & handling.

Governor Springs, Throttle Link Bushings, Throttle/Governor Linkages, Throttle Cable Clamps, Throttle Cable Assemblies and Governor Gear Assemblies and Related Parts - Please contact A-1 Miller's if you're interested in purchasing any of the products or services listed in this website. If you need a part or parts that's not listed in this website, please contact A-1 Miller's and we'll see if we can get it at a reasonable price. | [Top of Page] (Prices are subject to change without notice.)
Throttle Stabilizer/Anti-Surge Springs. Install either of these lightweight springs connect between the governor lever and throttle lever to remove free play (looseness) in the linkage end connections to reduce erratic engine behavior at top governed speed due to throttle flutter for a smoother running engine and reduce wear to throttle shaft. Can be used on virtually any Briggs & Stratton, Kohler K-series, Magnum or Command single- or twin-cylinder cast iron or aluminum block engine. May need to drill a small hole with chamfered edges in either lever close to linkage connection to install spring. A must for a generator, welder or a 4,000 RPM± governed competition pulling engine. With a governed pulling engine, throttle flutter causes the engine RPM to momentarily spike, which will cause the rear tires to temporary lose traction (jerk), resulting in a possible shorter distance pull. A proven, ingenious and innovative concept by Brian Miller, because nobody else advertise this type of product for a governed pulling engine.
  • 2-7/16" overall length. High Quality Aftermarket Throttle Stabilizer/Anti-Surge Spring. $5.00 each, plus shipping & handling.
  • 2-1/8" overall length. OEM Kohler part # 230117-S. $11.10 each, plus shipping & handling.
  • 4-1/8" overall length. OEM Briggs & Stratton part #'s 260478, 690545. $9.00 each, plus shipping & handling.
  • V-Shaped/Coiled Governor Spring to regulate and maintain safe engine RPM. Has hook on each end. Fits various Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8 for general lawn and garden use or snow removal. OEM Kohler part # 232617-S. $8.95 each, plus shipping & handling.
  • V-Shaped/Coiled Governor Spring to regulate and maintain safe engine RPM. Has hook on each end. Designed specifically for Kohler engine model K181 with a generator, but will work on various Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8 for a quicker throttle response. OEM Kohler part # 232619-S. $19.55 each, plus shipping & handling.
  • V-Shaped/Coiled Governor Spring to regulate and maintain safe engine RPM. Has hook on one end and "Z" bend on other end. Fits various Kohler engine models K181 and M8. New Old Stock. Discontinued Kohler part # 41 091 02-S. $26.00 each, plus shipping & handling. (When available.) [Return to previous section]
Coiled Governor Spring to regulate and maintain safe engine RPM. Fits later Kohler engine model K181 with specification numbers 301000-301045, and various Kohler Magnum engine model M8 with specification numbers 301500-301651. Approximately 4-1/2" overall length. OEM Kohler part # 41 089 12-S. $7.65 each, plus shipping & handling. [Return to previous section]
26 Coil Governor Spring to regulate and maintain safe engine RPM. Fits most Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361. Used in Cub Cadet garden tractor models: 70, 71, 72, 73, 86, 100, 102, 104, 105, 106, 107, 108, 109, 122, 123, 124, 125, 126, 127, 128, 129, 149, 169, 1050, 1204, 1210 and 1211. This particular spring can also be used on various Kohler engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18 and M20. Because all these engines listed use the same governor gear assembly as the single cylinder engines, which is calibrated for this spring. 2-5/8" overall length. Go here to learn how to set the engine governor RPM speed on a single cylinder Kohler K-series or Magnum engine. Replaces discontinued Kohler part #'s 45 091 01-S, 52 091 04-S and 52 091 06-S (23 coil [2-7/16" length] governor spring). OEM Kohler part # 235496-S. $13.50 each, plus shipping & handling.
34 Coil Extended-Length Governor Spring to regulate and maintain safe engine RPM. Fits Kohler AQS "Quiet Line" engine models K241, K301, K321, K341 and K361, and certain Kohler Magnum engine models M10, M12, M14 and M16. Used on Cub Cadet garden tractor models: 680, 1000, 1200, 1210, 1250, 1282, 1450 and 1650; John Deere AQS "Quiet Line" models, and other makes and models of garden tractors or small engine equipment. Most common for general lawn and garden use or snow removal. 8" overall length. Go here to learn how to set the engine governor RPM speed on a single cylinder Kohler K-series or Magnum engine. OEM Kohler part # 47 091 01-S. $15.60 each, plus shipping & handling.
23 Coil Extended-Length Governor Spring to regulate and maintain safe engine RPM. Fits various Kohler KT-series and Magnum opposed twin cylinder engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18 and M20. 23/64" O.D. x 5" overall length. Used and in excellent condition. Hard to find part. Not distorted or stretched-out. Discontinued Kohler part # 52 091 05-S. $20.00 each, plus shipping & handling. (When available.)
New Style Nylon Throttle to Governor Lever Link Retaining Bushings listed below. Each fits Kohler engine models M8, K241, M10, K301, M12, K321, M14, K341, M16, K361, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20, MV20, CH11, CH12.5, CH13, CH14, CH15, CH16, CH18, CH20, CH22, CH25, CH410, CH430, CH450, CH5, CH620, CH621, CH640, CH641, CH670, CH680, CH730, CH735, CH740, CH745, CH750, CH940, CH960, CH980, CH1000, CV11, CV12.5, CV13, CV14, CV15, CV16, CV18, CV20, CV22, CV25, CV430, CV450, CV460, CV493, CV620, CV640, CV670, CV680, CV730, CV740, CV745, CV750, CV940, CV960, CV980, CV1000, ECV740, ECV749, ECV850, ECV860, ECV870, ECV880, ECV940, ECV980, ELH775, KS530, KS540, KS590, KS595, KT600, KT610, KT620, KT715, KT725, KT730, KT735, KT740, KT745, LH630, LH640, LH685, LH690, LH750, LH755, LH775, LV680, PCV850, PCV860, SV470, SV471, SV480, SV530, SV540, SV541, SV590, SV591, SV601, SV620, SV710, SV715, SV720, SV725, SV730, SV735, SV740, SV810, SV820, SV830, SV840, TH16, TH18, TH575, ZT710, ZT720, ZT730 and ZT740 with a Carter/Kohler #26, #28, #30 carburetor or Walbro WHG #52, #60, #64 carburetor with 3/16" hole in governor lever and throttle lever and without integrated ball on throttle lever.
  • Push-In Nylon Throttle Link Retaining Bushing. OEM Kohler part # 25 158 08-S. $4.50 each, plus shipping & handling.
  • Clamp-On Black Nylon Throttle Link Retaining Bushing. Identical to bushing listed below except for color. OEM Kohler part # 25 158 11-S. $4.65 each, plus shipping & handling.
  • Clamp-On Translucent Nylon Throttle Link Retaining Bushing. Identical to bushing listed above except for color. OEM Kohler part # 47 158 07-S. $5.05 each, plus shipping & handling.

NOTE: The tiny metal push-on self-locking retaining clip/ring (part # 25 141 03-S) shown to the right for the .080" diameter throttle link is no longer available from Kohler. Use either of the nylon bushings listed above as a perfect replacement.

FYI - Piano or music wire, which is very hard solid steel wire, can be used to replace most obsolete OEM throttle/governor links for various small engines. Usually .080" (5/64" or 2mm) is the most common size. A torch will be needed to make any bends and the "Z" bend at each end. Actually, this type of wire can be used for a lot of different things. Just because it's called "piano or music wire", don't mean it's for pianos or musical instruments only. Piano or music wire is available online and at most Ace Hardware stores.
Throttle to Governor Lever Link. Fits Kohler engine models K90/K91 with a 3/32" hole in governor lever and throttle lever. Connects throttle lever to governor lever. Dimensions: .080" diameter x 1-5/8" overall length. OEM Kohler part # 220380-S. $15.60 each, plus shipping & handling.
Throttle Link. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181, and certain Kohler Magnum M8 with a 3/32" hole in governor lever and throttle lever. Connects throttle lever to governor lever. Dimensions: .080" diameter x 2-1/2" overall length. OEM Kohler part # 230078-S. $15.70 each, plus shipping & handling.
New Style Throttle to Governor Lever Link. Fits Kohler Magnum engine model M8 with a 3/16" hole in governor lever and throttle lever. Connects throttle lever to governor lever. Requires new style nylon throttle link retaining bushings listed above. Dimensions: .080" diameter x 2-1/2" length. OEM Kohler part # 25 079 01-S. $18.55 each, plus shipping & handling.
New Style Throttle to Governor Lever Link. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16, K361 with Carter/Kohler or Walbro carburetors with a 3/16" hole in governor lever and without ball integrated with throttle lever. Connects throttle lever to governor lever. Requires new style nylon throttle link retaining bushings listed above. Dimensions: .080" diameter x 3" length. OEM Kohler part # 47 079 11-S. $10.20 each, plus shipping & handling.
Choke Link. Fits Kohler AQS "Quiet Line" engine models K241, K301, K321, K341 and K361. Used on Cub Cadet garden tractor models 800, 100, 1200, 1250, 1450 and 1650, including certain John Deere garden tractors. Connects [the extended length] choke lever to lever (bell crank) on flywheel shroud. OEM Kohler part # 47 079 01-S. $10.15 each, plus shipping & handling.
Old Style Throttle to Governor Lever Link. Fits Kohler engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18 and M20 with .080" hole in throttle lever and governor lever. Connects throttle lever to governor lever. Does NOT require new style nylon throttle link retaining bushings listed above. Originally used on the KT17, KT17 Series II, KT19, KT19 Series II and KT21 engines. 4-1/2" length on inside bends. Made of heat-treated, hardened steel. A-1 Miller's fabricated part; Replaces discontinued Kohler part # 52 354 02-S. $15.00 each, plus shipping & handling.
New Style Throttle Link. Fits Kohler engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18 and M20 with 3/16" hole in governor lever and throttle lever. Connects throttle lever to governor lever. Requires new style nylon throttle link retaining bushings listed above. Originally installed on the M18 and M20 engines. 4-1/2" length. OEM Kohler part # 52 079 11-S. $17.35 each, plus shipping & handling.
3/16" Throttle to Governor Lever Link Rod. Fits Kohler engine models K241, K301, K330/K331, K321, K341 and K361. Connects throttle lever to governor lever.
  • High quality aftermarket. Replaces Kohler part # 235277-S. $10.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 235277-S. $24.45 each, plus shipping & handling.
3/16" Throttle to Governor Lever Ball Joint w/Integrated Ball/Threaded Stud. Fits Kohler engine models K241, K301, K330/K331, K321, K341 and K361 with early style throttle link/rod. 10-32 UNF male and female threads. Fits Carter/Kohler #26, #28, #30 and Walbro WHG #52, #60, #64 carburetors without ball integrated with throttle lever. Connects throttle lever to governor lever. Can also be used on the carburetor of mini rods, hot rods, race cars, etc. 10-32 UNF male and female threads. NOTE: Apply motor oil inside ball joint to reduce wear and for smoother throttle operation.
  • High quality aftermarket. Replaces Kohler part # 237130-S. $5.00 each, plus shipping & handling.
  • OEM Kohler part # 237130-S. $19.05 each, plus shipping & handling.
Quick Disconnect Throttle to Governor Lever Snap-On Ball Joint Body. Fits various Kohler engine models K241, K301, K321, K341, K361, K482, K532 and K582 after serial # 6373502 (1974 and newer). Commonly used on K-series AQS "Quiet Line" engines. Fits Carter/Kohler #26, #28, #30 and Walbro WHG #52, #60, #64 carburetors with ball on throttle lever. Connects throttle lever to governor lever. Can also be used on the carburetor of mini rods, hot rods, race cars, etc. 10-32 UNF female threads and accepts 1/4" diameter ball. NOTE: Apply motor oil inside ball joint body to reduce wear and for smoother throttle operation. High quality aftermarket. Replaces discontinued Kohler part # 45 208 03-S. $8.50 each, plus shipping & handling.
Throttle Lever Ball w/Threaded Stud for Quick Disconnect/Snap-On Ball Joint Body listed above used on Kohler engine models K241, K301, K321, K341, K361, K482, K532 and K582 . Fits Carter or Kohler #26, #28, #30 and Walbro WHG #52, #60, #64 carburetors with 3/16" hole in throttle lever. Includes nut and lock washer. Can also be used on the carburetor of mini rods, hot rods, race cars, etc. NOTE: Apply motor oil inside ball joint to reduce wear and for smoother throttle operation. High quality aftermarket. Dimensions: 1/4" diameter ball x 10-32 UNF threads. (Same size as OEM ball/stud on Carter, Kohler and Walbro carburetors.) Replaces discontinued Kohler part # 48 194 01-S. Replaced with Kohler part # 237130-S (ball joint w/integrated ball/stud). $4.50 each, plus shipping & handling.
Quick Disconnect/Snap-On Throttle Ball Joint Assembly for Carter/Kohler or Walbro carburetor used on Kohler engine models K241, K301, K321, K341 and K361 with 3/16" hole in throttle lever. 10-32 UNF male and female threads. Fits Carter or Kohler #26, #28, #30 and Walbro WHG #52, #60, #64 carburetors without ball integrated with throttle lever. Connects throttle lever to governor lever. Can also be used on the carburetor of mini rods, hot rods, race cars, etc. NOTE: Apply motor oil inside ball joint body to reduce wear and for smoother throttle operation. High quality aftermarket. Replaces Kohler part # 45 208 03-S (discontinued; snap-on ball joint body) and 48 194 01-S (ball stud). $13.00 per assembly, plus shipping & handling.
Quick Disconnect Throttle to Governor Lever Rod (Link) with Snap-On Ball Joint and E-Clip Assembly. Fits Kohler engine models K241, K301, K321, K341 and K361. Commonly used on K-series AQS "Quiet Line" engines. Connects throttle lever to governor lever. Assembled with Kohler part #'s 235277-S (rod), X-70-3 (nut), discontinued 45 208 03-S (snap-on ball joint body) and 235278-S (E-clip). High quality aftermarket. $20.00 per assembly, plus shipping & handling.
Governor Link Clip and Retainer. Each fits early style 3/16" throttle link rod (above) used on Kohler engine models K241, K301, K330/K331, K321, K341 and K361.
  • Clamp-On Throttle Link Clip. Irrelevant Kohler part number. Replaces Kohler part # 235278-S. $3.50 each, plus shipping & handling.
  • E-Clip Retainer. OEM Kohler part # 235278-S. $4.95 each, plus shipping & handling. (Not available in aftermarket.)
Quick Disconnect/Snap-On Ball Joint Throttle to Governor Lever Link Assembly. Fits Kohler engine models K482, K532 and K582 after serial # 6373502 (1974 and newer). Connects throttle lever to governor lever on carburetor. Assembled with Kohler part #'s 45 208 03-S (discontinued; two snap-on ball joint bodies) and 271151-S (double threaded rod). $26.25 per assembly, plus shipping & handling.
Snap-On Throttle/Choke Cable Clip (Clamp). Use to secure throttle or choke cable conduit to extended OEM Kohler angled bracket on engine block of various Kohler engine models K141, K160/K161, K181, K241, K301, K321, K341, M10, M12, M14, M16, K482, K532 and K582. OEM Kohler part # 235603-S. $5.65 each, plus shipping & handling.
Dual Conduit Throttle/Choke Cable Clamps. Either can be used with one or two cables. Can be used instead of clamp listed above to secure 3/16" or 7/32" diameter cable conduit(s) to throttle or choke bracket on engine block, or to carburetor side of flywheel shroud with drilled hole and nut tack-welded to inside of shroud. Each made of heavy gauge zinc-plated steel.
  • High quality aftermarket clamp only. Requires 3/16" threaded or sheet metal mounting screw. Replaces Briggs & Stratton part #'s 22372 and 692179. $1.50 each, plus shipping & handling.
  • High quality aftermarket clamp with 3/16" screw, nut and split lock washer. Nut or head of screw can be tack-welded through drilled hole inside flywheel shroud for easy mounting of clamp. Clamp replaces Briggs & Stratton part #'s 22372 and 692179. $2.00 each, plus shipping & handling.
Loop-Type Cable/Wire/Hose Clamps. Use to secure throttle or choke cables, or for safe routing of electrical wire(s), battery cable, small remote fuel primer hose or bundle of wires along frame. Each listed below requires 3/16" mounting screw.
  • 3/16" Loop Size. A-1 Miller's part # 03-249. $1.00 each, plus shipping & handling.
  • 7/32" Loop Size. A-1 Miller's part # 03-2701. $1.00 each, plus shipping & handling.
  • Dual 7/32" Loop Size. Originally used for securing Kohler alternator wires to bearing plate. OEM Kohler part # X-728-1-S. $1.38 each, plus shipping & handling.

Throttle and Choke Cable Assemblies, and High Quality Universal Foot/Gas Pedal Kit - Please contact A-1 Miller's if you're interested in purchasing any of the products or services listed in this website. If you need a part or parts that's not listed in this website, please contact A-1 Miller's and we'll see if we can get it at a reasonable price. | [Top of Page] (Prices are subject to change without notice.)
Universal-Fit Replacement Choke or Throttle Control T-Handle. Replace damaged or missing OEM ball-shape knob or T-handle for more comfortable operation of in-dash or panel-mounted choke or throttle cable control lever. Made of tough, durable plastic. Push-on or use small hammer to install. $1.50 each, plus shipping & handling.
Lever-Action Solid Wire Remote Throttle Control Cable Assemblies. Side mount. Fits Cub Cadet garden tractor models 70, 71, 72, 73, 100, 102, 104, 122, 123, 124, 125, 126, 127 and 147.
  • High quality aftermarket. All heavy duty metal construction. Very close to OEM. Inner wire length: 41-1/4"; Conduit length: 36-1/2"; Wire travel: 1-3/4".Our part # 8626. $29.00 each, plus shipping & handling.
  • OEM Cub Cadet part # IH-384883-R93. $51.00 each, plus shipping & handling.


Lever-Action Solid Wire Remote Throttle Control Cable Assemblies. Panel mount. Fits virtually all wide and spread frame Cub Cadet garden tractor models 86, 108, 109, 128, 129, 149, 169, 800, 1000, 1100, 1200, 1250, 1450 and 1650.

  • High quality aftermarket. All heavy duty metal construction. Very close to OEM. Inner wire length: 28-7/8"; Conduit length: 26-7/8"; Wire travel: 1-3/4". A-1 Miller's part # 227. $29.00 each, plus shipping & handling.
  • OEM Cub Cadet part # IH-126465-C2. $41.55 each, plus shipping & handling.


Throttle Control Cable Assembly. Panel mount. Fits Cub Cadet garden tractor models 582, 1050, 1204, 1210, 1211, 1282, 1710, 1712, 1806, 1810, 1811, 1812, 1872 and 2072. OEM Cub Cadet part # 746-3002. $44.20 each, plus shipping & handling.

Push/Pull Solid Wire Remote Choke Control Cable Assemblies. Fits all narrow frame Cub Cadet garden tractors.
  • High quality aftermarket. Durable plastic-coated metal conduit to resist rust. Very close to OEM. Inner wire length: 42-1/4"; Conduit length: 40-1/2"; Wire travel: 2". A-1 Miller's part # 72-1196. $20.00 each, plus shipping & handling.
  • OEM Cub Cadet part # IH-384884-R92. $44.00 each, plus shipping & handling.


Push/Pull Solid Wire Remote Choke Control Cable Assemblies. Fits all wide and spread frame Cub Cadet garden tractors.

  • High quality aftermarket. Durable plastic-coated metal conduit to resist rust. Very close to OEM. Inner wire length: 35"; Conduit length: 43"; Wire travel: 1-1/2". A-1 Miller's part # 10748. $20.00 each, plus shipping & handling.
  • OEM Cub Cadet part # 946-3011. $35.75 each, plus shipping & handling.


Choke Control Cable Assembly. Fits Cub Cadet garden tractor models 482, 682, 782, 784, 1710, 1711, 1712, 1806, 1810, 1811, 1812 and 2072. OEM Cub Cadet part # 746-3001. $47.55 each, plus shipping & handling.


Choke Cable Control Assembly. Fits Cub Cadet garden tractor models 580, 582, 1604 and 1606. Discontinued Cub Cadet part # 746-3004.

Throttle Wire/Cable Swivel Kits. Use to secure stranded cable or solid wire to speed regulating disc or speed control bracket/lever (each listed below) for go-karts, small motorized vehicles, stock/governed Kohler competition pulling engines or secure to throttle lever on Carter/Kohler carburetor for an open RPM Kohler competition pulling engine. Each kit requires a 15/64" / .230" / 6mm hole, and includes wire swivel, screw and friction washer.
  • High quality aftermarket. Replaces Kohler part # 48 755 10-S. $3.00 per kit, plus shipping & handling.
  • OEM Kohler part # 48 755 10-S. $13.53 per kit, plus shipping & handling.
Speed Control Bracket/Lever with 15/64" / 6mm hole for throttle swivel assembly (listed above). Commonly used on most Kohler engine models K241, K301, K321 and K341 with the round shape air cleaner assembly. New Old Stock or used and in excellent condition. Discontinued Kohler part # 235086-S. $4.75 each, plus shipping & handling.

Speed Control Bracket/Lever with yoke, for use with a grooved end speed-adjustment screw (discontinued Kohler part # 237574-S). Sets engine RPM at desired/fixed position. Used on various Kohler engine models K241, K301, K321 and K341 with the round shape air cleaner assembly connected to a generator/welder, water pump, etc. OEM Kohler part # 236413-S. $10.70 each, plus shipping & handling.

NOTE - A-1 Miller's have the capability to fabricate and duplicate obsolete and hard to find throttle linkages and levers. If interested, please email me a photo of the part(s) that's needed (if possible) with the exact dimensions.

Remote stranded wire cable-operated spring-return foot/gas pedal throttle control setup on a 4,000± RPM governed stock Kohler engine in a competition garden pulling tractor, go-kart, older small all terrain vehicle, etc. Fits Kohler engine models K90/K91, K141, K160/K161, K181, L160/L161, L181 and M8. Use with stranded wire throttle cable and foot pedal assembly. (Listed further below.) Can be used on go-karts, small motorized vehicles, stock/governed competition pulling tractors, etc. This setup will automatically return the throttle to the idle when pressure is released. The compression spring allows the engine to return to idle when pressure is released. Use a tachometer to set the governed RPM at 3,600 for the factory setting or 4,000 for competition pulling. Photo and video of this part installed on engine coming soon.
  • Speed Regulating Disc with Welded Lever and 15/64" / 6mm hole. A-1 Miller's modified part; replaces discontinued Kohler part # 41 274 10-S. $30.00 each, plus shipping & handling.
  • Complete Kit with speed regulating disc with welded lever and 15/64" / 6mm hole, compression spring, and throttle wire/cable swivel. $38.00 each kit, plus shipping & handling.

FYI - I have the capability to fabricate and/or duplicate obsolete and hard to find throttle linkages, levers and controls. If interested, please email me a photo of the engine's governor and throttle levers with the exact dimensions of the part(s) that's needed.

Remote stranded wire cable-operated spring-return foot/gas pedal throttle control setup on a 4,000± RPM governed stock Kohler engine in a competition garden pulling tractor, go-kart, older small all terrain vehicle, older snowmobile, King Midget micro car, etc. (FYI - Kohler engines in King Midget cars originally come from the factory with no governor; governor components must be installed in the engine for this setup to work.) Fits Kohler engine models K241, K301, K321, K341, K361, M10, M12, M14 and M16.

This setup will automatically return the throttle to the idle position when pressure is released. The extension spring allows the engine to return to idle when pressure is released. Use a tachometer to set the governed RPM at 3,600 for the factory setting or 4,000 for competition pulling.

To install this throttle control setup, fasten the cable housing to the extended OEM Kohler L-shaped bracket that's fastened to the engine block, or drill a 7/32" hole through the flywheel shroud and tack-weld a 3/16" nut (thread size) inside the shroud and use a 3/16" screw with a lock washer and throttle cable clamp (listed above) to securely fasten the cable housing to the shroud. Use with stranded throttle cable and foot pedal assembly. (Listed further below.) Use your existing throttle wire/cable swivel. A proven, ingenious and innovative concept by Brian Miller. Kit includes: Extension spring, grade 8 bolt w/jam nut (to replace bolt on cam cover), and cable housing clamp w/screw and nut. $9.00 each kit, plus shipping & handling.

Heavy Duty Carburetor Throttle Cable Bracket Kit for Open RPM Kohler K241, M10, K301, M12, K321, M14, K341, M16 and K361 Hot Stock, Stock Altered and Missouri Super Stock Competition Pulling Engines with the Carter or Kohler #26, #28 or #30 Carburetor. Bracket fastens on fuel inlet side of carburetor. Ideal for use with a billet cylinder head or could be used with a stock head, and with or without a carburetor extension/intake stand-off.

This design allows for less wear to the throttle shaft and/or carburetor body, which would eventually cause a vacuum leak that could cause damage to the engine, and then installation of a bronze throttle shaft bushing and/or replacement of the throttle shaft will be required.

To install the bracket, the two unthreaded bosses/shallow holes on the fuel inlet side of the Chinese-made aftermarket Kohler-replicated or OEM Carter or Kohler #26, #28 or #30 carburetor body must be drilled into the float area with a 5/32" drill bit, and threaded with a 10-24 UNC hand tap for installation of the two supplied 10-24 UNC x 3/4" length Allen head mounting screws with split lock washers. No fuel should leak out of the threaded holes with the bracket installed. And the hole in the throttle lever will need to be drilled-out/enlarged to 15/64" / 6mm for the throttle cable swivel. The supplied compression spring (as shown in the photo) returns the throttle lever to idle and it lessens wear to throttle shaft, and supplied small thrust washer prevents the end of the spring from sliding onto the cable housing when it's under full pressure at open RPM. And to avoid excessive wear and possibility of breaking of the throttle shaft, do not to set the cable so it pulls the throttle shaft beyond its normal range of rotation when in the wide open position!

Kit includes: heavy duty steel bracket, two 10-24 UNC x 3/4" length Allen head screws w/lock washers, cable clamp w/screw and lock washer, compression spring, small thrust washer and throttle cable swivel assembly. Use with stranded throttle cable and foot pedal assembly. (Listed below.) Complete Kit: $75.00 each, plus shipping & handling. A proven, ingenious and innovative concept by Brian Miller. Please do not accept advertised copycat products of this kind. (But I do appreciate them acknowledging my ingenuity and intelligence.) [Top of Page] Return To Previous Paragraph or Section

High Quality Universal Foot/Gas Pedal Kit. Use on a competition garden pulling tractor, general-use lawn and garden tractor, small motorized vehicle, hot rod, self-propelled tractor pulling sled, etc. Easy to install on foot rest/support/running board of a garden tractor and adjust the cable setting to the carburetor. To avoid excessive wear and possibility of breaking the throttle shaft in carburetor, do not to set the cable so it pulls the throttle shaft beyond its normal range of rotation when in the wide open position! Durable aluminum and steel construction. For a distinctive, nostalgic and noticeable appearance, a chrome-plated, die-cast aluminum barefoot gas pedal can be easily clamped or fastened onto this pedal. Gas pedal kit includes full cam slot cable action throttle assembly to fit many applications. Floor mount pedal constructed of premium cast aluminum and features textured pedal for grip. Gas pedal mounting base measures 2.5" x 6" x 1/4" thick. Pedal rests at 45° angle to base, has 2" inch travel with an adjustable stop bolt and jam nut. Kit includes: Foot/gas pedal assembly, 48" stranded wire inner cable x 43" metal conduit assembly (most common length) and two cable housing clamps. $80.00 each, plus shipping & handling. [Top of Page]

Heavy Duty, High Quality Replacement Throttle Cable Assemblies for Universal Foot/Gas Pedal Assembly above -

  • 48" inner stranded wire cable x 43" metal conduit housing assembly. $5.50 each, plus shipping & handling.
  • 53" inner stranded wire cable x 48" metal conduit housing assembly. $5.50 each, plus shipping & handling.
  • 60" inner stranded wire cable x 55" metal conduit housing assembly. $6.00 each, plus shipping & handling.
  • 100" inner stranded wire cable x 90" metal conduit housing assembly. $11.50 each, plus shipping & handling.
  • NOTE: The inner cables listed above come with a ball on one end and a barrel on the other end. Snip off the one you wish not to use, and to prevent the stranded wires from unraveling, lightly singe the end of the cable with a propane or oxy-acetylene torch (with a small, blue flame) to melt the strand of wires together, and carefully grind down the lump of molten metal to a point, and apply grease on the cable or pump grease inside the housing with a chainsaw bar tip grease gun, so the cable can slide back and forth easily without binding in the housing, and then reinsert the cable in the housing. The pointed end of the cable will also allow for easier insertion through the wire swivel clamp (listed above) with no difficulty.

Advertisement for Tachometers and Tachometer Kits - Please contact A-1 Miller's if you're interested in purchasing any of the products or services listed in this website. If you need a part or parts that's not listed in this website, please contact A-1 Miller's and we'll see if we can get it at a reasonable price. | [Top of Page] (Prices are subject to change without notice.)
High Quality Inductive Handheld Small Engine Wireless Tachometer. A tachometer is required in setting the correct RPM (normally 3,200 or 3,600 maximum for small engines) of an engine to prevent from over-revving and possible damage to the engine or dangerous flywheel explosion. Very accurate. For gas/spark ignite engines only. Works with magneto and battery-powered ignition systems. Very accurate. This handheld analog tachometer works great for checking/setting the RPM on various small engines in the shop, and/or for checking/setting the RPM [tech] on stock governed competition pulling engines. Hold sensor (antenna) close to spark plug wire for reading. Operates off a self-contained replaceable 9 volt battery. Has built-in battery voltage check. Reads up to 5,000 RPM on the low scale, and 15,000 RPM on the high scale.
  • $154.00 each, plus shipping & handling.
Inductive Small Engine Tachometer/Hour Meter with replaceable battery. A tachometer is required in setting the maximum speed of a small engine, which is normally 3,200 or 3,600 RPM, for small engines to prevent over-revving and possible damage to the engine or dangerous flywheel explosion. Very accurate. Can be hand-held to temporarily set engine RPM or can be surface-mounted and secured with two screws to monitor engine RPM at all times. Large 3/8 inch LCD display. Works with all spark ignition engines by selecting engine type by programming S1 and S2 buttons. Works with magneto and battery-powered ignition systems. If tachometer does not turn on automatically as soon as engine starts, press and hold the two buttons at the same time. Instructions included. Reads up to 99,999 RPM. Hour meter reads up to 9999:59 hours/minutes. Programmable maintenance hour setting with service icon, a service reminder when to change oil or other maintenance. Can be manually reset to Zero hours. Easy installation: Single wire wraps around spark plug wire and secured with two supplied nylon zip-ties. No wire terminal connections required. Weatherproof construction. Requires CR2450 battery. Dimensions: 2" wide x 1-3/4" depth x 3/4" height. $25.00 each, plus shipping & handling.
High Quality Digital Tachometer/Proximity Sensor Kits. A tachometer is required in setting the correct engine RPM (normally 3,200 or 3,600 maximum, depending on type of carburetor) to prevent from over-revving and possible internal damage or dangerous flywheel explosion. Choice of a RED or BLUE numeric display. Will work with most small engines or multi-cylinder automotive engines, gas or diesel. The great thing about this type of tachometer is that it needs no setup or programming. It displays accurate RPM as soon as the engine cranks over to start. Displays up to 9,999 RPM. Very accurate. Tachometer returns to zero [0000] when engine is shut down. Can be used for lawn & garden equipment or competition pulling engines. Designed to be permanently mounted to monitor engine RPM at all times. Tachometer can be in-dash or panel-mounted. This precision digital tachometer operates with external power and on the same principle as my flywheel- or crank-trigger ignition systems with a proximity sensor to detect the target, which can be a small ferrous steel screw or pin, or magnet in a rotating disc on the crankshaft or on/in flywheel. Operates totally independent of the ignition system, or can be used with crank trigger ignition with the same proximity sensor. Sensor is capable of powering this digital tachometer and crank-trigger ignition module at the same time, with the exception of using the Dynatek Dyna S or PerTronix Ignitor modules. This tachometer must be wired separately or wiring can be incorporated with my crank-trigger ignition system that use a proximity sensor. A sturdy steel or aluminum bracket will need to be fabricated by customer to mount the sensor in close proximity of the detector/trigger target. Set air gap/clearance at .010"-.188". Tachometer works with 8-24 volts DC, proximity sensor works with 6-36 volts DC. Dimensions for mounting hole for tachometer: 3" wide x 1-17/32" tall. Tachometer measures 1" in depth. Dimensions of proximity sensor: 15/32" diameter x 1-3/8" thread length. Wiring Instructions: #1 wire on tachometer connects to brown wire on proximity sensor and ignition switch (12 volt power), #2 wire on tachometer connects to blue wire on proximity sensor and engine/chassis ground (which connects to the negative (–) battery post), and #5 wire on tachometer connects to black wire on (either) proximity sensor. Wires #3 and #4 connects to nothing. Wiring is the same for the hall effect and inductive proximity sensors. Some proximity sensors have an LED (Light Emitting Diode) on the rear of unit. If the proximity sensor is wired incorrectly, the LED will illuminate within the target. Click or tap here for YouTube videos to see how well this tachometer works.
  • Tachometer only. Use with virtually any Normally Open 3-wire hall effect, inductive, or cube-shape inductive proximity sensor (w/flywheel trigger ignition). $22.00 each, plus shipping & handling.
  • Complete Tachometer Kit with Hall Effect Proximity Sensor (dimensions listed below) and Locking Set Screw Collar w/Embedded Magnet. When ordering, please indicate diameter of crankshaft PTO end for locking collar. $47.00 each, plus shipping & handling.
  • Complete Tachometer Kit with Inductive Proximity Sensor (dimensions listed below). Senses the head of a small steel screw installed in a rotating locking set screw collar, disc or flywheel. $32.00 each, plus shipping & handling.
  • Hall Effect Proximity Sensor. Dimensions: 15/32" Diameter x 2-1/2" Length x 43" Cable Length . (Senses the South pole of a small magnet embedded in an aluminum rotating locking set screw collar, disc, or OEM magnet embedded externally in a flywheel.) $10.00 each, plus shipping & handling.
  • Inductive Proximity Sensor. Dimensions: 15/32" Diameter x 2-1/2" Length x 43" Cable Length Inductive Proximity Sensor. (Senses the head of a small steel screw installed in a rotating locking set screw collar, disc or flywheel.) $13.00 each, plus shipping & handling.
  • Aluminum Locking Set Screw Collar w/Embedded Trigger Magnet. Use with hall effect proximity sensors only. $15.00 each, plus shipping & handling.
  • Steel Locking Set Screw Collar w/Steel Trigger Screw Head. Use with inductive proximity sensors or magnetic pickup coils. $15.00 each, plus shipping & handling.
  • When ordering either collar listed above, please specify diameter of crankshaft PTO end or shaft it's to be mounted on. Most common Kohler crankshaft PTO end diameters are 1", 1-1/8", but 3/4", 1-1/4", 1-3/8", 1-7/16" and 1-1/2" are rare. Most billet steel crankshafts have a 1-1/2" diameter PTO end (raised shoulder). Other sizes available. [Return to previous section]

Internal Engine Rebuild Parts for Kohler K-Series and Magnum Engines - Please contact A-1 Miller's if you're interested in purchasing any of the products or services listed in this website. If you need a part or parts that's not listed in this website, please contact A-1 Miller's and we'll see if we can get it at a reasonable price. | [Top of Page] (Prices are subject to change without notice.)
Crankshaft Oil Seals. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8. Each included with complete engine rebuild gasket set listed below. IMPORTANT - Before installing any new oil seal, always apply oil or grease inside the seal and on the shaft to keep the rubber lubricated and cool until internal oil can reach it. With no prior lubrication, the dry rubber will wear away from friction, eventually causing another oil leak. Do the job right the first time, and it won't have to be done again for a long time.
  • Flywheel End. High quality aftermarket. Dimensions: 1.250" I.D. x 1.500" O.D. Replaces discontinued Kohler part # X-583-1-S. $7.00 each, plus shipping & handling.
  • PTO End. High quality aftermarket. Dimensions: 1.250" I.D. x 1.629" O.D. Replaces discontinued Kohler part # X-583-2-S. $9.50 each, plus shipping & handling.


Crankshaft Oil Seal Installation Drivers/Tools for Kohler engine models K241, K301, K321, K341, K361, M10, M12, M14 and M16. Each installs flywheel end or PTO end oil seal to proper depth (1/8" below surface of housing hole) without damage. Use with medium size hammer. Fabricated by A-1 Miller's. Neither no longer available from Kohler. $25.00 each, plus shipping & handling.

Crankshaft Oil Seals listed below. Fits Kohler engine models K241, K301, K321, K341, K361, M10, M12, M14 and M16. Each included with complete engine rebuild gasket set listed below. Shown with protective lubricating grease applied to inside of seal. IMPORTANT - Before installing any new oil seal, always apply oil or grease inside the seal and on the shaft to keep the rubber lubricated and cool until internal oil can reach it. With no prior lubrication, the dry rubber will wear away from friction, eventually causing another oil leak. Do the job right the first time, and it won't have to be done again for a long time.

  • Oil Seal for Flywheel End. Dimensions of each seal below: 1.500" I.D. x 2" O.D. Each included with complete engine rebuild gasket set listed below. NOTE: Install seal 1/8" below surface of housing hole.
    • High quality aftermarket. Replaces Kohler part # 47 032 06-S. $14.00 each, plus shipping & handling.
    • OEM Kohler part # 47 032 06-S. $15.00 each, plus shipping & handling.
  • Oil Seals for PTO End. Dimensions of each seal below: 1.500" I.D. x 2.378" O.D. x .308" Thickness. NOTE: Install seal 1/8" below surface of housing hole.
    • High quality aftermarket. Replaces Kohler part # 47 032 07-S. $14.00 each, plus shipping & handling.
    • OEM Kohler part # 47 032 07-S. $15.00 each, plus shipping & handling.
    • High quality aftermarket. 1/2" thickness w/metal casing. Prevents seal on PTO end of K341, K361, M16, and open RPM competition pulling engines from being sucked into crankcase due to increased internal vacuum due to a larger piston and/or longer stroke, and at high RPM. To prevent an oil leak and to guarantee that seal will not eventually slip inward, apply liquid threadlocker on outside of seal and/or in housing hole before installing. Replaces discontinued Kohler part # X-379-9. $25.00 each, plus shipping & handling.


Crankshaft Oil Seals. Fits Kohler KT-series and Magnum Opposed Twin Cylinder Engines. Each included with complete engine rebuild gasket set listed below. Shown with protective lubricating grease applied to inside seal. IMPORTANT - Before installing any new oil seal, always apply oil or grease inside the seal and on the shaft to keep the rubber lubricated and cool until internal oil can reach it. With no prior lubrication, the dry rubber will wear away from friction, eventually causing another oil leak. Do the job right the first time, and it won't have to be done again for a long time.

  • Fits Flywheel End of Kohler engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. Also Fits PTO End of Kohler engine models MV16, MV18 and MV20. Dimensions: 1.370" I.D. x 1.780" O.D.
    • High quality aftermarket. Replaces Kohler part # 52 032 10-S. $15.00 each, plus shipping & handling.
    • OEM Kohler part # 52 032 10-S. $16.30 each, plus shipping & handling.
  • Fits PTO End of Kohler engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18 and M20. Dimensions: 1.370" I.D. x 2.378" O.D.
    • High quality aftermarket w/metal casing. To prevent an oil leak, apply clear RTV silicone adhesive sealant on the outside of seal or in the housing hole before installing. Replaces Kohler part # X-583-5-S. $10.00 each, plus shipping & handling.
    • High quality aftermarket OEM-type w/rubber-coated metal casing. Replaces Kohler part # X-583-5-S. $15.00 each, plus shipping & handling.
    • OEM Kohler part # X-583-5-S. $16.30 each, plus shipping & handling.
Flywheel End Crankshaft Oil Seal. Fits Kohler engine models K482, K532 and K582.
  • OEM Kohler part # 277065-S. $29.00 each, plus shipping & handling.
PTO End Crankshaft Oil Seal. Fits Kohler engine models K482, K532 and K582.
  • OEM Kohler part #'s 25 032 06-S, 52 032 08-S. $8.60 each, plus shipping & handling
Bearing Plate Shim Gaskets. Fits Kohler K-series engine models K141, K160/K161, KV161, L160/L161, L181 and K181, Will also fit Kohler Magnum engine model M8 with clear RTV silicone adhesive sealant applied to seal up end of cam pin hole on flywheel end to prevent oil leak. Use various thicknesses of these to set the crankshaft clearance end-play at .002" (for low RPM engines) to .023" (for high RPM engines). Several of each included with complete engine rebuild gasket set listed further down in this website.
  • .015" Thickness. OEM Kohler part # 230112-S. $4.95 each, plus shipping & handling.
  • .030" Thickness. OEM Kohler part # 230071-S. $8.95 each, plus shipping & handling.


Bearing Plate Shim Gaskets. Fits Kohler K-series engine models K241, K301, K321, K341 and K361. Will also fit Kohler Magnum engine models M10, M12, M14 and M16 with clear RTV silicone adhesive sealant applied to seal up end of cam pin hole on flywheel end to prevent oil leak. Use various thicknesses of these to set the crankshaft clearance end-play between .003" (for low RPM engines) to .020" (for high RPM engines). Several of each included with complete engine rebuild gasket sets listed further down in this website.

  • .015" Thickness. OEM Kohler part # 235070-S. $5.90 each, plus shipping & handling.
  • .030" Thickness. OEM Kohler part # 235757-S. $10.10 each, plus shipping & handling.
Oil Pan Gaskets. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8. Included in complete engine rebuild gasket set listed below.
  • High quality aftermarket. $3.50 each, plus shipping & handling.
  • OEM Kohler part # 41 041 03-S. $6.65 each, plus shipping & handling.


Oil Pan Gaskets. .030" Thickness. Fits narrow base block Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361 with a narrow cast aluminum or cast iron oil pan, or if the block have been converted for use with a narrow base oil pan. Included in complete engine rebuild gasket set listed below. When ordering, please specify if you have a wide or narrow base block or oil pan. Click or tap here to determine if your engine is a wide or narrow base block.

  • High quality aftermarket. $5.00 each, plus shipping & handling.
  • OEM Kohler part # 235353-S. $7.65 each, plus shipping & handling.


Oil Pan Gasket. .060" Thickness. Fits narrow base block Kohler K-series engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361. To be used with a pressed steel sheet metal oil pan. Special use part; not included in complete engine rebuild gasket set. When ordering, please specify if you have a wide or narrow base block or oil pan. Click or tap here to determine if your engine is a wide or narrow base block.

  • OEM Kohler part # 47 041 07-S. $16.60 each, plus shipping & handling.


Oil Pan Gaskets. Fits wide base block Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361 with a wide base block. Included in complete engine rebuild gasket set listed below. Please specify if you have a wide or narrow base block or oil pan. Click or tap here to determine if your engine is a wide or narrow base block.

  • High quality aftermarket. $3.50 each, plus shipping & handling.
  • OEM Kohler part # 235057-S. $7.35 each, plus shipping & handling.
Cylinder head gasket. Fits Kohler engine models K90/K91. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Cylinder head bolt torque values and sequences. Included in complete engine rebuild gasket set listed below.
  • High quality aftermarket. Replaces Kohler part # 220124-S. $8.00 each, plus shipping & handling.
  • OEM Kohler part # 220124-S. $10.14 each, plus shipping & handling.
Cylinder head gasket. Fits Kohler engine models K141, K160/K161, K181 and M8. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Cylinder head bolt torque values and sequences. Included in complete engine rebuild gasket set listed below.
  • High quality aftermarket. Replaces Kohler part # 41 041 10-S. $7.00 each, plus shipping & handling.
  • OEM Kohler part # 41 041 10-S. $10.76 each, plus shipping & handling.
Cylinder head gasket. Fits Kohler engine models K241, M10, K301, M12, K321 and M14. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Cylinder head bolt torque values and sequences. Included in complete engine rebuild gasket set listed below
  • High quality aftermarket. Replaces Kohler part # 47 041 15-S. $6.25 each, plus shipping & handling.
  • OEM Kohler part # 47 041 15-S. $22.40 each, plus shipping & handling.
Cylinder head gasket. Fits Kohler engine models K341 and M16. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Cylinder head bolt torque values and sequences. Included in complete engine rebuild gasket set listed below.
  • High quality aftermarket. Replaces Kohler part # 45 041 17-S. $11.50 each, plus shipping & handling.
  • OEM Kohler part # 45 041 17-S. $17.52 each, plus shipping & handling.
Cylinder head gasket. Fits Kohler engine model K361. Approximately .050" compressed thickness with steel fire ring. Doesn't need to be retorqued again once hot. Cylinder head bolt torque values and sequences. Included in complete engine rebuild gasket set listed below.
  • High quality aftermarket. Replaces discontinued Kohler part # 45 052 02-S and Cub Cadet/MTD part # KH-45-052-02-S. $24.00 each, plus shipping & handling.
Cylinder head gasket. Fits Kohler engine models MV16, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18, MV18, M20 and MV20. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Cylinder head bolt torque values and sequences. Included in complete engine rebuild gasket set listed below.
  • High quality aftermarket. Replaces Kohler part # 52 041 20-S. $21.00 each, plus shipping & handling.
  • OEM Kohler part # 52 041 20-S. $25.60 each, plus shipping & handling.
Cylinder head gasket. Fits Kohler engine models K482, K532 and K582. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Cylinder head bolt torque values and sequences. Included in complete engine rebuild gasket set listed below.
  • OEM Kohler part # 48 041 13-S. $11.30 each, plus shipping & handling.
Cylinder Head Gasket. Fits Kohler engine models K660 and K661. Torque head bolts to 15-20 ft. lb. / 180-240 in. lb. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot.
  • New Old Stock. Discontinued Kohler part # 275156-S. $35.00± each (depending on source), plus shipping & handling. (When available.)
Complete Engine Rebuild Gasket Sets w/Oil Seals Listed Below - Please contact A-1 Miller's if you're interested in purchasing any of the products or services listed in this website. If you need a part or parts that's not listed in this website, please contact A-1 Miller's and we'll see if we can get it at a reasonable price. | [Return To Previous Paragraph, Section or Website] [Top of Page] (Prices are subject to change without notice.)
Complete Engine Rebuild Gasket Sets w/oil seals. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181 and K181, NOTE: These gasket sets can also be used on the Kohler Magnum M8 engine by applying clear RTV silicone adhesive sealant where the flywheel end cam pin hole is to prevent an oil leak.
  • High quality aftermarket. Does not include crankcase breather filter. Replaces Kohler part # 41 755 06-S. $24.00 each, plus shipping & handling.
  • OEM Kohler part # 41 755 06-S. $88.00 each, plus shipping & handling.
Complete Engine Rebuild Gasket Sets w/oil seals. Fits Kohler engine models K241, K301 and K321. NOTE: Being the gasket set for Kohler Magnum M10, M12 and M14 engines are no longer available, these gasket sets can also be used on the Magnum engines by applying clear RTV silicone adhesive sealant where the flywheel end cam pin hole is to prevent an oil leak.
  • High quality aftermarket. Does not include crankcase breather filter. Replaces Kohler part # 47 755 08-S. $32.50 each, plus shipping & handling.
  • OEM Kohler part # 47 755 08-S. $118.70 each, plus shipping & handling.
Complete Engine Rebuild Gasket Sets w/oil seals. Fits Kohler engine model K341. NOTE: Being the gasket set for Kohler Magnum M16 engine is no longer available, these gasket sets can also be used on the Magnum engines by applying clear RTV silicone adhesive sealant where the flywheel end cam pin hole is to prevent an oil leak.
  • High quality aftermarket. Does not include crankcase breather filter. Replaces Kohler part # 45 755 04-S. $36.50 each, plus shipping & handling.
  • OEM Kohler part # 45 755 04-S. $97.65 each, plus shipping & handling.
Complete Engine Rebuild Gasket Set w/oil seals. Fits Kohler model K361 cast iron block single cylinder OHV engine. [Return To Previous Paragraph, Section or Website]
  • High quality aftermarket. Does not include crankcase breather filter. Replaces discontinued Kohler part # 45 755 06-S. $60.00 each, plus shipping & handling.
Complete Engine Rebuild Gasket Sets w/oil seals and valve stem seals. Fits Kohler engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20.
  • High quality aftermarket. Does not include crankcase breather filter. Replaces Kohler part # 25 755 37-S. $30.00 each, plus shipping & handling.
  • OEM Kohler part # 25 755 37-S. $179.10 each, plus shipping & handling.
Complete Engine Rebuild Gasket Set w/oil seals. Fits Kohler engine models K482, K532 and K582. NOTE: The gaskets and oil seals in this set will not fit the K660/K662 engines.
  • High quality aftermarket. Replaces discontinued Kohler part # 48 755 33-S. $40.00 each, plus shipping & handling.
Exhaust Port Gasket. Fits Kohler engine models K141, K160/K161 and K181 with 1-9/16" bolt hole spacing. OEM Kohler part # 231090-S. $4.35 each, plus shipping & handling.

Exhaust Port Gasket. Fits Kohler engine models K141, K160/K161, K181 and M8 with 1-11/16" bolt hole spacing. OEM Kohler part # 41 041 01-S. $4.95 each, plus shipping & handling.

Exhaust Port Gasket. Fits Kohler engine models K241, M10, K301, M12 and K321, M14. OEM Kohler part # 235122-S. $7.70 each, plus shipping & handling.

Exhaust Port Gasket. Fits Kohler engine model K361. OEM Kohler part # 45 041 12-S. $4.95 each, plus shipping & handling.

NOTE: Exhaust port gaskets for Kohler engine models K90/K91 (part # 220122-S), K341 and M16 (part # 45 041 15-S) are discontinued. Use clear RTV silicone adhesive sealant instead. (Silicone sealant is heat-resistant, it will NOT burn out, even with extreme exhaust heat.)

Exhaust Manifold-to-Cylinder Mounting Gaskets. Fits Kohler flathead twin cylinder engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. 1-3/4" offset bolt hole spacing.
  • OEM Kohler part # 52 041 14-S. $6.05 each, plus shipping & handling.
Exhaust Manifold to Block Mounting Gasket. Fits Kohler opposed (flathead) twin cylinder engine models K482, K532 and K582.
  • OEM Kohler part # 25 041 11-S. $8.01 each, plus shipping & handling.

[Return to Previous Section, Paragraph or Website]

New Ring Sets, and Piston and Ring Set - Please contact A-1 Miller's if you're interested in purchasing any of the products or services listed in this website. If you need a part or parts that's not listed in this website, please contact A-1 Miller's and we'll see if we can get it at a reasonable price. | (Prices are subject to change without notice.) NOTE: A-1 Miller's sell individual engine parts only. Because with "complete" engine rebuild kits that others offer, they always sell you extra parts your engine don't need, and/or leave out parts your engine do need. Completely disassemble your engine to determine which parts your engine needs and if the cylinder in your block and crank journal needs machine work performed, then email me a list of parts. Include the engine's model and specification numbers, too. [Top of Page]
NOTE: All parts listed below are NEW, unless otherwise stated. A-1 Miller's do not sell cheap junk! As a matter of fact, most OEM Kohler parts are made in China now. Kohler owns some of the factories in China that make the parts. And most aftermarket parts are also made by Kohler in China. Kohler just place the part(s) in a generic box and sell them for less money. So when purchasing a genuine OEM Kohler part that comes in a box with the Kohler name on it, you're really just paying more money for the name. And as far as some parts being no longer available - either the parts didn't sell well or the EPA is trying to phase out parts for the old cast iron block flathead engines because they produce more air pollution than the newer OHV engines.
Kohler engine models K90/K91 Ring Sets, and Piston with Rings (includes wrist pin, retaining clips). Rings made of high grade cast iron for durability. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Set Only. Fits K90/K91 engines with 2.375" cylinder bore. Also replaces Briggs & Stratton part #'s 294232, 295657 (3hp), and Clinton part #'s 233112500, 233122500. High quality aftermarket. Same appearance and quality as discontinued Kohler part # 220801-S. $16.50 per set, plus shipping & handling.
  • STD Size Piston with Rings Assembly. Discontinued Kohler part # 46 874 01-S. NOS (New Old Stock). Price depends on source and availability.
  • .003" Oversize Piston and Ring Set. Fits K90/K91 engines with 2.378" cylinder bore. OEM Kohler part # 46 874 02-S. $304.50 per set, plus shipping & handling.
  • .010" (.25mm) Oversize Ring Set Only. Discontinued Kohler part # 220802-S and discontinued Briggs & Stratton part # 294224.
  • .010" (.25mm) Oversize Piston with Rings Assembly. Discontinued Kohler part # 46 874 03-S. NOS (New Old Stock). Price depends on source and availability.
  • .020" (.50mm) Oversize Ring Set Only. Discontinued Kohler part # 220803-S. NOS (New Old Stock). Price depends on source and availability.
  • .020" (.50mm) Oversize (2.395" cylinder bore. OEM Kohler part # 46 874 04-S. $304.50 per set, plus shipping & handling.
  • .030" (.75mm) Oversize Ring Set Only. Fits K90/K91 engines with 2.405" cylinder bore. OEM Kohler part # 220804-S. $116.70 per set, plus shipping & handling.
  • .030" (.75mm) Oversize Piston with Rings. Discontinued Kohler part # 46 874 05-S. NOS (New Old Stock). Price depends on source and availability.
Kohler engine models K141, K160, early K161 KV161 and L160/L161 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). These are for the smaller 2-7/8" diameter cylinder bore. Cylinder can be bored to 2-15/16", and the bigger piston and rings listed below can be used. Rings made of high grade cast iron for durability. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Set Only. Discontinued Kohler part # 231424-S. NOS (New Old Stock). Price depends on source and availability.
  • STD Size Piston and Ring Set. Fits K141, K160 and early K161 engines with 2.875" cylinder bore. OEM Kohler part # 41 874 01-S. $219.50 each, plus shipping & handling.
  • .010" (.25mm) Oversize Ring Set Only. Fits K141, K160 and early K161 engines with 2.885" cylinder bore. OEM Kohler part # 231425-S. $113.80 per set, plus shipping & handling.
  • .010" (.25mm) Oversize Piston and Ring Set. Discontinued Kohler part # 41 874 02-S. NOS (New Old Stock). Price depends on source and availability.
  • .020" (.50mm) Oversize Ring Set Only. Fits K141, K160 and early K161 engines with 2.895" cylinder bore. OEM Kohler part # 231426-S. $117.50 per set, plus shipping & handling.
  • .020" (.50mm) Oversize Piston and Ring Set. Discontinued Kohler part # 41 874 03-S. NOS (New Old Stock). Price depends on source and availability.
  • .030" (.75mm) Oversize Ring Set Only. Discontinued Kohler part # 231427-S. NOS (New Old Stock). Price depends on source and availability.
  • .030" (.75mm) Oversize Piston with Rings Assembly. Discontinued Kohler part # 41 874 04-S. NOS (New Old Stock). Price depends on source and availability.
Kohler K-series and Magnum engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). These are for the bigger 2-15/16" diameter cylinder bore. Rings made of high grade cast iron for durability. FYI - When the 2-15/16" piston and rings assembly is used in the K141, K160/K161, KV161, L160/L161 engines, the same connecting rod and crankshaft can be used. The rotating assembly will not need to be rebalanced. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. Fits K141, K160/K161, KV161, L160/L161, L181, K181 and M8 engines with 2.938" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same appearance and quality as OEM Kohler part # 232575-S. $24.00 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 232575-S. $89.95 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 41 108 01-S. $87.70 per set, plus shipping & handling.
  • STD Size Pistons with Matching Ring Set. Fits K141, K160/K161, KV161, L160/L161, L181, K181 and M8 engines with 2.938" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 41 874 05-S. $40.50 each, plus shipping & handling.
    • K-series cast piston with rings. Discontinued Kohler part # 41 874 05-S. NOS (New Old Stock). Price depends on source and availability.
    • Magnum Mahle forged piston with rings. OEM Kohler part # 41 874 10-S. $223.05 each, plus shipping & handling.
  • .003" Oversize Piston with Rings Assemblies.
    • K-series piston and rings. Discontinued Kohler part # 41 874 06-S. NOS (New Old Stock). Price depends on source and availability.
    • Magnum Mahle forged piston and rings. Discontinued Kohler part # 41 874 11-S. NOS (New Old Stock). Price depends on source and availability.
  • .010" (.25mm) Oversize Ring Sets Only. Fits K141, K160/K161, KV161, L160/L161, L181, K181 and M8 engines with 2.948" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same appearance and quality as OEM Kohler part # 232576-S. $10.50 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 232576-S. $80.85 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 41 108 02-S. $93.60 per set, plus shipping & handling.
  • .010" (.25mm) Oversize Pistons with Matching Ring Set. Fits K141, K160/K161, KV161, L160/L161, L181, K181 and M8 engines with 2.948" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 41 874 07-S. $31.50 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 41 874 07-S. $271.70 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. OEM Kohler part # 41 874 12-S. $215.50 each, plus shipping & handling.
  • .020" (.50mm) Oversize Ring Sets Only. Fits K141, K160/K161, KV161, L160/L161, L181, K181 and M8 engines with 2.958" cylinder bore. Not available in aftermarket.
    • Fits K-series cast piston. OEM Kohler part # 232577-S. $118.00 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 41 108 03-S. $94.15 per set, plus shipping & handling.
  • .020" (.50mm) Oversize Pistons with Matching Ring Set. Fits K141, K160/K161, K181 and M8 engines with 2.958" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 41 874 08-S. $40.50 each, plus shipping & handling.
    • K-series cast piston with rings. Discontinued Kohler part # 41 874 08-S. NOS (New Old Stock). Price depends on source and availability.
    • Magnum Mahle forged piston with rings. Discontinued Kohler part # 41 874 13-S. NOS (New Old Stock). Price depends on source and availability.
  • .030" (.75mm) Oversize Ring Sets Only. Fits K141, K160/K161, KV161, L160/L161, L181, K181 and M8 engines with 2.968" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same appearance and quality as OEM Kohler part # 232578-S. $12.00 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 232578-S. $118.20 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 41 108 04-S. $94.00 per set, plus shipping & handling.
  • .030" (.75mm) Oversize Pistons with Matching Ring Set. Fits K141, K160/K161, KV161, L160/L161, L181, K181 and M8 engines with 2.968" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 41 874 09-S. $58.50 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 41 874 09-S. $282.60 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. OEM Kohler part # 41 874 14-S. $215.70 each, plus shipping & handling.
Kohler K-series and Magnum engine models K241, M10 and K482 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). (The K241, M10 and K482 engines use the same piston and rings.) Priced per cylinder. Rings made of high grade cast iron for durability. Compression height is 1.63". Being the wrist pin is centered, these pistons can be installed in either direction. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. Fits K241, M10 and K482 engines with 3.250" cylinder bore.
    • High quality aftermarket. Same appearance and quality as OEM Kohler part # 235287-S. $24.00 per set, plus shipping & handling.
    • OEM Kohler part # 235287-S. $72.20 per set, plus shipping & handling.
  • STD Size Pistons with Matching Ring Set. Fits K241, M10 and K482 engines with 3.250" cylinder bore.
    • High quality aftermarket. Same appearance and quality as OEM Kohler part # 47 874 01-S. $43.00 each, plus shipping & handling.
    • OEM Kohler part # 47 874 01-S. $216.00 each, plus shipping & handling.
  • .003" Oversize Cast Piston with Rings Assembly. Fits K241, M10 and K482 engines with 3.253" cylinder bore.
    • OEM Kohler part # 47 874 02-S. $221.00 each, plus shipping & handling.
  • .010" (.25mm) Oversize Ring Sets Only. Fits K241, M10 and K482 engines with 3.260" cylinder bore.
    • High quality aftermarket. Same appearance and quality as OEM Kohler part # 235288-S. $19.00 per set, plus shipping & handling.
    • OEM Kohler part # 235288-S. $83.00 per set, plus shipping & handling.
  • .010" (.25mm) Oversize Pistons with Matching Ring Set. Fits K241, M10 and K482 engines with 3.260" cylinder bore.
    • High quality aftermarket. Same appearance and quality as OEM Kohler part # 47 874 03-S. $40.00 each, plus shipping & handling.
    • OEM Kohler part # 47 874 03-S. $216.00 each, plus shipping & handling.
  • .020" (.50mm) Oversize Ring Sets Only. Fits K241, M10 and K482 engines with 3.270" cylinder bore.
    • High quality aftermarket. Same appearance and quality as OEM Kohler part # 235289-S. $14.00 per set, plus shipping & handling.
    • OEM Kohler part # 235289-S. $95.14 per set, plus shipping & handling.
  • .020" (.50mm) Oversize Pistons with Matching Ring Set. Fits K241, M10 and K482 engines with 3.270" cylinder bore.
    • High quality aftermarket. Same appearance and quality as OEM Kohler part # 47 874 04-S. $40.00 each, plus shipping & handling.
    • OEM Kohler part # 47 874 04-S. $247.81 each, plus shipping & handling.
  • .030" (.75mm) Oversize Ring Sets Only. Fits K241, M10 and K482 engines with 3.280" cylinder bore.
    • High quality aftermarket. Same appearance and quality as OEM Kohler part # 235290-S. $14.00 per set, plus shipping & handling.
    • OEM Kohler part # 235290-S. $95.14 per set, plus shipping & handling.
  • .030" (.75mm) Oversize Pistons with Matching Ring Set. Fits K241, M10 and K482 engines with 3.280" cylinder bore.
    • High quality aftermarket. Same appearance and quality as OEM Kohler part # 47 874 05-S. $45.00 each, plus shipping & handling.
    • OEM Kohler part # 47 874 05-S. $247.81 each, plus shipping & handling.
Kohler K-series and Magnum models K301, M12 and K532 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). (The K301, M12 and K532 engines use the same piston and rings.) Priced per cylinder. Rings made of high grade cast iron for durability. Compression height is 1.7". Being the wrist pin is centered, these pistons can be installed in either direction. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. Fits K301, M12 and K532 engines with 3.375" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same appearance and quality as OEM Kohler part # 48 108 01-S. $16.00 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 01-S. $69.59 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 01-S. $91.95 per set, plus shipping & handling.
  • STD Size Pistons with Matching Ring Set. Fits K301, M12 and K532 engines with 3.375" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 47 874 06-S and 48 874 01-S. $39.00 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 47 874 06-S. $184.44 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 48 874 01-S. $288.99 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. Discontinued Kohler part # 47 874 16-S. NOS (New Old Stock). Price depends on source and availability.
  • .003" Oversize Piston with Rings Assembly. Fits K301, M12 and K532 engines with 3.378" cylinder bore. Magnum Mahle forged piston with rings. Discontinued Kohler part # 47 874 17-S. NOS (New Old Stock). Price depends on source and availability.
  • .010" (.25mm) Oversize Ring Sets Only. Fits K301, M12 and K532 engines with 3.385" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same appearance and quality as OEM Kohler part # 48 108 02-S. $18.00 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 02-S. $119.30 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 02-S. $102.75 per set, plus shipping & handling.
  • .010" (.25mm) Oversize Pistons with Matching Ring Set. Fits K301, M12 and K532 engines with 3.385" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 47 874 08-S and 48 874 03-S. $57.00 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 47 874 08-S. $247.81 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 48 874 03-S. $228.89 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. Discontinued Kohler part # 47 874 18-S. NOS (New Old Stock). Price depends on source and availability.
  • .020" (.50mm) Oversize Ring Sets Only. Fits K301, M12 and K532 engines with 3.395" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same appearance and quality as OEM Kohler part # 48 108 03-S. $18.00 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 03-S. $119.30 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 03-S. $83.03 per set, plus shipping & handling.
  • .020" (.50mm) Oversize Pistons with Matching Ring Set. Fits K301, M12 and K532 engines with 3.395" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 47 874 09-S and 48 874 04-S. $46.00 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 47 874 09-S. $247.81 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 48 874 04-S. $228.99 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. OEM Kohler part # 47 874 19-S. $182.66 each, plus shipping & handling.
  • .030" (.75mm) Oversize Ring Sets Only. Fits K301, M12 and K532 engines with 3.405" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same appearance and quality as OEM Kohler part # 48 108 04-S. $18.00 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 04-S. $119.19 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 04-S. $83.03 per set, plus shipping & handling.
  • .030" (.75mm) Oversize Pistons with Matching Ring Set. Fits K301, M12 and K532 engines with 3.405" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 47 874 10-S. $36.00 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 47 874 10-S. $247.81 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. OEM Kohler part # 47 874 20-S. $182.66 each, plus shipping & handling.
  • .040" (1.0mm) Oversize High Quality Ring Set. Fits K301, M12 and K532 engines with 3.415" cylinder bore. Not available from Kohler. $30.00 each, plus shipping & handling.
  • .040" (1.0mm) Oversize Cast Piston with High Quality Rings. Fits K301, M12 and K532 engines with 3.415" cylinder bore. Not available from Kohler. $75.00 each, plus shipping & handling.
Kohler K-series and Magnum models K321, M14 and K582 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). (The K321, M14 and K582 engines use the same piston and rings.) Priced per cylinder. Compression height is 1.7". Rings made of high grade cast iron for durability. And being the wrist pin is centered, these pistons can be installed in either direction. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. Fits K321, M14 and K582 engines with 3.500" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same appearance and quality as OEM Kohler part # 48 108 05-S. $24.00 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 05-S. $101.23 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. Discontinued Kohler part # 47 108 05-S. NOS (New Old Stock). Price depends on source and availability.
  • STD Size Pistons with Matching Ring Set. Fits K321, M14 and K582 engines with 3.500" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as Discontinued Kohler part # 47 874 11-S. $55.00 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. Discontinued Kohler part # 47 874 21-S. NOS (New Old Stock). Price depends on source and availability.
  • .003" Oversize Cast Piston with Rings Assembly. Discontinued Kohler part # 47 874 12-S. NOS (New Old Stock). Price depends on source and availability.
  • .010" (.25mm) Oversize Ring Sets Only. Fits K321, M14 and K582 engines with 3.510" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same appearance and quality as OEM Kohler part # 48 108 06-S. $18.00 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 06-S. $102.75 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. Discontinued Kohler part # 47 108 06-S. NOS (New Old Stock). Price depends on source and availability.
  • .010" (.25mm) Oversize Pistons with Matching Ring Set. Fits K321, M14 and K582 engines with 3.510" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 47 874 13-S. $52.00 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 47 874 13-S. $247.81 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. OEM Kohler part # 47 874 23-S. $301.81 each, plus shipping & handling.
  • .020" (.50mm) Oversize Ring Sets Only. Fits K321, M14 and K582 engines with 3.520" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same appearance and quality as OEM Kohler part # 48 108 07-S. $15.00 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 07-S. $119.30 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 07-S. $106.22 per set, plus shipping & handling.
  • .020" (.50mm) Oversize Pistons with Matching Ring Set. Fits K321, M14 and K582 engines with 3.520" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as Discontinued Kohler part # 47 874 14-S. $49.00 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. Discontinued Kohler part # 47 874 24-S. NOS (New Old Stock). Price depends on source and availability.
  • .030" (.75mm) Oversize Ring Sets Only. Fits K321, M14 and K582 engines with 3.530" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same appearance and quality as OEM Kohler part # 48 108 08-S. $20.00 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 08-S. $119.30 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. Discontinued Kohler part # 47 108 08-S. NOS (New Old Stock). Price depends on source and availability.
  • .030" (.75mm) Oversize Pistons with Matching Ring Set. Fits K321, M14 and K582 engines with 3.530" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 47 874 15-S. $63.00 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 47 874 15-S. $247.81 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. Discontinued Kohler part # 47 874 25-S. NOS (New Old Stock). Price depends on source and availability.
  • .040" (1.0mm) Oversize High Quality Ring Set. Fits K321, M14 and K582 engines with 3.415" cylinder bore. Not available from Kohler. $30.00 each, plus shipping & handling.
  • .040" (1.0mm) Oversize Cast Piston with High Quality Rings. Fits K321, M14 and K582 engines with 3.415" cylinder bore. Not available from Kohler. $80.00 each, plus shipping & handling.
Kohler K-series and Magnum engine models K341, M16 and K361 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). (The K341, M16 and K361 engines use the same piston and rings.) Compression height is 1.7". Rings made of high grade cast iron for durability. Wrist pin is offset to reduce piston slap. Therefore, piston installs with notch facing flywheel. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. Fits K341, M16 and K361 engines with 3.750" cylinder bore.
    • High quality aftermarket. Fits K-series cast piston. Same appearance and quality as OEM Kohler part # 45 108 06-S. $39.00 per set, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 45 108 06-S. $94.09 per set, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 41 108 01-S. $67.18 per set, plus shipping & handling.
  • STD Size Pistons with Matching Ring Set. Fits K341, M16 and K361 engines with 3.750" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 45 874 01-S. $102.40 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 45 874 01-S. $290.59 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. Discontinued Kohler part # 45 874 11-S. NOS (New Old Stock). Price depends on source and availability.
  • .003" Oversize Cast Piston and Ring Sets. Fits K341, M16 and K361 engines with 3.753" cylinder bore.
    • K-series cast piston with rings. OEM Kohler part # 45 874 02-S. $400.30 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. Discontinued Kohler part # 45 874 12-S. NOS (New Old Stock). Price depends on source and availability.
  • .010" (.25mm) Oversize Ring Sets Only. Fits K341, M16 and K361 engines with 3.760" cylinder bore.
    • Fits K-series cast piston. OEM Kohler part # 45 108 07-S. $98.63 per set, plus shipping & handling. Not available in aftermarket.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 45 108 11-S. $143.45 per set, plus shipping & handling.
  • .010" (.25mm) Oversize Pistons with Matching Ring Set. Fits K341, M16 and K361 engines with 3.760" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 45 874 03-S. $96.00 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 45 874 03-S. $290.59 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. OEM Kohler part # 45 874 13-S. $317.30 each, plus shipping & handling.
  • .020" (.50mm) Oversize Ring Sets Only. Fits K341, M16 and K361 engines with 3.770" cylinder bore.
    • Fits K-series cast piston. OEM Kohler part # 45 108 08-S. $98.63 per set, plus shipping & handling. Not available in aftermarket.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 45 108 12-S. $106.80 per set, plus shipping & handling.
  • .020" (.50mm) Oversize Pistons with Matching Ring Set. Fits K341, M16 and K361 engines with 3.770" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as OEM Kohler part # 45 874 04-S. $96.00 each, plus shipping & handling.
    • K-series cast piston with rings. OEM Kohler part # 45 874 04-S. $322.20 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. Discontinued Kohler part # 45 874 14-S. NOS (New Old Stock). Price depends on source and availability.
  • .030" (.75mm) Oversize Ring Sets Only. Fits K341, M16 and K361 engines with 3.780" cylinder bore.
    • Fits K-series cast piston. NOS Discontinued Kohler part # 45 108 09-S. $96.00 per set, plus shipping & handling. (When available.)
    • Fits Magnum Mahle forged piston. OEM Kohler part # 45 108 13-S. $106.80 per set, plus shipping & handling.
  • .030" (.75mm) Oversize Pistons with Matching Ring Set. Fits K341, M16 and K361 engines with 3.780" cylinder bore.
    • High quality aftermarket. K-series cast piston with rings. Same appearance and quality as Discontinued Kohler part # 45 874 05-S. $96.00 each, plus shipping & handling.
    • Magnum Mahle forged piston with rings. Discontinued Kohler part # 45 874 15-S. NOS (New Old Stock). Price depends on source and availability.
  • .040" (1.0mm) Oversize High Quality Ring Set. Fits K341, M16 and K361 engines with 3.790" cylinder bore. Not available from Kohler. $60.00 each, plus shipping & handling.
  • .040" (1.0mm) Oversize Cast Piston with High Quality Rings. Fits K341, M16 and K361 engines with 3.790" cylinder bore. Not available from Kohler. $120.00 each, plus shipping & handling. [Return To Previous Paragraph, Section or Website]
Ring Sets Only, and Pistons with Rings. Pistons include wrist pin and wire cir-clip retainers. Fits Kohler opposed twin cylinder engine models KT17 (first design), KT17 Series II, MV16, M18 and MV18. The KT17 (first design), KT17 Series II, MV16, M18 and MV18 pistons all have the same dimensions, same wrist pin diameter (.6247"-.6249") and same compression height (1.125"), and all use the same rings. The only difference is the OEM KT17 and KT17 Series II pistons are cast aluminum, and the OEM MV16, M18 and MV18 pistons are forged, and made by Mahle. Priced per cylinder. To maintain engine balance and reduce vibration, two sets of matching oversize pistons and rings are required. IMPORTANT: Check and set ring end gaps for proper clearance before installing to prevent rings from expanding when hot and galling the cylinder wall. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. (3.125" diameter cylinder bore.)
    • High quality aftermarket. Replaces Kohler part # 52 108 09-S. $30.00 per set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 09-S. $90.35 per set (for one cylinder), plus shipping & handling.
  • STD Size Pistons with Rings. (3.125" diameter cylinder bore.)
    • Cast Piston with Rings. High Quality aftermarket. Replaces Kohler part # 52 875 01-S. $60.00 each, plus shipping & handling.
    • Cast Piston with Rings. OEM Kohler part # 52 874 01-S. $256.90 each, plus shipping & handling.
    • Mahle Piston with Rings. High Quality aftermarket. Replaces Kohler part # 52 875 01-S. $60.00 each, plus shipping & handling.
    • Mahle Piston with Rings. OEM Kohler part # 52 874 01-S. $256.90 each, plus shipping & handling.
  • .010" (.25mm) Oversize Ring Sets Only. (3.135" diameter cylinder bore.)
    • High quality aftermarket. Replaces Kohler part # 52 108 10-S. $30.00 per set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 10-S. $88.35 per set (for one cylinder), plus shipping & handling.
  • .010" (.25mm) Oversize Pistons with Rings. (3.135" diameter cylinder bore.)
    • Cast Piston with Rings. High Quality aftermarket. Replaces Kohler part # 52 875 03-S . $60.00 each, plus shipping & handling.
    • Cast Piston with Rings. OEM Kohler part # 52 874 03-S. $257.15 each, plus shipping & handling.
    • Mahle Piston with Rings. High quality aftermarket. Replaces Kohler part # 52 108 10-S. $30.00 per set (for one cylinder), plus shipping & handling.
    • Mahle Piston with Rings. OEM Kohler part # 52 108 10-S. $88.35 per set (for one cylinder), plus shipping & handling.
  • .020" (.50mm) Oversize Ring Set. (3.145" diameter cylinder bore.)
    • High quality aftermarket. Replaces Kohler part # 52 108 11-S. $40.00 per set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 11-S. $99.40 per set (for one cylinder), plus shipping & handling.
  • .020" (.50mm) Oversize Pistons with Rings. (3.145" diameter cylinder bore.)
    • Cast Piston with Rings. OEM Kohler part # 52 874 04-S. $293.00 each, plus shipping & handling.
    • Mahle Piston with Rings. High Quality aftermarket. Replaces Kohler part # 52 874 04-S. $75.00 each, plus shipping & handling.
    • Mahle Piston with Rings. OEM Kohler part # 52 874 04-S. $293.00 each, plus shipping & handling.
  • .030" (.75mm) Oversize Ring Set. (3.155" diameter cylinder bore.)
    • High quality aftermarket. Replaces discontinued Kohler part # 52 108 12-S. $40.00 per set (for one cylinder), plus shipping & handling.
  • .030" (.75mm) Oversize Pistons with Rings. (3.155" diameter cylinder bore.)
    • Cast Piston with Rings. OEM Kohler part # 52 874 01-S. $355.65 each, plus shipping & handling.
    • Mahle Piston with Rings. High Quality aftermarket. Replaces Kohler part # 52 874 05-S. $75.00 each, plus shipping & handling.
    • Mahle Piston with Rings. OEM Kohler part # 52 874 05-S. $345.50 each, plus shipping & handling.


Ring Sets Only, and Pistons with Rings. Pistons include wrist pin and wire cir-clip retainers. Fits Kohler engine models KT19 Series II, KT21, M20 and MV20. The KT19 Series II, KT21, M20 and MV20 pistons all have the same dimensions, same wrist pin diameter (.7499"-.7501") and same compression height (1.1875"), and all use the same rings. The only difference is the OEM KT19 Series II and KT21 pistons are cast aluminum, and the OEM M20 and MV20 pistons are forged, and made by Mahle. KT19 (first design) pistons with 5/8" wrist pin and 1.1875" compression height no longer available. Priced per cylinder. To maintain engine balance and reduce vibration, two sets of matching oversize piston and rings are required.

  • STD Size Ring Sets Only. (3.125" diameter cylinder bore.)
    • High quality aftermarket. Replaces Kohler part # 52 108 09-S. $30.00 per set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 09-S. $76.90 per set (for one cylinder), plus shipping & handling.
  • STD Size Pistons with Rings. (3.125" diameter cylinder bore.)
    • Cast piston discontinued Kohler part # 52 874 06-S. Not available in aftermarket. L
    • Mahle Piston with Rings. High quality aftermarket. Replaces Kohler part # 52 874 16-S. $75.00 each (for one cylinder), plus shipping & handling.
    • Mahle Piston with Rings. OEM Kohler part # 52 874 16-S. $173.83 each, plus shipping & handling.
  • .010" (.25mm) Oversize Ring Sets Only. (3.135" diameter cylinder bore.)
    • High quality aftermarket. Replaces Kohler part # 52 108 10-S. $30.00 per set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 10-S. $88.35 per set (for one cylinder), plus shipping & handling.
  • .010" (.25mm) Oversize Pistons with Rings. (3.135" cylinder bore.)
    • Cast Piston with Rings. OEM Kohler part # 52 874 08-S. $260.95 each, plus shipping & handling. Not available in aftermarket. L
    • Mahle Piston with Rings. High quality aftermarket. Replaces Kohler part # 52 874 18-S. $75.00 each, plus shipping & handling.
    • Mahle Piston with Rings. OEM Kohler part # 52 874 18-S. $168.53 each, plus shipping & handling.
  • .020" (.50mm) Oversize Ring Set. (3.145" diameter cylinder bore.)
    • High quality aftermarket. Replaces Kohler part # 52 108 11-S. $40.00 per set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 11-S. $99.40 per set (for one cylinder), plus shipping & handling.
  • .020" (.50mm) Oversize Pistons with Rings. (3.145" diameter cylinder bore.)
    • Cast Piston with Rings. OEM Kohler part # 52 874 09-S. $306.70 each, plus shipping & handling. Not available in aftermarket. L
    • Mahle Piston with Rings. High quality aftermarket. Replaces Kohler part # 52 874 19-S. $75.00 each, plus shipping & handling.
    • Mahle Piston with Rings. OEM Kohler part # 52 874 19-S. $163.90 each, plus shipping & handling.
  • .030" (.75mm) Oversize Ring Set Only. (3.155" diameter cylinder bore.)
    • High quality aftermarket. Replaces discontinued Kohler part # 52 108 04-S. $40.00 per set (for one cylinder), plus shipping & handling.
  • .030" (.75mm) Oversize Piston with Rings. (3.155" diameter cylinder bore.)
    • Cast Piston with Rings. Discontinued Kohler part # 52 874 10-S. NOS (New Old Stock). Price depends on source and availability.
    • Mahle Piston with Rings. High quality aftermarket. Replaces discontinued Kohler part # 52 874 20-S. $75.00 each, plus shipping & handling.
5/8" Wrist Pin Retainers. Each fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181, M8, KT17 (first design), KT17 Series II, KT19 (first design), MV16, M18 and MV18.
  • 5/8" Aftermarket Internal Snap Ring. Replaces Kohler part # 230004-S. $1.50/two, plus shipping & handling.
  • 5/8" Wire Cir-Clip. OEM Kohler part # 230004-S. $4.95/two, plus shipping & handling.

3/4" Wrist Pin Retainers. Each fits Kohler engine models KT19 Series II, M20 and MV20.

  • 3/4" Aftermarket Internal Snap Ring. Replaces Kohler part # 52 141 01-S. $2.00/two, plus shipping & handling.
  • 3/4" Wire Cir-Clip. OEM Kohler part # 52 141 01-S. $5.40/two, plus shipping & handling.

7/8" Wrist Pin Retainers. Each fits Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16, K361, K482, K532 and K582.

  • 7/8" Aftermarket Internal Snap Ring. Replaces Kohler part # 47 018 01-S. $2.00/two, plus shipping & handling.
  • 7/8" Wire Cir-Clip. OEM Kohler part # 47 018 01-S. $5.00/two, plus shipping & handling.
NOTE: High-quality ring sets, pistons and piston/rings assemblies are also available for other makes and models of small gas engines. And the piston assemblies that's offered here will work with a stock connecting rod and crankshaft without the need for rebalancing. And always match a billet connecting rod of a certain length to an aftermarket piston (Arias, JE, etc.) that has the correct compression height. These two parts must be matched for the piston to come flush with the top of the engine block, or have a few thousands of an inch pop-out. If using a Kohler connecting rod, the compression height may not be correct with an aftermarket piston (Arias, JE, etc.) that has the wrong wrist pin offset. The same is true with a Kohler piston and a billet connecting rod of a the wrong length. You can find piston ring compressors on eBay.

New and Used OEM and Aftermarket Replacement Connecting Rods - Please contact A-1 Miller's if you're interested in purchasing any of the products or services listed in this website. If you need a part or parts that's not listed in this website, please contact A-1 Miller's and we'll see if we can get it at a reasonable price. | [Top of Page] (Prices are subject to change without notice.)
IMPORTANT! Upon installation of a connecting rod in a Kohler engine, the oil hole in the cap face toward the camshaft! There's "match marks" on both the rod and rod cap. They MUST be aligned or "matched up" so the big end of the rod forms a perfect circle around the crank journal when installed. Otherwise, if the cap is installed backwards, the "perfect circle" will be oblong or "egg-shaped," which will bind on the crank journal. And DO NOT over-tighten the rod bolts or nuts! If the threads strip out in a rod, then perhaps a longer grade 8 fine thread bolt can be installed in reverse to serve as a stud (the rod will need to be machined for head bolt clearance) and use a grade 8 nut. If this cannot be done, then the rod is scrap metal.
Connecting rods. Fits Kohler engine models K90/K91. NOTE: Crank journal must be reground .010" undersize to match this rod. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is started for the first time, apply oil or grease or on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD size for .938" diameter crank journal. (Has numbers 220489 embossed on rod.) Discontinued Kohler part # B-220111-S. NOS (New Old Stock). Price depends on source and availability.
  • .010" undersize for .928" diameter crank journal. This rod is made .010" undersize and not machined or resized to .010" undersize. OEM Kohler part # B-220111-10-S. $69.00 each, plus shipping & handling.
New Connecting Rods. Fits Kohler K-series models K141, K160/K161 cast iron block flathead engines. These are plain aluminum bearing surface rods. Replaceable bearing inserts are not available for these particular rods. 230519 embossed in beam section on OEM Kohler rods. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground so it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is ran for the first time, apply oil or grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD size for 1.1875" diameter crank journal.
    • High quality aftermarket. $46.00 each, plus shipping & handling.
    • OEM Kohler part # B-230039-S and John Deere part # AM31071. $103.70 each, plus shipping & handling.
  • .010" undersize for 1.1775" diameter crank journal. These rod are made .010" undersize and not machined or resized to .010" undersize. Crank journal must be reground .010" undersize to match this rod.
    • High quality aftermarket. $46.00 each, plus shipping & handling.
    • OEM Kohler part # B-230039-10-S. $78.10 each, plus shipping & handling.
New Connecting Rods. Fits Kohler K-series and Magnum models L181, K181 and M8 cast iron block flathead engines. These are plain aluminum bearing surface rods. Replaceable bearing inserts are not available for these particular rods. NOTE - The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is ran for the first time, apply oil or grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD size for 1.1875" diameter crank journal. For "old style" K-series cast piston with wide wrist pin hole.
    • High quality aftermarket. Replaces Kohler part # 41 067 10-S. $37.00 each, plus shipping & handling.
    • OEM Kohler part # 41 067 10-S and John Deere part # AM31062. $66.10 each, plus shipping & handling.
  • .010" undersize for 1.1775" diameter crank journal. These rods are made .010" undersize and not machined or resized to .010" undersize. For "old style" K-series cast piston with wide wrist pin hole.
    • High quality aftermarket. Replaces Kohler part # 41 067 11-S. $44.00 each, plus shipping & handling.
    • OEM Kohler part # 41 067 11-S and John Deere part # AM103292. $84.30 each, plus shipping & handling.
  • For "new style" (Magnum) Mahle forged piston with wide wrist pin hole. (Strong rods.)
    • STD size for 1.1875" diameter crank journal. OEM Kohler part # 41 067 08-S. $91.20 each, plus shipping & handling.
    • .010" undersize for 1.1775" diameter crank journal. This rod is made .010" undersize and not machined or resized to .010" undersize. OEM Kohler part # 41 067 09-S. $91.20 each, plus shipping & handling.
New Connecting Rods. Fits Kohler K-series and Magnum engine models K241 and M10. Strong rods. Comes with long dipper. 5.558" length. NOTE - These rods can be bored for installation of bearing inserts, and crank journal must be reground to match diameter of undersize bearing inserts. Crank journal must be reground .010" undersize to match this rod. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. Bearing inserts cannot be used. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is ran for the first time, apply oil or grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • A-1 Miller's Professional Repair Service - Bore YOUR Kohler scored or burnt connecting rod(s) and install replaceable lead-coated STD size, .010", .020", .030" undersize bearing inserts for a matching reground undersize crank journal. Or install borable bronze-coated .060" bearing inserts, which can be bored and finish-honed [in the connecting rod] for a .040" or .050" undersize crank journal, or with a .060" undersize crank journal for a matching reground undersize crank journal. No need to purchase a new undersize rod. $50.00 - $100.00 for labor and bearing inserts, plus return shipping & handling. A-1 Miller's professional crankshaft rod journal regrinding service also available.
  • STD size for 1.500" diameter crank journal.
    • High quality aftermarket. Replaces Kohler part # 47 067 13-S and John Deere part # AM103546. Has long integrated dipper for deep oil pan; cut half off for narrow, flat bottom oil pan. $44.00 each, plus shipping & handling.
    • OEM Kohler part # 47 067 11-S. Has short integrated dipper for narrow, flat bottom oil pan. $130.40 each, plus shipping & handling.
  • .010" undersize for 1.490" diameter crank journal. (Has hole drilled through beam section.) High quality aftermarket. This rod is made .010" undersize and not machined or resized to .010" undersize. Has long integrated dipper for deep oil pan; cut half off for narrow, flat bottom oil pan. Crank journal must be reground .010" undersize to match this rod. Replaces discontinued Kohler part # 47 067 12-S and John Deere part # AM37715. $48.00 each, plus shipping & handling.
  • .020" undersize for 1.480" diameter crank journal. This rod is made .020" undersize and not machined or resized to .020" undersize. Has long integrated dipper for deep oil pan; cut half off for narrow, flat bottom oil pan. Crank journal must be reground .020" undersize to match this rod. Irrelevant Kohler or John Deere part numbers. $50.00 each, plus shipping & handling.
New Connecting Rods. Fits Kohler K-series and Magnum models K301, M12, K321 and M14 cast iron block flathead engines. Comes with long dipper. 5.3" length. NOTE - These rods can be bored for installation of bearing inserts, and crank journal must be reground to match diameter of undersize bearing inserts. Crank journal must be reground .010" undersize to match this rod. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. Bearing inserts cannot be used. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is ran for the first time, apply oil or grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • A-1 Miller's Professional Repair Service - Bore YOUR Kohler scored or burnt connecting rod(s) and install replaceable lead-coated STD size, .010", .020", .030" undersize bearing inserts for a matching reground undersize crank journal. Or install borable bronze-coated .060" bearing inserts, which can be bored and finish-honed [in the connecting rod] for a .040" or .050" undersize crank journal, or with a .060" undersize crank journal for a matching reground undersize crank journal. No need to purchase a new undersize rod. $50.00 - $100.00 for labor and bearing inserts, plus return shipping & handling. A-1 Miller's professional crankshaft rod journal regrinding service also available.
  • STD size for 1.500" diameter crank journal.
    • High quality aftermarket. For "old style" K-series cast piston with wide wrist pin hole. Replaces discontinued Kohler part # 47 067 09-S and John Deere part # AM106441. $48.00 each, plus shipping & handling.
    • High quality aftermarket. Same as above except has narrow wrist pin hole for "new style" (Magnum) Mahle forged piston. $58.00 each, plus shipping & handling.
    • "New Style" K-series and Magnum connecting rod. This particular forged rod has a beefier and thicker beam section, which makes it just as durable as a machined billet rod, and with bearing inserts installed, it's suitable for high RPM and open RPM engine operation. Discontinued Kohler part # 45 067 24-S and John Deere part # AM106441. NOS (New Old Stock). Price depends on source and availability.
  • .010" undersize for 1.490" diameter crank journal. (Has hole drilled through beam section.) The rods listed below are made .010" undersize and not machined or resized to .010" undersize. Crank journal must be reground .010" undersize to match these rods.
    • High quality aftermarket. For "old style" K-series cast piston with wide wrist pin hole. Replaces discontinued Kohler part # 47 067 10-S. $48.00 each, plus shipping & handling.
    • High quality aftermarket. Same as above except has narrow wrist pin hole for "new style" (Magnum) Mahle forged piston. $58.00 each, plus shipping & handling.
    • "New Style" K-series and Magnum connecting rod. This particular forged rod has a beefier and thicker beam section, which makes it just as durable as a machined billet rod, and with bearing inserts installed, it's suitable for high RPM and open RPM engine operation. OEM Kohler part # 45 067 25-S and John Deere part # AM106832. $204.80 each, plus shipping & handling.
  • .020" undersize for 1.480" diameter crank journal. The rods listed below are made .020" undersize and not machined or resized to .020" undersize. Irrelevant Kohler or John Deere part numbers.
    • High quality aftermarket. For "old style" K-series cast piston with wide wrist pin hole. $50.00 each, plus shipping & handling.
    • High quality aftermarket. Same as above except has narrow wrist pin hole for "new style" (Magnum) Mahle forged piston. $65.00 each, plus shipping & handling.
New Connecting Rods. Fits Kohler K-series and Magnum K341 and M16 cast iron block engines. These rods have a narrow wrist pin hole. Comes with long dipper. 5.3" length. NOTE - All 16hp rods, K-series or Magnum, have a narrow wrist pin hole. Also, these rods can be bored for installation of bearing inserts, and crank journal must be reground to match diameter of undersize bearing inserts. Crank journal must be reground .010" undersize to match this rod. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. Bearing inserts cannot be used. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is ran for the first time, apply oil or grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • A-1 Miller's Professional Repair Service - Bore YOUR Kohler scored or burnt connecting rod(s) and install replaceable lead-coated STD size, .010", .020", .030" undersize bearing inserts for a matching reground undersize crank journal. Or install borable bronze-coated .060" bearing inserts, which can be bored and finish-honed [in the connecting rod] for a .040" or .050" undersize crank journal, or with a .060" undersize crank journal for a matching reground undersize crank journal. No need to purchase a new undersize rod. $50.00 - $100.00 for labor and bearing inserts, plus return shipping & handling. A-1 Miller's professional crankshaft rod journal regrinding service also available.
  • STD size for 1.500" diameter crank journal.
    • High quality aftermarket K-series rod. Replaces discontinued Kohler part # 45 067 22-S and John Deere part # 102766. $58.00 each, plus shipping & handling.
    • K-series and Magnum "new style" rod. This particular forged rod has a thicker beam section, which makes it just as durable as a machined billet rod, and with bearing inserts installed, it's suitable for high RPM and wide open throttle engine operation. And when used with a factory type piston with a thin-wall wrist pin, the rotating assembly will not need to be rebalanced. OEM Kohler part # 45 067 24-S and John Deere part # AM106441. $124.50 each, plus shipping & handling. Return To Previous Paragraph È
  • .010" undersize for 1.490" diameter crank journal. (Has hole drilled through beam section.) The rods listed below are made .010" undersize and not machined or resized to .010" undersize. Crank journal must be reground .010" undersize to match these rods.
    • High quality aftermarket K-series rod. Replaces discontinued Kohler part # 45 067 23-S and John Deere part # AM102767. $58.00 each, plus shipping & handling.
    • K-series and Magnum "new style" rod. This particular forged rod has a thicker beam section, which makes it just as durable as a machined billet rod, and with bearing inserts installed, it's suitable for high RPM and wide open throttle engine operation. And when used with a factory type piston, the rotating assembly will not need to be rebalanced. OEM Kohler part # 45 067 25-S and John Deere part # AM6632. $173.85 each, plus shipping & handling.
  • .020" undersize for 1.480" diameter crank journal. This rod is made .020" undersize and not machined or resized to .020" undersize. Irrelevant Kohler or John Deere part numbers. $65.00 each, plus shipping & handling.
ALCOA Connecting Rods. Designed for Kohler engine model K361, but will fit Kohler engine models K301, M12, K321, M14, K341 and M16 flathead engines. Extremely strong rods. These rods have a narrow wrist pin hole for the (Magnum) Mahle, K341 and K361 pistons. Comes with long dipper. 5.3" length. NOTE: These rods can be bored for installation of STD size, .010", .020",or .030" undersize bearing inserts, and crank journal must be reground to match diameter of undersize bearing inserts. Crank journal must be reground .010" undersize to match this rod. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. Bearing inserts cannot be used. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is started for the first time, apply oil or grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • A-1 Miller's Professional Repair Service - Bore YOUR Kohler scored or burnt connecting rod(s) and install replaceable lead-coated STD size, .010", .020", .030" undersize bearing inserts for a matching reground undersize crank journal. Or install borable bronze-coated .060" bearing inserts, which can be bored and finish-honed [in the connecting rod] for a .040" or .050" undersize crank journal, or with a .060" undersize crank journal for a matching reground undersize crank journal. No need to purchase a new undersize rod. $50.00 - $100.00 for labor and bearing inserts, plus return shipping & handling. A-1 Miller's professional crankshaft rod journal regrinding service also available.
  • STD size for 1.500" diameter crank journal. Discontinued Kohler part # 45 067 15-S. NOS (New Old Stock). Price depends on source and availability.
  • .010" undersize for 1.490" diameter crank journal. (Has hole drilled through beam section.) Crank journal must be reground .010" undersize to match this rod. Discontinued Kohler part # 45 067 17-S. NOS (New Old Stock). Price depends on source and availability.
New Connecting Rods. Fits Kohler engine models MV16, KT17 (first design), KT17 Series II, M18, MV18. Wrist pin hole diameter is .625". Bearing inserts are not available for these rods. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD size rod. Fits 1.3733"-1.3738" diameter crank journal.
    • High quality aftermarket. $50.00 each, plus shipping & handling.
    • OEM Kohler part # 52 067 67-S. $119.70 each, plus shipping & handling.
  • .010" undersize rod. Fits 1.3633"-1.3638" diameter crank journal. The rods listed below are made .010" undersize and not machined or resized to .010" undersize. Crank journal must be reground .010" undersize to match this rod.
    • High quality aftermarket. $50.00 each, plus shipping & handling.
    • OEM Kohler part # 52 067 68-S. $150.00 each, plus shipping & handling.
  • .020" undersize rod. Fits 1.3533"-1.3538" diameter crank journal. This rod is made .020" undersize and not machined or resized to .020" undersize. Crank journals must be reground .020" undersize to match this rod. High quality aftermarket. $75.00 each, plus shipping & handling.


New Connecting Rods. Fits Kohler engine models KT19 Series II, KT21, M20 and MV20. Wrist pin hole diameter is .750". The rods listed below will not fit the KT19 (first design) engine, and the KT19 (first design) rods are no longer available from any source. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • A-1 Miller's Professional Repair Service - Bore YOUR Kohler scored or burnt connecting rod(s) and install replaceable lead-coated STD size, .010", .020", .030" undersize bearing inserts for a matching reground undersize crank journal. Or install borable bronze-coated .060" bearing inserts, which can be bored and finish-honed [in the connecting rod] for a .040" or .050" undersize crank journal, or with a .060" undersize crank journal for a matching reground undersize crank journal. No need to purchase a new undersize rod. $50.00 - $100.00 for labor and bearing inserts, plus return shipping & handling. A-1 Miller's professional crankshaft rod journal regrinding service also available.
  • STD size rod. Fits 1.4993"-1.4998" diameter crank journal. High quality aftermarket. Replaces discontinued Kohler part # 52 067 71-S. $75.00 each, plus shipping & handling.
  • .010" undersize rod. Fits 1.4893"-1.4898" diameter crank journal. This rod is made .010" undersize and not machined or resized to .010" undersize. Crank journal must be reground .010" undersize to match this rod. High quality aftermarket. Replaces discontinued Kohler part # 52 067 72-S. $75.00 each, plus shipping & handling.
  • .020" undersize rod. Fits 1.4793"-1.4798" diameter crank journal. This rod is made .020" undersize and not machined or resized to .020" undersize. Crank journals must be reground .020" undersize to match this rod. High quality aftermarket. $75.00 each, plus shipping & handling.
STD size, .010", .020" or .030" (hard to find now) undersize Replaceable Tri-Metal (Lead Alloy/Copper/Steel) Bearing Inserts in Connecting Rods for Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16, K361 M20 and MV20. Click here to learn how bearing inserts protect an engine. Rods for the before mentioned engines can be bored and notched to accept bearing inserts. Even severely burnt, scored, or rods with a mismatched cap can be bored for installation of bearing inserts. Only USA-made Clevite 77, Federal Mogul or Sealed Power bearing inserts will be installed. No low quality Chinese-made bearing inserts ever installed. All A-1 Miller's Professional Machined connecting rods include ground-out notches to prevent bearing rotation in rod and drilled oil hole for proper lubrication. Please indicate diameter of crank journal for size of bearing inserts. (STD size, .010", .020", .030" or resizable .060" undersizes.) Also, rods can be center-bored for top of piston to come flush with deck, or bored .020" offset for a .020"± piston pop-out at no extra charge. [Return To Previous Paragraph, Web Site or Section]
  • Clevite 77, Federal Mogul or Sealed Power Bearing Inserts. Available in STD size, .010", .020", .030" and resizable .060" (limited supply) undersizes. $20.00 each, plus shipping & handling.
  • Bore and notch your rod only (customer supply and install own bearing inserts): $25.00 labor, plus return shipping & handling.
  • Bore and notch your rod and install our bearing inserts: $45.00 ($20.00 for bearing inserts + $25.00 labor to bore rod), plus return shipping & handling.
  • Purchase one of our rods, bore and notch rod and install our bearing inserts: Price of rod $? + $20.00 for bearing inserts + $25.00 labor to bore rod = $? total, plus return shipping & handling.
  • A-1 Miller's professional crankshaft rod journal regrinding service also available.

NOTE: If a crank journal is worn beyond specs or badly scored/burnt,it will need to be reground to the next undersize to match the appropriate size bearing inserts. And if you wish to have A-1 Miller's to bore a rod for you, please let me know if you want the bearing insert centered in the bore of the rod (5.300" rod length; piston flush with top of block), offset .020" (5.320" rod length; safe to use with a milled OEM Kohler stock head and stock head gasket) or offset .060" (5.360" rod length; use with a non-milled OEM Kohler head and stock head gasket) to pop the piston out of the cylinder (see below Ê) to raise the compression and help improve airflow within the combustion chamber for more power and torque. The bearing inserts A-1 Miller's install in Kohler 10-16hp flatheads and 18hp OHV K361 connecting rods can be used for general lawn and garden use, stock or high RPM competition pulling engines. The rod will need to be bored exactly 1.625" for correct bearing to journal oil clearance.

NOTE: Being virtually all Kohler K241 and M10 pistons come within .020"± from the top of the block, which lowers the compression ratio. (The factory made them this way for reasons unknown.) A-1 Miller's prefer to bore the K241 10hp rods .020" offset so the piston will come flush with the top of the block. This will allow the engine to produce a little more power. It won't effect the longevity of the engine or cause any problems whatsoever. But sometimes with the .020" offset, the piston will pop out of the cylinder a few thousandths of an inch, which will still hurt nothing. And the bore can be offset .040" for a .020"± piston pop-out.

FYI - Before A-1 Miller's machine a rod for installation of bearing inserts, we use a metal "plug" alignment tool that we fabricated to precisely align the big hole of the connecting rod with the centerline of the spindle in my milling machine. Then while the plug is in the rod, we firmly clamp the rod to the milling machine table and after leaving the big hole centered or moving the table so many thousandths of an inch offset for piston pop-out, we lock the table so it won't move in any direction while boring the rod. But for reasons unknown, sometimes the cutting tool will bore the hole in the rod slightly off-center toward one of the bolts or studs. When this happens, we simply grind a small notch on the outside of each bearing shell so they'll clear the rod bolt. I've talked to other machinists who bore Kohler rods also about this and they tell A-1 Miller's sometimes the same thing happens to their rods. But as long as the outside of the bearing shells are notched for clearance of the bolt or stud, the off-center of the bearing inserts poses no problems whatsoever.

And bearing inserts for the 10-16hp Kohler engines can be installed in Kohler engine models K482, K532 and K582 STD size connecting rods, but the crank journals would need to be reground exactly to 1.500" to match the inside diameter of the bearing inserts when installed in the rods. And for your information, STD size crank journals for the K482, K532 and K582 engines measures 1.6245".

Crankshaft Main Bearings (Flanged Sleeve Bushings). Fits Kohler opposed twin cylinder engine models MV16, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18 MV18, M20 and MV20. NOTE: With these engines, if one main journal is worn beyond specs (mostly likely the PTO end due to metal/dirt/debris contamination in the oil because of infrequent oil changes and/or lack of an oil filter), it can be reground undersize, and if the other main journal (most likely the flywheel end) measures within specs (1.742"), it can remain STD size. Remember - metal flake looks good in paint, not in oil. [Return To Previous Paragraph, Web Site or Section]
  • Used and in excellent, unworn condition. STD size. (1.7407") OEM Kohler part # 52 030 10-S. $40.00 each, plus shipping & handling.
  • New. STD size. (1.7407") OEM Kohler part # 52 030 10-S. $95.80 each, plus shipping & handling.
  • New. .010" undersize. (1.7307") OEM Kohler part # 52 030 11-S. $191.00 each, plus shipping & handling.
  • New. .020" undersize. (1.7207") OEM Kohler part # 52 030 12-S. $191.00 each, plus shipping & handling.
High Quality 8 Ball Main Crankshaft Radial Bearings. Fits Kohler K-series and Magnum cast iron block engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361. Heat treated chrome steel (AISI 52100) for higher resistance and durability. Supports up to 17,000 RPM. Works excellent for general lawn and garden engines or for high performance competition pulling engines that run at high RPM or at wide open throttle. FYI - The 8 ball roller bearings have larger diameter balls than the aftermarket 12 ball roller bearings, that have smaller balls. Therefore, the balls in the 8 ball bearings rotate slower, causing less friction. They run freer and more cooler. In theory, it seems that the 12 ball bearings would work better in an open throttle pulling engine, but in reality, it's a different story. Dimensions: 1.57" (40mm) I.D. x 3.54" O.D. (90mm) x .90" (23mm) width. See note below Ê. NOTE: If your bearing(s) have more than .005" of play due to wear, or it feels rough or "rubbles" when rotated by hand with motor oil applied, then it should be replaced. FYI - All US and import manufacturers of ball bearings have always been made them to the metric dimensions. Where applicable, the manufacturers try to make them close as possible to the inch dimensions. [Return To Previous Paragraph, Web Site or Section]
  • Used and in excellent condition. OEM Kohler bearing with very little to no wear. OEM Kohler part # 235376-S. $5.00 each, plus shipping & handling. (When available.)
  • New high quality aftermarket. A-1 Miller's part #150973. Replaces Kohler part # 235376-S. $22.00 each, plus shipping & handling.
  • New. OEM Kohler part # 235376-S. $116.55 each, plus shipping & handling.
More parts to be added later.

Valve Seat Cutter Tool Kits | Please contact A-1 Miller's if you're interested in purchasing any of the products or services listed in this website. If you need a part or parts that's not listed in this website, please contact A-1 Miller's and we'll see if we can get it at a reasonable price. (Prices are subject to change without notice.) [Top of Page]
Basic Small Engine Valve Seat Cutter Kit.

This basic small engine valve seat cutting kit by Neway Manufacturing will make it so you can perform professional valve jobs to restore full compression so the engine will start quicker, idle smoothly, rev up with no hesitation, produce lots of power, and run for a long time without stalling or dying (when the ignition timing and carburetor adjustments are set correctly, too). Easy to use with accurate results. This kit contains everything to recondition vintage small engine's 31º and 46º angle valve seats. The cutter angles are 31º and 46º, which allows an interference angle that provides a better seal for 30º and 45º angle valve faces. Adjustable carbide steel cutters for small and large diameter valve seats. Contact A-1 Miller's if you have any questions about using this tool. Part # LG 1000. $250.00 each, plus shipping & handling. [Return To Previous Paragraph, Section or Website]

This Kit Includes:

  • CU102 : Small Series Valve Seat Cutter 33.3mm 31x46 degrees.
  • PF100-1_4 : 1/4" Small Series Solid Valve Guide Pilot
  • PF100-1_4+1 : 1/4" + .001" Small Series Solid Valve Guide Pilot
  • PF100-9_32 : 9/32" Small Series Solid Valve Guide Pilot
  • PF100-5_16 : 5/16" Small Series Solid Valve Guide Pilot
  • PF100-5_16+1 : 5/16" + .001" Small Series Solid Valve Guide Pilot
  • PM100-8.0mm : 8mm Small Series Solid Valve Guide Pilot
  • TW513 : 3/8" Hex Nylon Fiber T-Wrench
  • CB267 : Cleaning Brush
  • HK240 : 5/64" Hex Key
  • HK332 : 3/32" Hex Key
  • PPP245 : Pilot Puller Pin
  • CA303 : 3 Cutter Tool Case
Deluxe Small Engine Valve Seat Cutter Kit.

This deluxe small engine valve seat cutting kit by Neway Manufacturing will make it so you can perform professional valve jobs to restore full compression so the engine will start quicker, idle smoothly, rev up with no hesitation, produce lots of power, and run for a long time without stalling or dying (when the ignition timing and carburetor adjustments are set correctly, too). Easy to use with accurate results. This kit contains everything to recondition vintage small engine's 31º and 46º angle valve seats. The additional angle cutters will help restore very worn valve seats to proper condition. The cutter angles are 31º and 46º, which allows an interference angle that provides a better seal for 30º and 45º angle valve faces. The additional 15º and 60º cutters will allow to adjust the contact area between a worn valve seat with the valve face. Adjustable carbide steel cutters for small and large diameter valve seats. Contact A-1 Miller's if you have any questions about using this tool. Part # LG 2010. $350.00 each, plus shipping & handling.

This Kit Contains:

  • CU102 : Small Series Valve Seat Cutter 33.3mm 31x46 degrees.
  • CU124 : Small Series Valve Seat Cutter 33.3mm 15x60 degrees.
  • PF100-1_4 : 1/4" Small Series Solid Valve Guide Pilot
  • PF100-1_4+1 : 1/4" + .001" Small Series Solid Valve Guide Pilot
  • PF100-9_32 : 9/32" Small Series Solid Valve Guide Pilot
  • PF100-5_16 : 5/16" Small Series Solid Valve Guide Pilot
  • PF100-5_16+1 : 5/16" + .001" Small Series Solid Valve Guide Pilot
  • PM100-8.0mm : 8mm Small Series Solid Valve Guide Pilot
  • TW513 : 3/8" Hex Nylon Fiber T-Wrench
  • CB267 : Cleaning Brush
  • HK240 : 5/64" Hex Key
  • HK332 : 3/32" Hex Key
  • PPP245 : Pilot Puller Pin
  • CA303 : 3 Cutter Tool Case
OEM Size and Oversize Valves | Please contact A-1 Miller's if you're interested in purchasing any of the products or services listed in this website. If you need a part or parts that's not listed in this website, please contact A-1 Miller's and we'll see if we can get it at a reasonable price. (Prices are subject to change without notice.) [Top of Page]
Intake Valve. Fits Kohler engine models KT90/KT91. Head diameter: 15/16". Discontinued Kohler part # 220008-S. NOS (New Old Stock). Price depends on source and availability.

Exhaust Valve. Fits Kohler engine models KT90/KT91. OEM Kohler part # 220009-S. $60.55 each, plus shipping & handling.

NOTE: Before lapping in valves, it's best to have the valve seats recut or reground so they'll be in correct alignment with the centerline of the valve guides. Otherwise, the valves may not make a full 360º contact with the seats, resulting in leakage and the engine will lose compression, be hard to start, lose power and possibly make a popping sound through the carburetor or out the exhaust at idle speed. And be sure to set the clearances correctly, too. And if the end of the valve stem is accidentally ground too short, it can be made long again by building up welding with a MIG or TIG welder, then ground to the correct valve clearance.


Exhaust Valves. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8. Dimensions: head diameter: 1-1/8"; overall length: 4.056"; stem diameter: .309"; 45º face angle.

  • High quality aftermarket ordinary long lasting exhaust valve. $20.00 each, plus shipping & handling.
  • OEM Kohler ordinary long lasting exhaust valve, part # 230710-S. $41.56 each, plus shipping & handling.
  • OEM Kohler Stellite exhaust valve (extremely hard and long lasting material; maintains valve to stem clearance longer), part # 230027-S. $87.36 each, plus shipping & handling.
  • Reground Exhaust Valve, used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)


Intake Valves. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8. Dimensions: head diameter: 1-3/8"; overall length: 4.065"; stem diameter: .309"; 45º face angle.

  • Reground ordinary long lasting intake valve. In excellent condition. Discontinued Kohler part # 230008-S. $25.00 each, plus shipping & handling. (When available.)
  • OEM Kohler Stellite intake valve (extremely hard and long lasting material; maintains valve to stem clearance longer), part # 230582-S. $86.23 each, plus shipping & handling.
  • Reground Intake Valve, used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)
  • Grind 30º angle on intake valve face to improve engine performance or for high performance use. (Seat must be recut or reground at a 31º angle to match angle on valve face.) $5.00 extra.


5/16" (.3125") Chucking Reamer. Use to clean carbon deposits from used valve guides or enlarge new guides after installing after installing for a 5/16" valve stem in flathead 7hp+ B&S, Kohler, 8hp+ Tecumseh, etc. engines. $20.00 each, plus shipping & handling.


NOTE: Before lapping in valves, it's best to have the valve seats recut or reground so they'll be in correct alignment with the centerline of the valve guides. Otherwise, the valves may not make a full 360º contact with the seats, resulting in leakage and the engine will lose compression, be hard to start, lose power and possibly make a popping sound through the carburetor or out the exhaust at idle speed. And be sure to set the clearances correctly, too. And if the end of the valve stem is accidentally ground too short, it can be made long again by building up welding with a MIG or TIG welder, then ground to the correct valve clearance.


1-1/8" Diameter Exhaust Valves. Fits Kohler engine models K241, M10, K301, M12, early K321's, K482, K532 and K582. Dimensions - Head diameter: 1-1/8"; Length: 4.656"; Stem diameter: .309"; Face angle: 45º.

  • High quality aftermarket ordinary long lasting exhaust valve. Replaces Kohler part # 235826-S. $16.00 each, plus shipping & handling.
  • OEM Kohler ordinary long lasting exhaust valve, part # 235826-S. $41.56 each, plus shipping & handling.
  • High quality aftermarket Stellite exhaust valve (extremely hard and long lasting material; less prone to wear, burning, and maintains valve to stem clearance longer). Replaces Kohler part # 235838-S. $26.00 each, plus shipping & handling.
  • OEM Kohler Stellite exhaust valve (extremely hard and long lasting material; less prone to wear, burning, and maintains valve to stem clearance longer), part # 235838-S. $67.09 each, plus shipping & handling.
  • OEM Kohler Stellite exhaust valve (extremely hard and long lasting material; less prone to wear, burning, and maintains valve to stem clearance longer), part # 48 016 01-S. $79.12 each, plus shipping & handling.
  • Reground Exhaust Valve, used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)


1-3/8" Diameter Intake Valves. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16, K482, K532 and K582. Dimensions - Head diameter: 1-3/8"; Length: 4.640"; Stem diameter: .3095"; Face angle: 45º.

  • High quality aftermarket ordinary long lasting intake valve. Replaces Kohler part # 235008-S. $26.00 each, plus shipping & handling.
  • High quality aftermarket Stellite intake valve (extremely hard and long lasting material; maintains valve to stem clearance longer). Replaces Kohler part # 235582-S. $26.00 each, plus shipping & handling.
  • OEM Kohler ordinary long lasting intake valve, part # 235008-S. $47.48 each, plus shipping & handling.
  • OEM Kohler Stellite intake valve (extremely hard and long lasting material; maintains valve to stem clearance longer), part # 235582-S. $95.63 each, plus shipping & handling.
  • Reground Intake Valve, used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)
  • Grind 30º angle on intake valve face to improve engine performance or for high performance use. (Seat must be recut or reground at a 31º angle to match angle on valve face.) $5.00 extra.


1-3/8" Diameter Exhaust Valves for later model K321's, M14 (suffix "D" and later), K341, M16, K532 and K582 (for K582 after serial # 9165450). Dimensions - Head diameter: 1.373; Length: 4.639; Stem diameter: .3075; Face Angle: 45º.

  • High quality aftermarket Stellite exhaust valve (extremely hard and long lasting material; less prone to wear, burning, and maintains valve to stem clearance longer). Replaces Kohler part # 237672-S. $26.00 each, plus shipping & handling.
  • OEM Kohler Stellite exhaust valve (extremely hard and long lasting material; less prone to wear, burning, and maintains valve to stem clearance longer), part # 237672-S. $67.09 each, plus shipping & handling.
  • Reground Exhaust Valve, used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)

NOTE: Before lapping in valves, it's best to have the valve seats recut or reground so they'll be in correct alignment with the centerline of the valve guides. Otherwise, the valves may not make a full 360º contact with the seats, resulting in leakage and the engine will lose compression, be hard to start, lose power and possibly make a popping sound through the carburetor or out the exhaust at idle speed. And be sure to set the clearances correctly, too. And if the end of the valve stem is accidentally ground too short, it can be made long again by building up welding with a MIG or TIG welder, then ground to the correct valve clearance.


5/16" (.3125") Chucking Reamer. Use to clean carbon deposits from used valve guides or enlarge new guides after installing for a 5/16" valve stem in flathead 7hp+ B&S, Kohler, 8hp+ Tecumseh, etc. engines. $20.00 each, plus shipping & handling.

8mm (.315") Chucking Reamer. Use to enlarge valve guides for installation of oversize or aftermarket valves with an 8mm valve stem in Kohler engine models K361, KT19 (first design), KT19 Series II, KT21, M20 and MV20, or 1.720" oversize valve in 10-16hp Kohler engines. $20.00 each, plus shipping & handling.


High Quality Aftermarket K361 Intake and Exhaust Valve. Made of extremely hardened, heat-treated, long-lasting material. Can be used as intake or exhaust valve. Dimensions: head diameter: 1.437"; overall length: 4.165"±; face angle: 45º. Has 8mm chrome-plated stem. Requires 8mm reamer to enlarge guide. OEM Kohler valve keepers/locks/collets and retainer or rotator and springs can be used with this valve. OEM valve Replaces discontinued Kohler part #'s 45 016 02-S (intake) and 45 017 01-S (exhaust).

  • Machined by A-1 Miller's. $50.00 each, plus shipping & handling.


8mm Chucking Reamer. Use to enlarge valve guides for installation of aftermarket valves with an 8mm valve stem in Kohler engine models K361, KT19 (first design), KT19 Series II, KT21, M20 and MV20, or 1.720" oversize valve in 10-16hp Kohler engines. $20.00 each, plus shipping & handling.

NOTE: Before lapping in valves, it's best to have the valve seats recut or reground so they'll be in correct alignment with the centerline of the valve guides. Otherwise, the valves may not make a full 360º contact with the seats, resulting in leakage and the engine will lose compression, be hard to start, lose power and possibly make a popping sound through the carburetor or out the exhaust at idle speed. And be sure to set the clearances correctly, too. And if the end of the valve stem is accidentally ground too short, it can be made long again by building up welding with a MIG or TIG welder, then ground to the correct valve clearance.


Intake Valves. Each valve listed below fits Kohler engine models KT17 (first design), KT17 Series II, MV16, M18 and MV18. Replaces discontinued Kohler part #'s 52 016 05-S (listed for M18, MV18), 52 017 01-S (listed for KT17), 52 017 02-S (listed for KT17), 52 017 03-S (listed for KT17), 52 017 05-S (listed for KT17), 52 017 07-S (listed for MV16, M18) and 52 017-08-S (listed for MV16, M18). Overall length: 3.641".

  • A-1 Miller's High Quality Aftermarket Intake Valve. Fits Kohler engine models KT17 (first design), KT17 Series II, MV16, M18 and MV18. 45º face angle, 8mm diameter stem; requires 8mm reamer to enlarge guide. OEM Kohler valve keepers/locks/collets and retainers can be used with this valve. $30.00 each, plus shipping & handling.
  • High Quality "Made in China" Kohler-Replicated Intake Valve. Fits Kohler engine models KT17 (first design), KT17 Series II, MV16, M18 and MV18. 45º face angle for engines with serial number 1816500646 and earlier. 5/16" diameter stem. $50.00 each, plus shipping & handling.

Exhaust Valves. Each valve listed below fits Kohler engine models KT17 (first design), KT17 Series II, MV16, M18 and MV18. Dimensions: head diameter: 1.373"; overall length: 3.641"; stem diameter: .3075".

  • High Quality Kohler-Replicated "Made in China" Exhaust Valve. Has a 45º face angle, but can be reground to 30º to match the 31º seat angle. 5/16" diameter stem. Replaces Kohler part # 52 016 05-S. $30.00 each, plus shipping & handling.
  • OEM Kohler Exhaust Valve for Kohler engine models M18 and MV18. Has a 30º face angle for engines after serial number 1917809286. OEM Kohler part # 52 016 05-S. $63.40 each, plus shipping & handling.


Intake Valves. Fits Kohler engine models KT19 (first design), KT19 Series II, KT21, M20 and MV20. Replaces discontinued Kohler part #'s 52 016 02-S, 52 017 03 (listed for KT19), 52 017 07-S, 52 017 08-S. Overall length: 3.926".

  • A-1 Miller's High Quality Aftermarket Intake Valve. Fits Kohler engine models KT19 (first design), KT19 Series II, and early M20 and MV20. 45º face angle. This valve can be used for the intake or exhaust to match a 46º seat, if desired. Has an 8mm diameter stem; requires 8mm reamer to enlarge guide. OEM Kohler valve keepers/locks/collets and retainers can be used with this valve. $30.00 each, plus shipping & handling.
  • High Quality Kohler-Replicated "Made in China" Intake Valve. Fits Kohler engine models M20 and MV20. 30º valve face; 5/16" diameter stem. $30.00 each, plus shipping & handling.

Exhaust Valves. Fits Kohler engine models KT19 (first design), KT19 Series II, KT21, M20 and MV20. Replaces discontinued Kohler part #'s 52 016 02-S, 52 017 03, 52 017 07-S, 52 017 08-S. Overall length: 3.926".

  • A-1 Miller's High Quality Aftermarket Exhaust Valve. Fits Kohler engine models KT19 (first design), KT19 series II, and early M20 and MV20. 45º face angle; 8mm diameter stem; requires 8mm reamer to enlarge guide. $30.00 each, plus shipping & handling.
  • High Quality Kohler-Replicated "Made in China" Exhaust Valve. Fits Kohler engine models M20 and MV20 with serial number 1917809296 and above. 30º face angle; 5/16" diameter stem. Replaces Kohler part # 52 017 07-S. $30.00 each, plus shipping & handling.


8mm Chucking Reamer. Use to enlarge valve guides for installation of aftermarket valves with an 8mm valve stem in Kohler engine models K361, KT19 (first design), KT19 Series II, KT21, M20 and MV20, or 1.720" oversize valve in 10-16hp Kohler engines. $20.00 each, plus shipping & handling.

NOTE: Before lapping in valves, it's best to have the valve seats recut or reground so they'll be in correct alignment with the centerline of the valve guides. Otherwise, the valves may not make a full 360º contact with the seats, resulting in leakage and the engine will lose compression, be hard to start, lose power and possibly make a popping sound through the carburetor or out the exhaust at idle speed. And be sure to set the clearances correctly, too. And if the end of the valve stem is accidentally ground too short, it can be made long again by building up welding with a MIG or TIG welder, then ground to the correct valve clearance.


Oversize Valves for High RPM Kohler Pulling Engines. Each can be used as intake valve for Kohler 10-16hp competition pulling engines, or as exhaust valve (with a 20%± bigger intake valve). Each have a 45º face angle for a 46º seat, but can be reground to 30º to match a 31º seat. OEM Kohler valve keepers/locks/collets and retainers can be used with these valves.

  • 1.500" High Alloy Steel Valve. .3115" stem diameter; requires 8mm reamer to enlarge guide. NOTE: If engine block has an OEM valve seat insert, remove the insert, and cut or regrind the [31º or 46º] seat angle for this valve to sit directly into the cast iron block without enlarging the counterbore. $50.00 each, plus shipping & handling.
  • 1.600" High Alloy Lightweight Steel Valve. .311" (5/16") stem diameter. $20.00 each, plus shipping & handling.
  • 1.625" High Alloy Lightweight Steel Valve. .311" (5/16") stem diameter. $20.00 each, plus shipping & handling.
  • 1.720" High Alloy Lightweight Steel Valve. 8mm stem diameter; requires 8mm reamer to enlarge guide. $20.00 each, plus shipping & handling.
  • 1.910" High Alloy Lightweight Steel Valve. Can be used with .085" offset bronze valve guide. .312" stem diameter; requires 8mm reamer to enlarge guide. $50.00 each, plus shipping & handling.
  • 1.920" High Alloy Lightweight Steel Valve. Can be used with .085" offset bronze valve guide. .312" stem diameter; requires 8mm reamer to enlarge guide. $50.00 each, plus shipping & handling.
  • 1.940" Titanium Valve. Can be used with .085" offset bronze valve guide. .311" (5/16") stem diameter. $85.00 each, plus shipping & handling.


High Quality Valve Lapping Rubber Cup and Tools with Wooden Contoured Grip. After the valve faces and seats have been professionally recut or reground in a valve refacer machine and valve seats recut or reground with a valve seat grinder/grinding stone, and valve clearances have been set to specifications, apply valve grinding/lapping compound (which can be purchased online and at virtually any auto parts store) on the valve faces and according to valve size, use these tools to rotate the valve in its seat back and forth by hand (lap-in the valves) to create a rough surface on the valve face and seat so the valves will eventually wear into seats to form a perfect seal so the engine will have more compression to produce more power. IMPORTANT - Always thoroughly clean the valve grinding/lapping compound from the valves and seats, and inspect the valve face and seat for 360º contact before installing the valves!

  • 3/4" Rubber Suction Cup for Valve Lapping Tool. Replace this part when it no longer holds suction to the valve. $4.00 each, plus shipping & handling.
  • Small Valve Lapping Tool for Smaller Valves. Has 19/32" and 25/32" diameter rubber suction cups. $6.00 each, plus shipping & handling.
  • Large Valve Lapping Tool for Larger Valves. Has 1-1/8" and 1-3/8" diameter rubber suction cups. $8.00 each, plus shipping & handling.


è New valves for other makes and models of small engines are also available.

Valve Guides - FYI - Valve guides are made of either cast iron or bronze, and not steel. Cast iron and bronze are very hard and porous metals. They absorb oil and lubricate the valve stems for longer wear. [Return To Previous Paragraph, Section or Website]


Stock (centered) Cast Iron Valve Guides. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8. Dimensions: .310" I.D. x .5645" O.D. x 1.686" overall length. NOTE: Use my valve guide removal and installation tool to remove and install valve guides. After installation and for correct valve stem clearance, guide may need to be enlarged with a 5/16" reamer Ê. And before installing valve, apply clean motor oil on valve stem to provide lubrication of the guide and stem.

  • High quality aftermarket. Replaces Kohler part # 230007-S. $17.00 each, plus shipping & handling.
  • OEM Kohler part # 230007-S. $17.50 each, plus shipping & handling.
  • NOTE: The alternative to installing new replacement valve guides is to have the old [worn] valves reamed for installation of thin-wall bronze sleeves/liners (bushings), which can be installed by a reputable automotive machine shop. Bronze valve guide sleeves/liners are a low-cost alternative to replacing the entire guide in most engines. Bronze also last longer than cast iron guides because bronze is harder material and it retains more oil for better lubrication of the valve stem.


Stock (centered) Cast Iron Valve Guides. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16, K482, K532 and K582. Dimensions: .310" I.D. x .629" O.D. x 2.135" overall length. NOTE: Use my valve guide removal and installation tool to remove and install valve guides. After installation and for correct valve stem clearance, guide may need to be enlarged with a 5/16" reamer Ê. And before installing valve, apply clean motor oil on valve stem to provide lubrication of the guide and stem.

  • High quality aftermarket. Replaces discontinued Kohler part # 235007-S. $18.00 each, plus shipping & handling.
  • NOTE: The alternative to installing new replacement valve guides is to have the old [worn] valves reamed for installation of thin-wall bronze sleeves/liners (bushings), which can be installed by a reputable automotive machine shop. Bronze valve guide sleeves/liners are a low-cost alternative to replacing the entire guide in most engines. Bronze also last longer than cast iron guides because bronze is harder material and it retains more oil for better lubrication of the valve stem.


Cast Iron Valve Guides. Fits Kohler engine model K361 cylinder head.

  • Intake Valve Guide. New Old Stock. Discontinued Kohler part # 45 316 02-S. $20.00 each, plus shipping & handling. (When available.)
  • Exhaust Valve Guide and Seal Kit. OEM Kohler part # 45 755 11-S. $69.65 per kit, plus shipping & handling.
  • NOTE: The alternative to installing new replacement valve guides is to have the old [worn] valves reamed for installation of thin-wall bronze sleeves/liners (bushings), which can be installed by a reputable automotive machine shop. Bronze valve guide sleeves/liners are a low-cost alternative to replacing the entire guide in most engines. Bronze also last longer than cast iron guides because bronze is harder material and it retains more oil for better lubrication of the valve stem.


Stock (centered) Cast Iron Valve Guides. Fits Kohler engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20. NOTE: Use my valve guide removal and installation tool to remove and install valve guides. After installation and for correct valve stem clearance, guide may need to be enlarged with a 5/16" reamer Ê. And before installing valve(s), apply oil or grease on valve stem to provide lubrication of the guide and stem. To replace the valve guides in Kohler engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 or MV20 with the engine fully assembled and cylinders fastened to the crankcase, first remove the springs, retainers and valves, and break off the protruding end of the guide in the valve spring compartment with a cold chisel and hammer, then drive out the remaining portion of the guide into the spring compartment. But with the cylinders off the crankcase, just drive the guides out without breaking them off first. Install new guides by driving them in until flush with the surface of the port. Then ream the guides so the valve stems will have proper clearance.

  • Exhaust Valve Guide. Outside diameter same entire length of guide. Dimensions: .310" I.D. x .5645" O.D. x 1.378" overall length. High quality aftermarket. Machined by A-1 Miller's. Replaces discontinued Kohler part # 52 316 08-S. $25.00 each, plus shipping & handling.
  • Intake Valve Guide. Has partially reduced O.D. machined step for installation of valve stem seal (listed below). Valve stem seal required to prevent crankcase oil from being suctioned into combustion chamber. Dimensions: .310" I.D. x .5645" O.D. x .500" reduced O.D. (for seal) x 1.378" overall length. High quality aftermarket. Machined by A-1 Miller's. Replaces discontinued Kohler part # 52 316 08-S. $30.00 each, plus shipping & handling.

NOTE: The alternative to installing new replacement OEM-type valve guides is to have the old [worn] guides reamed for installation of thin-wall bronze sleeves/liners (bushings), which can be installed by a reputable automotive machine shop. Bronze valve guide sleeves/liners are a low-cost alternative to replacing the entire guide in most engines. Bronze also last longer than cast iron guides because bronze is harder material and it retains more oil for better lubrication of the valve stem.


High Quality, High Speed Steel 5/16" (.3125") Chucking Reamer. Use to clean carbon deposits from used valve guides or enlarge new guides after installing for a 5/16" valve stem in flathead 7hp+ B&S, Kohler, 8hp+ Tecumseh, etc. engines. $20.00 each, plus shipping & handling.
A-1 Miller's Valve Guide Removal and Installation Tool for use with all Kohler K-series and Magnum engines. IMPORTANT: The engine block could crack if guides are removed or installed with a hydraulic press! Therefore, it's best to use a big, heavy hammer (with this tool) to drive out the old guide into the valve spring compartment and use the same hammer (with this tool) to install the new guide externally from inside the valve pocket. When installing the new guide, be sure to hammer straight down in alignment with the guide bore hole and not at an angle. Hitting the guide at an angle could cause it to break. Install new guides until flush with the valve pocket. This tool can be used with either OEM Kohler and aftermarket offset valve guides. Machined at a 90º angle where the pilot meets the shank. Dimensions: .300" pilot x 1/2" diameter shank x 5" overall length. A proven, ingenious and innovative concept by Brian Miller. Please do not accept advertised copycat products of this kind. (But I do appreciate them acknowledging my ingenuity and intelligence.) A-1 Miller's part. $20.00 each, plus shipping & handling. [Return To Previous Paragraph, Section or Website]
High Quality, High Speed Steel Chucking Reamers. Precision ground to provide correct stem to guide clearance. Will not allow valve stem to be too loose or too tight in guide. When reaming guide, use an electric hand drill with plenty of oil in guide. Before installing valve, apply motor oil on stem for lubrication to reduce wear to guide and prevent valve from sticking. [Return to Previous Section, Paragraph or Website]
  • 5/16" (.3125") Chucking Reamer. Use to clean carbon deposits from used valve guides or enlarge new guides after installing for a 5/16" valve stem in flathead 7hp+ B&S, Kohler, 8hp+ Tecumseh, etc. engines. $20.00 each, plus shipping & handling.
  • 8mm Chucking Reamer. Use to enlarge valve guides for installation of aftermarket valves with an 8mm valve stem in Kohler engine models K361, KT19 (first design), KT19 Series II, KT21, M20 and MV20, or 1.72" oversize valve in 10-16hp Kohler engines. $20.00 each, plus shipping & handling.
  • 11/32" (.3438") Chucking Reamer. Use to enlarge guides for installation of small block Chevy V8 valves in Kohler competition pulling engines. $20.00 each, plus shipping & handling.
Valve Stem Seals. Required to prevent crankcase oil from draining down into (OHV) or being suctioned into (flatheads) the combustion chamber through the guide. Silicone rubber w/metal clamp. NOTE: Apply oil or grease on valve stem before inserting valve through seal to provide lubrication of the stem, guide and seal. Dimensions: 5/16" I.D. (stem) x .500" I.D. (guide) x .600" O.D. NOTE: Some early production KT17 models do not use valve stem seals.
  • High quality aftermarket. Fits Kohler engine models K361, MV16, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18, MV18, M20 and MV20. Replaces Kohler part # 52 032 13-S. $4.00 each, plus shipping & handling.
  • Fits Kohler engine models K361, MV16, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18, MV18, M20 and MV20. OEM Kohler part # 52 032 13-S. $22.40 each, plus shipping & handling. [Return to Previous Section, Paragraph or Website]

OEM, Performance, High-Performance Camshafts, Valve Springs, Retainers, Rotators and Keepers - Please contact A-1 Miller's if you're interested in purchasing any of the products or services listed in this website. If you need a part or parts that's not listed in this website, please contact A-1 Miller's and we'll see if we can get it at a reasonable price. | [Top of Page] (Prices are subject to change without notice.)
Automatic Compression Release (ACR) Spring. This tiny [hair-like] spring is hard to find part nowadays. Fits Kohler engine models K141, K161, K181, M8, K241, M10, K301, M12, K321, M14, K341, M16 and K361. Fits later one-piece camshafts with the automatic compression release (opens exhaust valve slightly upon the compression stroke) and not the early two-piece camshafts with the automatic spark advance. FYI - If you have a Kohler 7-16hp ACR camshaft that was broke in two by a thrown connecting rod, save the spring off of it. It can be used on another good cam that may not have one. Or if your ACR spring places little or weak pressure against the flyweights/levers, it can be re-bent or reshaped to its original condition to place sufficient tension against the flyweights/levers. I do this all the time with my customer's engine rebuilds and it works great. It's became regular practice with me. - Brian Miller
  • Used and in excellent condition. Discontinued Kohler part number 47 089 01-S. $20.00 each, plus shipping & handling. (When available.)
New-Style, One-Piece, OEM Kohler Camshafts with Automatic Compression Release (ACR). NOTE: May or may not come with the tiny (hair-like) automatic compression release (ACR) spring (see above). If required, reuse the spring off your camshaft. IMPORTANT: Apply ample amount of clean motor oil inside cam before installing to prevent seizing of cam on pin! This will provide vital initial lubrication until crankcase oil reaches the cam/pin when the engine is first ran. And when reusing lifters, roughen lifter faces with 600 grit sandpaper to produce a new wear pattern so the lifters will rotate slightly with every lift to prevent wear to the cam lobes. Also, the lobes on these used cams have not been reground for performance. [Top of Page]
  • K-series Camshaft with Points Lobe. Fits and designed for Kohler K-series engine models K241, K301, K321 and K341. Points lobe, lifter lobes, gear teeth and ACR are all in good condition. Can be used in an early K-series engine as an upgrade from the older two-piece camshaft with the automatic timing advance for easier cranking of engine. Used and in excellent condition. Discontinued Kohler part #'s 45 010 06-S, 47 010 09-S. (These are basically the same camshafts, just different part numbers.) $75.00 each, plus shipping & handling. (When available.)
  • Magnum Camshaft with no Points Lobe. Fits and designed for Kohler Magnum engine models M10, M12, M14 and M16, but can be used in the K-series models K241, K301, K321 and K341 that have solid state ignition or crank trigger electronic ignition. Lifter lobes, gear teeth and ACR are all in good condition. Used and in excellent condition. Discontinued Kohler part #'s 47 010 06-S, 47 010 11-S. (These are basically the same camshafts, just different part numbers.) $65.00 each, plus shipping & handling. (When available.)
Professionally Reground 4,000± RPM Performance Torque Cast Camshaft for Kohler General-Use or Competition Pulling Engines | [Top of Page]

FYI - In order to gain the full benefit of a performance camshaft, just installing this type of cam will not greatly increase the power output of a Kohler engine. Along with the performance cam, the carburetor will need to be bored-out and reworked, the cylinder head will need to be milled .050" to raise the compression ratio, the valves/seats will need to be reworked, and installing an open/unrestricted exhaust header pipe will help, too. All of these things must work together so more air will enter the combustion chamber (and exit the chamber), which will build up more compression to allow the engine to produce more horsepower and torque.

For Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361. This particular cam profile design is suitable for heavy lawn and garden work, snow removal, etc., or stock competition pulling to provide more torque (lugging power) and improved engine performance from 3,800 to 4,200 RPM. The lobes on this cam are not welded up. They are professionally and precision reground on a cam grinding machine to have the factory stock lift, but with slightly increased duration, which makes it perform best around 4,000 RPM. This cam will pass tech for a stock cam. It will add about 3 more horsepower and 2 ft. lbs. of torque to the average stock engine with more lugging power than the OEM Kohler K361 cam. This cast cam performs best with our performance BLUE valve springs (listed below; to prevent fuel spray out the carburetor and lifter chatter), race-quality retainers (or the OEM Kohler stamped steel retainers can be used), quality valve job, ports made larger, and a reworked carburetor with a bored-out venturi for maximum performance for competition pulling. If there's any restriction of airflow in and out of the combustion chamber, the cam will not perform at 100% efficiency. This cam builds up the compression about 6% more than the K361 cam, and approximately 11% more than the flathead engine cams at around 4,000 RPM. This cam sounds just like an OEM Kohler stock cam. You can't hear the difference out the exhaust. The duration and centerline of the lobes on this cam helps the engine produce the most power and torque between 3,600-4,500 RPM. At higher RPM, due to the limited duration, no substantial gain in power or torque will result. If the engine is built to the max, tractor is geared correctly and traction is adequate, engine shouldn't bog down much with this cam. It'll keep pumping out the ponies right out the gate! Use with the OEM Kohler 1" base lifters. When reusing lifters, roughen lifter faces with 600 grit sandpaper in an erratic pattern to produce a new wear pattern and so the lifters will rotate slightly with every lift to prevent wear to the cam lobes. Use the recommended break-in oil, too. This cam installs just like the OEM Kohler cam. Just thoroughly lubricate the inside with motor oil, align the timing marks on the gear teeth, set the end-play and valve clearances at .010" for the intake and .014" for the exhaust, and it should be good to go! IMPORTANT: NEVER INSTALL THE CAMSHAFT DRY! To prevent seizing of the cam on the pin when the engine is ran for the first time, apply plenty of clean motor oil inside the cam before installing it in the engine. This will provide vital lubrication of the cam until crankcase oil reaches it.

  • $175.00 each to professionally regrind YOUR Kohler K241, M10, K301, M12, K321, M14, K341 or M16 stock camshaft*, plus return shipping & handling.
  • $200.00 each for a professionally reground cam only with your acceptable stock camshaft core trade-in* for exchange, plus shipping & handling.
  • $220.00 for a professionally reground cam, blue springs and race quality retainers with your acceptable stock camshaft core* trade-in for exchange, plus shipping & handling.
  • $225.00 each outright for a professionally reground cam only with no core trade-in, plus shipping & handling.
  • $235.00 for a professionally reground cam and blue springs with your acceptable stock camshaft core trade-in*. Customer can reuse their own stamped steel retainers (do not use rotators!), plus shipping & handling.
  • $245.00 for a professionally reground cam, blue springs and race quality retainers with your acceptable stock camshaft core trade-in*, plus shipping & handling.
  • *NOTE: Only the one-piece camshaft with the ACR (automatic compression release) will be accepted as a regrind or core trade-in. Core trade-in must be in good condition, no cracks, never reground or welded on before, gear teeth in good condition, minimal wear on points lobe and preferably the compression release tang intact with the ACR spring installed. And when sending a cam to A-1 Miller's, please include a note with your name, complete mailing address, phone number and a description of what you want done and a list of any other parts you may need, and we will contact you when the cam (and parts) are ready to be sent back to you. Please send to: A-1 Miller's Performance Enterprises, 1501 W. Old Plank Rd., Columbia, MO (Missouri) 65203-9136 USA.

FYI: When the cam lobes are reground, metal is removed from the base circle which reduce the diameter of the base circle in order retain maximum lift at the point on the lobe. The ramps on the lobes are also "rounded" to give the cam more duration. The cam grinding machine's grinding stones are about 1" wide, and after the cam grinding process, we have to manually grind metal away from the sides of the base circles so the edge of the lifters won't "ride up" on the ungrounded areas and hold the valves slightly open when they're supposed to be fully closed. We have to do this to every reground cam we have in stock. Some cam grinders apply a phosphate conversion coating (which resembles flat or matte black paint) to the entire camshaft, especially the lobes. This coating is to prevent galling (wear) during the break-in period and it also covers the secondary grinding areas on each side of the base circles of the lobes so they can't be readily easily seen or noticed. Motor oil with high zinc phosphate content will also protect the cam lobes and other internal moving engine parts from wear during break-in. Otherwise, if everything else is set up correctly with your engine, this cam should work fine. There's no need to be concerned when you receive the cam and see the metal ground away. Also, some of the cams we have, the points lobe is slightly worn. (It's hard to find a good used, 100% unworn cam nowadays.) we include a stainless steel points pushrod with a flared-end to make contact with the unworn areas of the lobe. The pushrod will need to be installed from inside the block before the cam is installed. IMPORTANT: To prevent seizing of camshaft on pin when engine is ran for the first time, apply plenty of motor oil on cam pin and inside cam before installing cam in engine. This will better protect the parts until crankcase oil reaches them.


Medium Performance (Blue) Single Valve Spring Set for Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361. Can also be used in Kohler opposed (flathead) twin cylinder engine models KT17 Series II, KT19 Series II, KT21, M18, M20, K482, K532 and K582 for increased performance or competition pulling and with the OEM Kohler stamped steel valve retainers listed below. These springs are more aggressive than OEM Kohler valve springs, but less aggressive than the red valve springs listed below. Suitable for competition pulling engines only; not recommended for general yard or garden use. Can be easily compressed with a small engine valve spring compressor tool. Designed for the OEM Kohler stock cam or our reground 4,000± RPM torque cam with stock lift in pulling engines running up to 5,000 RPM for quicker valve closing to prevent valve float. (Newton's third law of motion.) Valve float allows the engine to momentarily lose compression, cause fuel to spray out the carburetor and the engine will make a "hunt, hunt" sound at high RPM. As a result, the engine will lose power, and as the weight box on the sled moves forward upon on the tractor, the engine may not be able to recover. These springs can be used with stock size valves, OEM Kohler stamped steel/non-rotator retainers and keepers/locks/collets. Do not use with OEM Kohler valve rotators with these springs! Rotators are thicker, and being these performance springs are much longer (and slightly stiffer) than stock springs (that require rotators), coil bind may result at full valve lift, which could break the cam. Sold as a matched set. One spring is no stiffer than the other. Can be easily compressed with a standard small engine valve spring compressor. Same diameter as OEM Kohler springs. Dimensions: .697" I.D.; .953" O.D.; 2" uncompressed height. specifications: Seat load: 27 lbs. at 1.650"; Open load: 70 lbs. at 1.200"; Coil bind: .920"; Spring rate (lbs/inch): 96. Made by Comp Cams. New. $10.00 per set of two, plus shipping & handling.

High Performance Cast Camshaft for Hot-Stock and Stock-Altered Kohler Competition Pulling Engines | [Top of Page]

Designed specifically for Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361 competition pulling engines. This is a much more aggressive camshaft than listed above. The lobes are hard-surface welded on an OEM Kohler cast cam, then professionally and precision ground on a camshaft grinding machine to give it a valve lift of .330" at .010" lifter-to-stem clearance for the intake and .329" at .012" lifter-to-stem clearance for the exhaust, but much more duration (290º), which holds the valves open longer in relation to piston travel. The valve lift is measured without the valve springs installed. Because with the springs installed, they place downward pressure on the cam, resulting in a lower reading. This is normal for all high performance engines with stiff valve springs. This cast cam performs best at open RPM with our high performance RED valve springs (listed below; to prevent fuel spray out the carburetor and lifter chatter), race-quality retainers (or the OEM Kohler stamped steel retainers can be used), quality valve job, ports made larger, and a reworked carburetor with a bored-out venturi for maximum performance for competition pulling. If there's any restriction of airflow in and out of the combustion chamber, this cam will not perform at 100% efficiency. Due to the increased duration, with an open header pipe, at low idle, this cam produces a distinctive loud and attention-getting BOOM, BOOM sound, and the sound "smoothes out" at higher and steady engine RPM, and then upon sudden deceleration, it produces a loud bellowing, rumbling, crackling sound with backfire (possibly with flames) out the exhaust, which is normal. Due to the long duration, at prolonged slow idle, this cam might also cause slight flooding or "loading up of fuel" in the carburetor, which is normal; click here to learn about this. This cam profile helps the engine produce the most power and torque at open RPM operation. If used in a 4,000± RPM engine, no substantial increase in power will result. To be used with wide base lifters. When reusing lifters, roughen lifter faces with 600 grit sandpaper in an erratic pattern to produce a new wear pattern and so the lifters will rotate slightly with every lift to prevent wear to the cam lobes. Use the recommended break-in oil, too. This cam installs just like the OEM Kohler cam. Just thoroughly lubricate the inside with motor oil, align the timing marks on the gear teeth, set the end-play and valve clearances at .010" for the intake and .012" for the exhaust, and it should be good to go! NOTE: If methanol fuel is going to be used, and depending on the size of the combustion chamber, the ignition timing will need to be advanced to 28-30º BTDC. To reach this much timing, the automatic compression release mechanism on this cam will need to be removed and a high torque starter motor or gear reduction starter will also need to be used. Otherwise, the timing would be so far advanced, the spark will occur when the compression release opens the exhaust valve. This will cause the engine to be hard to start, if it would start at all. IMPORTANT: NEVER INSTALL THE CAMSHAFT DRY! To prevent seizing of the cam on the pin when the engine is ran for the first time, apply plenty of clean motor oil inside the cam before installing it in the engine. This will provide vital lubrication of the cam until crankcase oil reaches it.

  • $215.00 each to weld up and regrind YOUR Kohler K241, M10, K301, M12, K321, M14, K341 or M16 camshaft* for Hot-Stock or Stock-Altered open RPM competition pulling, plus return shipping & handling.
  • $240.00 each for a welded up and reground cam only with your acceptable stock camshaft core trade-in* for exchange, plus shipping & handling.
  • $262.00 for a welded up and reground cam, red springs and race quality retainers with your acceptable stock camshaft core* trade-in for exchange, plus shipping & handling.
  • $265.00 each outright for a welded up and reground cam only with no core trade-in, plus shipping & handling.
  • $275.00 for a welded up and reground cam and red springs with your acceptable stock camshaft core trade-in*. Customer can reuse their own stamped steel retainers (do not use rotators!), plus shipping & handling.
  • $285.00 for a welded up and reground cam, red springs and race quality retainers with your acceptable stock camshaft core trade-in*, plus shipping & handling.
  • *NOTE: Only the one-piece camshaft with the ACR (automatic compression release) will be accepted as a regrind or core trade-in. Core trade-in must be in good condition, no cracks, never reground or welded on before, gear teeth in good condition, minimal wear on points lobe and preferably the compression release tang intact with the ACR spring installed. And when sending a cam to A-1 Miller's, please include a note with your name, complete mailing address, phone number and a description of what you want done and a list of any other parts you may need, and we will contact you when the cam (and parts) are ready to be sent back to you. Please send to: A-1 Miller's Performance Enterprises, 1501 W. Old Plank Rd., Columbia, MO (Missouri) 65203-9136 USA.


High Performance (Red) Single Valve Spring Set for Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361. These are more aggressive than the blue valve springs listed above. Suitable for competition pulling engines that run at very high RPM or open RPM. Can be easily compressed with a small engine valve spring compressor tool. Designed for cast or steel cams with up to .400" lift in Hot-Stock or Stock-Altered competition pulling engines that run at open RPM for quicker valve closing to prevent valve float. (Newton's third law of motion.) Valve float allows the engine to momentarily lose compression, cause fuel to spray out the carburetor and the engine will make a "hunt, hunt" sound at high RPM. As a result, the engine will lose power, and as the weight box on the sled moves forward upon on the tractor, the engine may not be able to recover. These springs can be used with stock size or oversize valves, OEM Kohler stamped steel/non-rotator retainers and keepers/locks/collets. Do not use with OEM Kohler valve rotators with these springs! Rotators are thicker, and being these performance springs are much longer (and much stiffer) than stock springs that require rotators, coil bind may result at full valve lift, which could break the cam. Sold as a matched set. One spring is no stiffer than the other. Can be easily compressed with a standard small engine valve spring compressor tool. Same diameter as OEM Kohler springs. Dimensions: .697" I.D.; .953" O.D.; 2" uncompressed height. specifications: Seat load: 55 at 1.500"; Open load: 127 at 1.000"; Coil bind: .950"; Spring rate (lbs/inch): 144. Made by Comp Cams. New. $12.00 per set of two, plus shipping & handling.

OEM Kohler Stamped Steel Valve Spring Isolator. Prevents engine operating heat from collapsing or weakening valve springs. For general yard and garden engines. Not required for competition pulling engines. Fits Kohler K-series and Magnum engine models K141, K160/K161, KV161, L160/L161, L181, K181, M8, K241, M10, K301, M12, K321, M14, K341, M16, K361, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20, MV20, K482, K532 and K582. For 5/8" O.D. valve guides. OEM Kohler part # 235011-S.
  • Used and in excellent condition. $2.00 each, plus shipping & handling. (When available.)
  • New. $4.25 each, plus shipping & handling.
FYI: The OEM valve springs in various models of Kohler cast iron block engines are not the same. They are not like the OEM springs that's used in a stock small block Chevy V8's, which are the same. For some reason, Kohler installed a specific valve spring in a certain model engine to match the cam profile (lobe lift and duration) so the engine will perform best. And used valve springs rarely lose adequate pressure. They can be reused as long as they're not rusted or have been overheated. The rust-pitted areas is a weak spot and when in operation and under pressure, the spring could break.


OEM Kohler Valve Springs designed specially for Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8. Each have no dampening end. Recommended for general lawn and garden use or snow removal. Suitable for up to 3,600± RPM with cam having stock lift.

  • 1-9/16" uncompressed height; use only with valve rotator. Requires rotator (listed below) on exhaust valve to scrape away any carbon deposits lodged between valve face and seat to prevent burning of valve. Discontinued Kohler part # 230168-S. Used, in excellent condition and rust-free. $10.00 each, plus shipping & handling. (When available.)
  • 1-11/16" uncompressed height; use only with stamped steel valve retainer. Suitable for intake valve. Discontinued Kohler part # 230010-S. Used and in excellent condition, and rust-free. $9.00 each, plus shipping & handling. (When available.)


OEM Kohler Valve Springs designed specially for Kohler K-series and Magnum engine models K241, M10, K301, M12, K321, M14, K341, M16, K361, K482, K532 and K582. Each have dampening end to lessen harmonic vibrations at higher RPM. Recommended for general lawn and garden use or snow removal. Suitable for up to 3,600± RPM with cam having stock lift.

  • 1-9/16" uncompressed height; use only with valve rotator in models K241, M10, K301, M12, K321, M14, K341, M16, K482, K532 and K582. Do not use this spring on model K361, even with a rotator. Requires rotator (listed below) on exhaust valve to scrape away any carbon deposits lodged between valve face and seat to prevent burning of valve. Used and in excellent condition. Discontinued Kohler part # 235168-S. $5.00 each, plus shipping & handling. (When available.)
  • 1-3/4" uncompressed height; use only with stamped steel valve retainer in models K241, M10, K301, M12, K321, M14, K341, M16, K482, K532 and K582, and with rotator on model K361. Suitable for intake valve in models K241, M10, K301, M12, K321, M14, K341 and M16, and for both valves on model K361. Used and in excellent condition, and rust-free. Discontinued Kohler part # 235010-S. $10.00 each, plus shipping & handling. (When available.)


OEM Kohler Valve Springs designed specially for Kohler KT-series and Magnum engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20. Has no dampening end. Recommended for general lawn and garden use or snow removal. Suitable for up to 3,600± RPM with cam having stock lift. 1-9/16" uncompressed height; use only with valve rotator. Rotator recommended for exhaust valve to scrape away any carbon deposits lodged between valve face and seat to prevent burning of valve.

  • Used and in excellent condition, and rust-free. $4.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 25 089 01-S. $7.00 each, plus shipping & handling.
OEM Kohler Stamped Steel Valve Retainers. Used mainly for intake valve. Not recommended for exhaust valve in general yard and garden equipment engines due to its inability to rotate valve, which would allow carbon deposits to become lodged between face and seat, causing a warped or burnt valve, resulting in loss of compression. Fits Kohler K-series and Magnum K141, K160/K161, KV161, L160/L161, L181, K181, M8, K241, M10, K301, M12, K321, M14, K341, M16, K361, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20, MV20, K482, K532 and K582. Use only with longer (1-3/4" uncompressed length) OEM Kohler or high-performance valve springs listed above. If used with the shorter (1-9/16" uncompressed length) OEM Kohler valve spring, may cause lifter chatter at higher RPM, valve float and/or engine misfire, and could possibly wear the locking tang inside the keepers. For 5/16" diameter valve stems. Accepts 7º keepers/locks/collets (listed below) .998" outside diameter. Made of lightweight, heat-treated, hardened stamped steel. OEM Kohler part # 230011-S.
  • Used and in excellent condition. $4.00 each, plus shipping & handling. (When available.)
  • New. $6.30 each, plus shipping & handling.


OEM Kohler Valve Rotators. Used mainly for exhaust valve in general yard and garden equipment engines. Rotates valve slightly as it opens to scrape away any carbon deposits from the face and seat to prevent a warped or burnt valve, which would result in loss of compression. Not needed for intake valve. Fits Kohler K-series and Magnum K141, K160/K161, KV161, L160/L161, L181, K181, M8, K241, M10, K301, M12, K321, M14, K341, M16, K361, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20, MV20, K482, K532 and K582. Also fits 6hp-18hp single and opposed twin cylinder Briggs & Stratton engines. Use only with shorter (1-9/16" uncompressed length) valve spring listed above. If used with longer 1-3/4" OEM Kohler or high performance valve spring, coil bind may occur, resulting in possible cam breakage. For 5/16" diameter valve stems. Accepts 7º keepers/locks/collets listed below. OEM Kohler part # 52 413 01-S. Replaces Briggs & Stratton part # 691939.
  • Used and in excellent condition. $12.00 each, plus shipping & handling. (When available.)
  • New. $23.75 each, plus shipping & handling.


High Performance Valve Spring Retainers. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361. To be used with our BLUE medium performance valve springs or our RED high performance valve springs, or when used with OEM Kohler valve springs, the [longer] 1-11/16" or 1-3/4" uncompressed height spring must be used. NOTE: The OEM Kohler stamped steel retainers will work just as well with the blue or red springs. Made of lightweight, hardened 4140 chrome-moly thick steel. Not made of stamped steel. Accepts 7º keepers/locks/collets listed below. Replaces OEM Kohler part # 230011-S.
  • New. $10.00 per set of two, plus shipping & handling.
5/16" Valve Keepers/Locks/Collets for all Kohler K-series and Magnum K141-K361 cast iron engines, and KT series and Magnum twin cylinder flathead engines, including K482, K532 and K582. Also fits 6hp-18hp single- and twin-cylinder Briggs & Stratton exhaust valves. Can be used with 8mm valve stems and high performance valve springs listed above. NOTE: Valve keepers usually don't wear or get damaged because they don't rotate on the valve stem. To check yours, with a valve out of the engine, install a valve retainer or rotator on the valve, then the keepers, and then pull back hard on the retainer or rotator. If the retainer or rotator holds or squeezes the keepers tight in the groove, then they can be reused. Replaces Briggs & Stratton part # 494553.
  • Race quality aftermarket. Replaces Kohler part # 41 755 10-S. $3.00 per set (two keepers for one valve), plus shipping & handling.
  • OEM Kohler part # 41 755 10-S. $6.35 per set (two keepers for one valve), plus shipping & handling. [Return To Previous Paragraph, Section or Website]
Valve Lifters/Tappets. Replace worn lifter(s) to prevent erratic valve action and/or premature cam lobe wear. Non-adjustable; grind end of valve stems with piston positioned at TDC on compression stroke to set valve clearances.
  • New Old Stock or used and in excellent condition. Fits older Kohler engine models K141, K160/K161 and L160/L161 with the two-piece camshaft with automatic timing advance in K141 engines prior to specification suffix "C" and in K161 and L160/L161 engines prior to specification suffix "J", or use for intake valve only with one-piece camshaft with automatic compression release (ACR). Dimensions: 2.020" overall length x 1.115" base diameter x .308" stem diameter. Discontinued Kohler part # 230013-S. $15.00 each, plus shipping & handling. (When available.)
  • New Old Stock or used and in excellent condition. Fits later Kohler engine models K141, K160/K161, K181, L181 and M8. For use for exhaust valve only with one-piece camshaft with automatic compression release (ACR). Dimensions: 1.964" overall length x 1.115" base diameter x .308" stem diameter. Discontinued Kohler part # 232777-S. $16.00 each, plus shipping & handling. (When available.)


Wide Base LiftersStock Base Adjustable Valve Lifters/Tappets. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341 and M16. Dimensions: 1.060" base diameter x .6225" stem diameter x 2.750"-3.000" overall (adjustable) length. Use for OEM Kohler stock or performance cams with up to .340" lift. Set valve clearances with piston positioned at TDC on compression stroke.

  • Used and in excellent condition. Discontinued Kohler part # D-235327-S. $20.00 each, plus shipping & handling. (When available.)

Wide Base Adjustable Valve Lifters/Tappets. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341 and M16. Dimensions: 1.280" base diameter x .6225" stem diameter x 2.750"-3.000" overall (adjustable) length. For competition pulling engines with a high-performance cam with .400"-.575" lift. Set valve clearances with piston positioned at TDC on compression stroke. May need to reuse 7/16" adjusters from OEM Kohler lifters with these wide base lifters. (These are NOT Jeep lifters! Jeep lifters are too long and will not fit Kohler engines.)

  • Used and in excellent condition. $15.00 each, plus shipping & handling. (When available.)
  • New. $23.00 each, plus shipping & handling.


Valve Lifters/Tappets. Replace worn lifter(s) to prevent erratic valve action and/or premature cam lobe wear. Non-adjustable; grind end of valve stems with piston positioned at TDC on compression stroke to set valve clearances.

  • Fits Kohler engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II and KT21. New Old Stock or used and in excellent condition. Discontinued Kohler part # 52 019 02-S. $20.00 each, plus shipping & handling. (When available.)
  • Fits Kohler engine models MV16, M18, MV18, M20 and MV20. New Old Stock or used and in excellent condition. Discontinued Kohler part # 52 019 03-S. $20.00 each, plus shipping & handling. (When available.)
Camshaft Pin. Fits Kohler K-series and Magnum engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361. 1144 Stress Proof Steel Pin. 1/2" diameter x 7" length. Replaces discontinued Kohler part # 235053-S (K-series; 7" length) and 47 380 09-S (Magnum; 6-3/4" length). $12.00 each, plus shipping & handling.


New 1/2" Diameter Expansion Cup Plugs for Cam Pin Hole on Flywheel End of Engine. Each fits Kohler Magnum engine models M10-M16.

  • Tapered Expansion Cup Plug. High quality aftermarket. Replaces Kohler part # 25 139 50-S. $1.00 each, plus handing & handling.
  • Shallow Expansion Cup Plug. OEM Kohler part # 25 139 50-S. $2.10 each, plus handing & handling.


Camshaft End Plugs and Rubber O-Ring. Each fits Opposed Twin Cylinder Kohler KT-series and Magnum engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20.

  • 11/16" Diameter Expansion Cup Plug. More secure fit than the OEM plug listed below - less prone to pop-out, resulting in leaking oil. Listed for the KT17 and KT19 engines, but will also fit the KT17 Series II, KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20 engines. Apply with clear RTV silicone adhesive sealant. High quality aftermarket. Replaces discontinued Kohler part # X-702-S. $1.00 each, plus handing & handling.
  • OEM Plug; includes new neoprene rubber O-ring (listed below). Listed for the KT17 Series II, KT19 Series II, KT21, MV16, M18, MV18, M20, engines, but will also fit the KT17 and KT19 engines. OEM Kohler part # 52 139 08-S. $7.50 each, plus handing & handling.
  • Neoprene Rubber O-Ring. Fits OEM Plug (listed above). Dimensions: 11/16" O.D. x 9/16" I.D. High quality aftermarket. Replaces discontinued Kohler part # 52 141 02-S. $1.00 each, plus handing & handling.
Camshaft Shims/Spacers/Thrust Washers. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181, M8, and Engine Control on Kohler Command Single Cylinder CV11-16, CV460-465, CV490-495. NOTE: Being the OEM camshaft shims/thrust washers for these model engines are discontinued from Kohler, the aftermarket shims listed below are the only ones we can find that closely match the dimensions of the OEM shims. And being the .010" thickness shim (part # 230294-S) is also discontinued from Kohler, if desired, order two each of the OEM .005" shims listed below to make one .010" shim.
  • .004" (0.1mm) Thickness x 12mm I.D. x 18mm O.D. High quality aftermarket. 1074-1095 Spring Steel Material; Rockwell B85 Hardness. .50¢ each, plus shipping & handling.
  • .008" (0.2mm) Thickness x 12mm I.D. x 18mm O.D. High quality aftermarket. 1074-1095 Spring Steel Material; Rockwell B85 Hardness. .50¢ each, plus shipping & handling.
  • .012" (0.3mm) Thickness x 12mm I.D. x 18mm O.D. High quality aftermarket. 1074-1095 Spring Steel Material; Rockwell B85 Hardness. .50¢ each, plus shipping & handling.
  • .005" Thickness x 7/16" i.d x 3/4" O.D. Discontinued Kohler part # 230293-S. $4.35 each, plus shipping & handling.


Camshaft Shims/Spacers/Thrust Washers. Fits Kohler K-series and Magnum engine models K241, M10, K301, M12, K321, M14, K341, M16, K361, and inside crankcase for Kohler Command V-Twin models CH18, CH20, CH22, CH23, CH25, CH620, CH621, CH640, CH641, CH670, CH680, CH730, CH740, CH750 and certain TH18. Aftermarket shims can also be used as an indexing washer for flat seat spark plugs.

  • .005" Thickness -
    • High quality aftermarket. 1/2" I.D. x 3/4" O.D. 1074-1095 Spring Steel Material; Rockwell B85 Hardness. Replaces Kohler part # 275066-S. .75¢ each, plus shipping & handling.
    • OEM Kohler part # 275066-S. 1/2" I.D. x 1" O.D. $5.65 each, plus shipping & handling.
  • .010" Thickness -
    • High quality aftermarket. 1/2" I.D. x 3/4" O.D. 1074-1095 Spring Steel Material; Rockwell B85 Hardness. Replaces Kohler part # 275067-S. .75¢ each, plus shipping & handling.
    • OEM Kohler part # 275067-S. 1/2" I.D. x 1" O.D. $5.65 each, plus shipping & handling.
Gaskets for Crankcase Breather Assembly/Cover. Fits Kohler engine models K90/K91.
  • High quality aftermarket. Replaces Kohler part # 220370-S. $1.60 each, plus shipping & handling.
  • OEM Kohler part # 220370-S. $4.85 each, plus shipping & handling.


Gaskets for Crankcase Breather Assembly/Cover. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8.

  • High quality aftermarket. Replaces Kohler part # 230048-S. $1.50 each, plus shipping & handling.
  • OEM Kohler part # 230048-S. $5.00 each, plus shipping & handling.


Inner Gaskets for Crankcase Breather Reed Plate. Fits Kohler engine models K241, M10, K301, M12, K330/K331, K321, M14, K341, M16 and K361.

  • High quality aftermarket. Replaces Kohler part # 235048-S. $1.00 each, plus shipping & handling.
  • OEM Kohler part #'s 235048-S. $4.80 per two gaskets, plus shipping & handling.

Outer Gaskets for Crankcase Breather Cover. Fits Kohler engine models K241, M10, K301, M12, K330/K331, K321, M14, K341, M16 and K361.

  • High quality aftermarket. Replaces Kohler part # 275144-S. $2.00 each, plus shipping & handling.
  • OEM Kohler part #'s 275144-S. $5.40 each, plus shipping & handling.


Gaskets for Crankcase Breather Assembly and Cover. Fits Kohler engine models MV16, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18, MV18, M20 and MV20.

  • High quality aftermarket. Replaces Kohler part # 52 055 01-S. $2.00 each, plus shipping & handling.
  • OEM Kohler part # 52 055 01-S. $5.75 each, plus shipping & handling.


FYI - Crankcase breather cover gasket(s) for Kohler engine models K482, K532 and K582 (part # 270034-S) have been discontinued from Kohler. Use clear RTV silicone adhesive sealant instead.
Crankcase Breather and Air Cleaner Neoprene Rubber Seal. Fits Kohler engine models K90/K91, K241, K301, K321, K341, K361, K582, M10, M12, M14, M16, MV16, M18, MV18, M20, MV20, CH640, CH730, CH740, CV670, CV680, CV730 and CV740. Dimensions: 1/4" I.D. x 1/2" O.D. x 9/16" length. FYI - A reinforced rubber fuel hose of the same size can be substituted for this part. OEM Kohler part #'s 220369-S and 231032-S. $5.65 each, plus shipping & handling. Crankcase Breather and Air Cleaner Neoprene Rubber Seal. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181, M8, MV18 MV20, CH18, CH20, CH22, CH25, CH730 and CV15. Dimensions: 1/4" I.D. x 1/2" O.D. x 7/8" length. FYI - A reinforced rubber fuel hose of the same size can be substituted for this part. OEM Kohler part #'s 230046-S. $4.90 each, plus shipping & handling.
Small Size Crankcase Breather Fibrous Filter (Oil Trap). Fits Kohler engine models K91, K141, K160/K161, KV161, L160/L161, L181, K181, M8, and opposed (flathead) twin cylinder engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18 and M20. (Kohler engine models MV16, MV18 and MV20 requires no part of this kind.) Replace deteriorated and crumbly filter to prevent loss of oil. NOTE: This "filter" is actually an oil trap. It traps and suspends oil droplets and prevents oil vapors from exiting the crankcase at higher RPM, then allows the oil to drain back down into the crankcase when the engine is at idle or turned off. (It's too coarse to be a filter of any kind, but Kohler calls it a filter.) Dimensions: Approximately (±) 1-1/4" x 1-1/4" square. OEM Kohler part only; not included in aftermarket engine gasket set.
  • OEM Kohler part # 231419-S. $6.65 each, plus shipping & handling.


Medium Size Crankcase Breather Fibrous Filter (Oil Trap). Fits Kohler engine models K241, K301, K330/K331, K321, K341 with the round shape metal air cleaner/filter assembly, and various Kohler Magnum models M12, M14 and M16. Replace deteriorated and crumbly filter to prevent loss of oil. NOTE: This "filter" is actually an oil trap. It traps and suspends oil droplets and prevents oil vapors from exiting the crankcase at higher RPM, then allows the oil to drain back down into the crankcase when the engine is at idle or turned off. (It's too coarse to be a filter of any kind, but Kohler calls it a filter.) Fills about 1/3 center area of breather plate. To be used with crankcase breather cover with open atmospheric vent and external oil control baffle shield part # 235117-S (listed below). Dimensions: Approximately (±) 1-1/2" wide x 2" tall. OEM Kohler part only; not included in aftermarket engine gasket set.
  • OEM Kohler part # 235118-S. $14.45 each, plus shipping & handling.


Large Size Crankcase Breather Fibrous Filter (Oil Trap). Fits Kohler AQS "Quiet Line" engine models K241, K301, K321, K341, K361 with the oblong shape metal air cleaner/filter assembly, and various Kohler Magnum engine models M10, M12, M14 and M16. Replace deteriorated and crumbly filter to prevent loss of oil. NOTE: This "filter" is actually an oil trap. It traps and suspends oil droplets and prevents oil vapors from exiting the crankcase at higher RPM, then allows the oil to drain back down into the crankcase when the engine is at idle or turned off. (It's too coarse to be a filter of any kind, but Kohler calls it a filter.) Fills entire area of breather plate. To be used with crankcase breather cover with PCV breather vent hose/tube and external oil control baffle shield and reed stop part # 270146-S (listed below). Dimensions: Approximately (±) 3" wide x 2" tall. OEM Kohler part only; not included in aftermarket engine gasket set.
Crankcase Breather Reed Valve. Fits Kohler engine model K91. Replace damaged or rusted reed valve to prevent loss of oil through breather vent hole, prevent outside dust and dirt from being drawn into crankcase and maintain crankcase vacuum and proper ventilation so engine will produce more power and last longer.
  • OEM Kohler part # 220379-S. $5.50 each, plus shipping & handling.


Crankcase Breather Plate and Reed Valve Assembly. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8. Replace damaged or rusted breather plate/reed valve assembly to prevent loss of oil through breather vent hole, prevent outside dust and dirt from being drawn into crankcase and maintain crankcase vacuum and proper ventilation so engine will produce more power and last longer.

  • New Old Stock or used and in excellent condition. Discontinued Kohler part # 230066-S. $15.00 each, plus shipping & handling. (When available.)
  • Modified Kohler twin cylinder engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 or MV20 crankcase breather plate and check valve or reed valve assembly so it will fit Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8. NOTE: The neoprene rubber seal is not needed with the breather that have the umbrella check valve. Replaces Kohler part # 230066-S. $20.00 each, plus shipping & handling.


Crankcase Breather Reed Valve. Fits Kohler engine models K241, M10, K301, M12, K330/K331, K321, M14, K341, M16 and K361. Replace damaged or rusted reed valve to prevent loss of oil through breather vent hole, prevent outside dust and dirt from being drawn into crankcase, and maintain crankcase vacuum so engine will produce more power. OEM Kohler part # 235047-S.

  • $10.15 each, plus shipping & handling.


Old Style Replacement Neoprene Rubber Umbrella Check Valve and Crankcase Breather Plate w/Umbrella Check Valve used on Kohler KT-series and Magnum opposed twin cylinder engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. Replace deteriorated rubber umbrella check valve to prevent loss of oil through breather vent hole, prevent outside dust and dirt from entering crankcase and maintain crankcase vacuum so engine will produce more power. NOTE: The old style breather with the umbrella valve works just as well as the new style breather with the steel reed valve. So if the umbrella valve of your breather is damaged, it can be replaced. NOTE: It cost less to just replace the umbrella valve than the entire breather plate with the steel reed valve.

  • New Neoprene Rubber Umbrella Check Valve Only. High quality aftermarket. Dimensions: 1" diameter x 3/16" diameter center plug. Retaining hole in breather plate will need to be drilled-out/enlarged to 3/16". Replaces discontinued Kohler part # 52 462 01. $4.00 each, plus shipping & handling.
  • Old Style Crankcase Breather Plate with New Neoprene Rubber Umbrella Check Valve Installed. Used and in excellent condition. Discontinued Kohler part #'s 52 096 22, 52 096 41 or 52 452 07. $20.00 each, plus shipping & handling. (When available.)

New Style Crankcase Breather Plate with Steel Reed Valve. Fits Kohler KT-series and Magnum opposed twin cylinder engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. Each listed below replaces OEM Kohler part # 52 254 07. NOTE: The two items listed below are basically the same with different part numbers and prices.

  • OEM Kohler part # 52 035 02-S. $22.40 each, plus shipping & handling.
  • OEM Kohler part # 52 035 04-S. $23.00 each, plus shipping & handling.
Inner Crankcase Breather Plate. Fits Kohler engine models K241, M10, K301, M12, K330/K331, K321, M14, K341, M16 and K361. Along with the reed valve installed, this part prevents outside dust and dirt from entering crankcase, and maintains crankcase vacuum and ventilation so engine will produce more power. Has internal oil control baffle splash shield spot-welded on backside of plate. IMPORTANT: Install with oil drain hole facing down. OEM Kohler part # 235631-S.
  • Used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)
  • New. $21.80 each, plus shipping & handling.
External Crankcase Breather Oil Control Baffle Shield. Fits Kohler engine models K241, K301, K330/K331, K321, K341 with the round shape metal air cleaner/filter assembly, and various Kohler Magnum models M12, M14 and M16 with an open atmospheric vent in crankcase breather cover. Prevents loss of oil through crankcase breather cover vent hole. Positions against reed valve inside of breather plate (listed below Ê). To be used with crankcase breather cover with open atmospheric vent and small crankcase breather fibrous filter (oil trap) part # 235118-S (above È). OEM Kohler part # 235117-S.
  • Used and in excellent condition. $2.00 each, plus shipping & handling. (When available.)
  • New. $4.15 each, plus shipping & handling.


Crankcase Breather Oil Control Baffle Shield and Reed Stop. Fits Kohler AQS "Quiet Line" engine models K241, K301, K321, K341, K361 with the oblong shape metal air cleaner/filter assembly, and various Kohler Magnum engine models M10, M12, M14 and M16. Positions against reed valve inside of breather plate (listed below Ê). To be used with positive crankcase ventilation (PCV) system breather vent hose/tube and large crankcase breather fibrous filter (oil trap) (part # 47 050 01-S; listed above È). OEM Kohler part # 270146-S.

  • Used and in excellent condition. $2.50 each, plus shipping & handling. (When available.)
  • New. $5.20 each, plus shipping & handling.
Crankcase Breather Cover. Fits Kohler engine models K241, M10, K301, M12, K330/K331, K321, M14, K341 and M16 with the round shape metal air cleaner/filter assembly. Replace bent, damaged or rusted cover to prevent leaking oil. Vent open to atmosphere.
  • Used and in excellent condition. Discontinued Kohler part # A-235418-S. $9.00 each, plus shipping & handling. (When available.)
Crankcase Breather Cover. Fits Kohler AQS "Quiet Line" engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361 with the oblong shape metal air cleaner/filter assembly. Replace bent, damaged or rusted cover to prevent leaking oil. Vent hole accepts PCV neoprene rubber breather hose/tube(s) listed below. OEM Kohler part # 47 096 01-S.
  • Used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)
  • New. $18.55 each, plus shipping & handling.
Neoprene Rubber Crankcase Breather Vent Hose/Tube. Approximately 4" unextended length. Fits Kohler AQS "Quiet Line" engine model K181 with specification numbers 301000-301058, and Magnum M8 with specification numbers 301500-301656. Replace cracked, dry-rotted or missing breather hose/tube to prevent dirty/dusty outside air from entering combustion chamber, which will cause excessive engine wear. Fastens between base of metal air cleaner/filter assembly and crankcase breather cover. Part of positive crankcase ventilation (PCV) system; vents back-pressure from inside crankcase into air intake to help oil stay clean longer.
  • OEM Kohler part # 41 326 02-S. $19.55 each, plus shipping & handling.


Neoprene Rubber Crankcase Breather Vent Hose/Tube. 3-11/32" overall length. Fits various Kohler Magnum engine models M10, M12, M14 and M16. Replace cracked, dry-rotted or missing breather hose/tube to prevent dirty/dusty outside air from entering combustion chamber, which will cause excessive engine wear. Fastens between base of air cleaner/filter assembly and crankcase breather cover. Part of positive crankcase ventilation (PCV) system; vents back-pressure from inside crankcase into air intake to help oil stay clean longer.

  • Used and in excellent condition or New Old Stock. Discontinued Kohler part # 47 326 03-S. $15.00 each, plus shipping & handling. (When available.)


Neoprene Rubber Crankcase Breather Vent Hose/Tube. 3-17/32" overall length. Fits Kohler K-series AQS "Quiet Line" engine models K241, K301, K321, K341 and K361. Used on Cub Cadet garden tractor models 800, 1000, 1200, 1250, 1450 and 1650. Replace cracked, dry-rotted or missing breather hose/tube to prevent dirty/dusty outside air from entering combustion chamber, which will cause excessive engine wear. Fastens between base of oblong shape metal air cleaner/filter assembly and crankcase breather cover. Part of positive crankcase ventilation (PCV) system; vents back-pressure from inside crankcase into air intake to help oil stay clean longer.

  • OEM Kohler part # 47 326 01-S. $17.50 each, plus shipping & handling.


Neoprene Rubber Crankcase Breather Vent Hose/Tube. 3-29/32" overall length. Fits various Kohler Magnum engine models M10, M12, M14 and M16. Replace cracked, dry-rotted or missing breather hose/tube to prevent dirty/dusty outside air from entering combustion chamber, which will cause excessive engine wear. Fastens between base of air cleaner/filter assembly and crankcase breather cover. Part of positive crankcase ventilation (PCV) system; vents back-pressure from inside crankcase into air intake to help oil stay clean longer.
  • Used and in excellent condition or New Old Stock. Discontinued Kohler part # 47 326 04-S. $35.00 each, plus shipping & handling. (When available.)


Neoprene Rubber Crankcase Breather Vent Hoses/Tubes. Fits various opposed twin cylinder Kohler engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18, M20, CV18, CV20, CV22, CV23, CV25, CV620, CV624, CV640, CV670, CV675, CV680, CV724, CV730, CV740, CV745 and CV750, according to specification number. Replace cracked, dry-rotted or missing breather hose/tube to prevent dirty/dusty outside air from entering combustion chamber, which will cause excessive engine wear. Fastens between base of air cleaner/filter assembly and crankcase breather cover. Part of positive crankcase ventilation (PCV) system; vents back-pressure from inside crankcase into air intake to help oil stay clean longer.
  • New Style. Approximately 3-5/8" Unextended Length. OEM Kohler part # 25 326 06-S. $14.10 each, plus shipping & handling.
  • Old Style. Approximately 3-3/8" Unextended Length. OEM Kohler part # 52 326 06-S. $26.50 each, plus shipping & handling.


The items listed below can be used to convert Kohler AQS "Quiet Line" engine models K241, K301, K321, K341, K361, or Magnum engine models M10, M12, M14, M16 with the positive crankcase ventilation (PCV) crankcase breather cover to open atmospheric vent. Makes for a nice, distinctive appearance. Use with 1/2" metal hole plug (listed below) in air cleaner base.
  • 1/4" NPT x 3/8" Barb 90º Angle Brass Fitting. Use with metal hole plug listed below. Use 1/4" NPT hand tap to cut threads in cover to accept this fitting. $10.00 each, plus shipping & handling.
  • 1-5/8" unextended length Neoprene Rubber Crankcase Breather Vent Hoses/Tube. Originally designed for Kohler engine models CH18, CH730 and CH740. OEM Kohler part # 24 326 86-S. $5.95 each, plus shipping & handling.
  • 2" unextended length Neoprene Rubber Crankcase Breather Vent Hoses/Tube. Originally designed for Kohler engine models CH18, CH20, CH23, CH640, CH730, CH740, CV18, CV20, CV22, CV23, CV25, CV620 and CV640. OEM Kohler part # 24 326 83-S. $3.45 each, plus shipping & handling.
  • 3-5/8" unextended length Neoprene Rubber Crankcase Breather Vent Hoses/Tube. Originally designed for Kohler engine models 61508, 61532, 61533, 61537, 61540, 61547, 61553, 61554, 61557, 61558, 65508, 65530, 65534, 65538, 65550, 65551, 65552, 65553, 65557, 65582, 65599, 65609, 67508, 67515, 67527, 67529, 67541, 67544, 67552, 69511, 69526, 69537, 72509, 75518, CV620, CV640 and CV640. Also fits certain single cylinder Wisconsin engines. OEM Kohler part # 24 326 87-S. $7.50 each, plus shipping & handling.


1/2" Metal Hole Plug. Use to block-off/plug AQS breather vent hole in base of oblong shape metal air cleaner/filter assembly on Kohler AQS "Quiet Line" engine models K241, K301, K321, K341 and K361, and Magnum engine models M10, M12, M14 and M16. Use with brass fitting or neoprene rubber crankcase breather vent hoses/tubes listed above. Apply clear RTV silicone adhesive sealant for an air-tight seal, and bend locking tangs outward/hammer flat to secure permanently in hole. $2.00 each, plus shipping & handling.

FYI: The governor assembly to crankcase vent breather hoses/tubes (Kohler part #'s 277392-S and X-484-1-S) for Kohler engine models K482, K532 and K582 are no longer available from Kohler. Use a neoprene rubber or vinyl hose or tubing of the appropriate size as a replacement.

Cylinder Head Welding Repairs, New and Reconditioned OEM Kohler Cylinder Heads - Click here to contact A-1 Miller's for FREE honest and accurate technical support and/or for ordering information and payment options. Please contact A-1 Miller's if you need a part or parts, or service(s) performed that's not listed or mentioned in this website. [Top of Page]
A-1 Miller's Professional Repair Service - Resurface air-cooled small engine flathead or OHV cylinder head on wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness for better sealing of head gasket and prevent possibility of burning-out of [high dollar] head due to severe warpage. (Sanders are not just for woodworking.) Includes deburring of sharp edge around combustion chamber to prevent detonation or pre-ignition. Click or tap here for cylinder head bolt torque specs. $10.00 labor, plus return shipping & handling.

NOTE - If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for.

A-1 Miller's Professional Repair Service - Mill approximately .050" from Kohler K241, M10, K301, M12, K321, M14, K341 or M16 cylinder head to raise compression ratio approximately .75:1 to increase horsepower and torque. Includes remove prominent/raised gasket mating surface from head and deburr sharp edge around combustion chamber to prevent detonation or pre-ignition. Click or tap here for cylinder head bolt torque specs. $25.00 labor each, plus return shipping & handling.

NOTE: To lessen the chance of a blown or leaking head gasket, clean out the head bolt hole threads with a tap, and seal the head gasket with Copper RTV Silicone Sealant (VersaChem - Mega Copper Silicone, Permatex® Ultra Copper® Maximum Temperature RTV Silicone Gasket Maker or Copper SPRAY-A-GASKET Hi Temp Adhesive Sealant) on each side of the head gasket or cylinder head and engine block to prevent a blown or leaking head gasket. Because engine heat has very little effect on silicone rubber. It's made of fine-ground up heat-transferring compressible copper mixed with silicone. Walmart and most auto parts stores sell copper RTV silicone sealant. It doesn't matter which brand to use, they work the same.

A-1 Miller's Professional Repair Service - Professionally weld up burned-out gasket surface in small engine cylinder head, resurface on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness, and redrill bolt hole, if needed. The welding process involves grinding away the impurities in the aluminum, and the aluminum welding becomes integrated with or part of the aluminum in the head, resulting in superior bonding with no separation whatsoever. NOTE - As long as there's no cracks in the head, it can be successfully welded up, resurfaced, and the bolt hole redrilled. IMPORTANT - The two causes of a burn-out are: 1) Throttle shaft in the carburetor is severely worn, allowing extra air in the combustion chamber, which will lean out the air/fuel mixture at high RPM; 2) The adjustable high speed main air/fuel mixture screw is set too lean; 3) The engine is ran above 3,200 RPM with a [Walbro] carburetor having a fixed/non-adjustable high speed main jet. To prevent the burn-out from happening again, either of these things should be fixed correctly before the cylinder head (engine) is put back into service. $75.00 for welding and machining, plus return shipping & handling. If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for.


A-1 Miller's Professional Repair Service - Drill out rusted-in/broken off [1/4"] bolt in cylinder head and retap threads for fastening of baffle shields (sheet metal) and/or brackets. No need to purchase another hard-to-find cylinder head that's in good condition. Includes resurfacing of head on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. NOTE: Always apply anti-seize compound on threads of bolt before installing. $10.00 each labor, plus return shipping & handling. IMPORTANT: Click or tap here for cylinder head bolt and spark plug torque specs. NOTE: If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for.

A-1 Miller's Professional Repair Service - Install Heli-Coil thread repair insert in stripped-out 14mm spark plug hole if not larger than 5/8" in diameter. No need to purchase another hard-to-find high dollar cylinder head that's in good condition. 304 stainless steel w/200,000 psi tensile strength. Includes resurfacing of head on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. $20.00 each for all parts and labor, plus return shipping & handling. IMPORTANT: Click or tap here for cylinder head bolt and spark plug torque specs. NOTE: If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for.

A-1 Miller's Professional Repair Service - Weld up excessively enlarged spark plug threaded hole, machine [lump of] welding even with head, and professionally drill and tap new 14mm spark plug threads perpendicular with the head. The welding process involves grinding away the impurities in the aluminum, and the aluminum welding becomes integrated with or part of the aluminum in the head, resulting in superior bonding with no separation whatsoever. No need to purchase another hard-to-find high dollar cylinder head that's in good condition. Includes resurfacing of head on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. $120.00 each for welding and machining, plus return shipping & handling. IMPORTANT: To prevent stripping the threads, do not over tighten spark plug! Torque spark plug to 180-240 in. lb. or 15-20 ft. lb. Click or tap here for cylinder head bolt and spark plug torque specs. NOTE: If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for.

Mill out exhaust valve cavity in LP and 2nd generation cylinder head to clear the larger 1-3/8" exhaust valve. $25.00 labor, plus return shipping & handling.

A-1 Miller's Professional Repair Service - Repair stripped spark plug threads with a Heli-Coil insert in YOUR cylinder head and/or drill out broken bolt and retap threads for fastening of baffle shields (sheet metal). Includes resurfacing of head to remove any warpage and restore flatness. $25.00 - $45.00 parts and labor, depending on extent of repair.

A-1 Miller's Professional Repair Service - Weld up excessively enlarged spark plug threads, machine (mill) welding flat, and drill and tap new 14mm spark plug threads. No need to purchase another hard-to-find cylinder head that's in good condition. Labor includes resurfacing of air-cooled small engine cylinder head on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. $120.00 each for welding and machining, plus return shipping & handling.

Cylinder Head. Fits Kohler engine models K141, K160/K161, K181 and M8. Cleaned and resurfaced on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. No cracks. Cooling fins, spark plug threads and bolt holes for fastening of baffle shields (sheet metal) all in good condition. IMPORTANT: Click or tap here for cylinder head bolt and spark plug torque specs. NOTE: If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for.
  • Used and in excellent condition. Discontinued Kohler part # 41 015 02-S (most common part). $125.00 each, plus shipping & handling. (When available.)


1st Generation High Compression "LP" Cylinder Head. Fits Kohler K-series engine models K241, K301 and K321 with the small (1-1/8") exhaust valve. Also fits certain Kohler Magnum engine models M10 and M12. Spark plug located in middle of combustion chamber. Due to the location of the spark plug, this head is not designed for use on a K-series AQS "Quiet Line" engine. Rare, hard to find part nowadays. The number embossed on this head is 235461. Requires 2" length head bolts. It has a heart-shape combustion chamber with no depression over the piston. Spark plug located in middle of combustion chamber. Cleaned and resurfaced on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. No cracks. Cooling fins, spark plug threads and bolt holes for fastening of baffle shields (sheet metal) all in good condition. IMPORTANT: Click or tap here for cylinder head bolt and spark plug torque specs. NOTE: If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for.
  • Used and in excellent condition. Discontinued Kohler part # 236546, and discontinued Cub Cadet part # IH-385303-R1. $200.00 each, plus shipping & handling. (When available.)


2nd Generation Cylinder Head. Fits Kohler K-series engine models K241, K301 and K321 with the small (1-1/8") exhaust valve. Also fits certain Kohler Magnum engine models M10 and M12. Spark plug located in middle of combustion chamber. Due to the location of the spark plug, this head is not designed for use on a K-series AQS "Quiet Line" engine. It has a heart-shape combustion chamber with a depression over the piston. Cleaned and resurfaced on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. No cracks. Cooling fins, spark plug threads and bolt holes for fastening of baffle shields (sheet metal) all in good condition. IMPORTANT: Click or tap here for cylinder head bolt and spark plug torque specs. NOTE: If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for.
  • Used and in excellent condition. Head with short bolt hole bosses; requires 1-1/2" length head bolts. Discontinued Kohler part # 236675. $85.00 each, plus shipping & handling. (When available.)
  • Used and in excellent condition. Head with tall bolt hole bosses; requires 2" length head bolts. Discontinued Kohler part #'s 236546 and 235475. $75.00 each, plus shipping & handling. (When available.)


3rd Generation Cylinder Head. Fits Kohler K-series engine models K241, K301 and K321. Also fits certain Kohler Magnum engine models M10, M12 and M14. Spark plug located in middle of combustion chamber. Due to the location of the spark plug, this head is not designed for use on a K-series AQS "Quiet Line" engine. It has a D-shape combustion chamber with a depression over the piston. Cleaned and resurfaced on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. No cracks. Cooling fins, spark plug threads and bolt holes for fastening of baffle shields (sheet metal) all in good condition. Requires 1-1/2" length head bolts. IMPORTANT: Click or tap here for cylinder head bolt and spark plug torque specs. NOTE: If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for.
  • Used and in excellent condition. Discontinued Kohler part # 237829. $75.00 each, plus shipping & handling. (When available.)
  • New high quality aftermarket OEM Kohler-replicated K241, M10, K301, M12, K321 or M14 cylinder head. $175.00 each, plus shipping & handling.


4th Generation Cylinder Head. Fits Kohler K-series AQS "Quiet Line" engine models K241, K301 and K321. Also fits certain Kohler Magnum engine models M10, M12 and M14. Spark plug located over exhaust valve. Has a D-shape combustion chamber with a depression over the piston. Cleaned and resurfaced on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. No cracks. Cooling fins, spark plug threads and bolt holes for fastening of baffle shields (sheet metal) all in good condition. Each listed below requires 1-1/2" length head bolts. IMPORTANT: Click or tap here for cylinder head bolt and spark plug torque specs. NOTE: If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for.
  • Used and in excellent condition. Discontinued Kohler part # 237670. $150.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 237830-S.$310.00 each, plus shipping & handling.


Kohler engine model K341 16hp Cylinder Head. Cleaned and resurfaced on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. No cracks. Cooling fins, spark plug threads and bolt holes for fastening of baffle shields (sheet metal) all in good condition. Requires 1-1/2" length head bolts. NOTE: If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for.
  • Used and in excellent condition. Discontinued Kohler part #'s 45 015 03-S, 45 015 04-S, 45 015 06-S or 45 015 09-S. $200.00 each, plus shipping & handling. (When available.)


A-1 Miller's Professional Valve Repair Service for Kohler Engine Model K361 Cylinder Head. [Top of Page] This service is for an engine that does not blow blue smoke out the exhaust and burn oil. Performing a professional valve job restores full compression, which allows the engine to start quicker, idle smoothly without stalling, and (if the ignition timing and carburetor adjustments are set correctly, too), it will produce full power at top governed speed. Click or tap here for cylinder head bolt torque specs. And if you've ever wondered how the K361 rocker arms receive plenty of oil to keep them lubricated, when the engine is running at full governed speed, internal air pressure from the downward stroke of the piston forces crankcase oil through the pushrod tubes onto the rocker arms.

  • Repair loose valve seat with a new BRONZE valve seat. FYI - A replacement pressed-in steel valve seat will loosen, without a doubt, after a short time in an aluminum cylinder head, even if it's professionally installed. But a replacement pressed-in bronze seat will NOT loosen when professionally installed because the "roughness" of bronze surface grips or adheres to aluminum much better than the "slick" surface of a steel seat. Plus, being bronze is actually harder than cast iron, it will wear very little and hold up to extreme heat, even for the exhaust side. $75.00 each for parts and labor, plus return shipping & handing.
  • Repair worn inside of valve guide with a thin-wall bronze sleeve insert. $20.00 each for parts and labor, plus return shipping & handing.
  • Replace loose guide valve with an oversize O.D. guide. $40.00 each for parts and labor, plus return shipping & handing.
  • Resurface head gasket mating surface to remove any warpage and restore flatness. $20.00 labor, plus return shipping & handing.
  • Perform valve job (regrind both valve faces and seats) to OEM angles, lap-in valves, install new valve stem seal, reinstall valves, springs, rotators and keepers/locks/collets. $45.00 labor, plus return shipping & handling.
  • If necessary after performing valve job, replace both original OEM 1-9/16" length valve springs with OEM Kohler 1-3/4" length springs so engine will produce more power at full governed speed without erratic valve behavior or misfire. $20.00 extra for both springs.
  • Gaskets to Reinstall Rebuilt K361 Cylinder Head on Engine. (Each part listed below included in the full engine rebuild gasket set.)
    • Head gasket. High quality aftermarket. Discontinued Kohler part # 45 052 02-S. $24.00 each, plus shipping & handling.
    • Rocker arm housing gasket. High quality aftermarket. Discontinued Kohler part # 45 041 14-S. $15.00 each, plus shipping & handling.
    • Rocker arm cover gasket. OEM Kohler part # 45 041 09-S. $8.00 each, plus shipping & handling.
    • Two pushrod tube neoprene rubber O-rings. (Kohler part # 45 153 01-S. $2.00/two, plus shipping & handling.
    • Intake tube mounting gasket. Kohler part # 271030-S. $1.00 each, plus shipping & handling.

FYI - I have found that the Kohler K361 18hp OHV cylinder head use the longer 1-3/4" valve spring (uncompressed length; discontinued Kohler part # 235010-S) with rotators for both valves, the same spring that certain early K241, K301 and K321 engines use with the stamped retainer. And of course, certain later K241, K301, K321, and all K341 engines have the shorter 1-9/16" spring (uncompressed length; discontinued Kohler part # 235168-S) with the rotator. Anyway, the official Kohler parts manual says that the K361 use the shorter 1-9/16" springs (with rotators) for both valves, but apparently, it's wrong! It obviously requires the longer 1-3/4" springs (with rotators). And of all the K361 engines that I've rebuilt through the years, with the 1-3/4" springs and rotators installed, there is no coil bind. Coil bind is when the coils of the spring make contact with each other at maximum valve lift. I've had a customer send his K361 head to me for repairs, and when I spoke to him on the phone about his engine, he mentioned that the engine had always made a chattering/rattling sound at full governed speed and lacked sufficient power. So I checked the valve springs, and sure enough, it had the shorter 1-9/16" springs (with rotators). My customer was lucky it didn't drop a valve. That would've been a nightmare! So I installed a set of the longer 1-3/4" springs (with rotators). The valves felt stiffer when I pushed down on them with my hand, too. - Brian Miller


Kohler engine model K361 (OHV 18hp) Cylinder Head Assembly. Professionally rebuilt and fully assembled. Includes valves, springs, rotators, stabilizers and keepers. Cleaned and resurfaced on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. No cracks. Cooling fins, spark plug threads and bolt hole threads are in good condition. Valve seats and/or valve guides reground or replaced, if necessary. NOTE: If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for. Each head listed below is used and in excellent condition. Discontinued Kohler part #'s 45 318 04 -S and 45 755 10-S.

  • With rebuildable core trade-in/exchange. $250.00 each, plus shipping & handling. (When available.)
  • Outright with no core trade-in/exchange. $400.00 each, plus shipping & handling. (When available.)
  • Gasket kit to reinstall rebuilt K361 cylinder head on engine. $50.00 each, plus shipping & handling.
  • New head bolts. Fits Kohler engine model K361. 3/8" diameter x 1-1/2" thread length grade 8 bolts and hardened washers. OEM Kohler part #'s 270721-S (bolt; discontinued from Kohler), 270889-S (washer).
    • High quality aftermarket. Set of 6 bolts only. $6.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 6 bolts and 6 washers. $9.00 per set, plus shipping & handling.
"L-Shape" Baffle Shield (Sheet Metal) and Ignition Coil Mounting Bracket. Fits cylinder head on Kohler AQS "Quiet Line" engine models K241, K301 and K321. Due to the larger cylinder head, the K341 do not require this part. This is NOT a lifting strap. Used on Cub Cadet garden tractor models 680, 1000, 1200, 1250, 1282, 1450, and various other makes and models of garden tractors. Replace a broken bracket (due to a loose mounting bolt without a lock washer). This part mounts on the farthest cylinder head bolt located on the starter side of the engine for fastening top and side baffle shields (sheet metal) and ignition coil. FYI: If your part is broken, it can be welded back together to give many more years of quality service.
  • A-1 Miller's fabricated part. Replaces discontinued Kohler part # 47 126 04-S, and discontinued Cub Cadet part #'s IH-117231-C1, KH-47-126-04-S. $10.00 each, plus shipping & handling.
Baffle Shields. Fits beside cylinder on Kohler AQS "Quiet Line" engine models K241, K301 and K321, including various Magnum engine models M10, M12, M14 and M16. Used on Cub Cadet garden tractor models 680, 1000, 1200, 1250, 1282, 1450, 1650, and various other makes and models of garden tractors. Replace a cracked or broken baffle shield (due to loose mounting bolts without lock washers). This part mounts on the right side/starter side of engine (when facing the flywheel) to deflect cooling air around cylinder and for fasten of ignition coil bracket.
  • New. Made of sheet metal (same quality as OEM part). OEM Kohler part # 47 063 05-S. $55.00 each, plus shipping & handling.
  • Heavy Duty Aftermarket. Made of 1/8" mild steel for durability. A-1 Miller's fabricated part. $30.00 each, plus shipping & handling.
High Quality Cylinder Head Bolts and Flat Washers. Fits Kohler engine models K141, K160/K161, K181 and M8. Reusable - these will not stretch overtime and are not "torque to yield" bolts. OEM Kohler head bolts can be reused multiple times. But replace bolts with eroded, rusted heads to prevent socket from slipping so bolt can be torqued correctly to prevent a blown head gasket and/or warped head. 5/16" diameter x 1-1/2" thread length grade 8 bolts and hardened washers. NOTES: Clean the bolt holes with a 5/16-18 UNC plug hand tap, then apply motor oil on the threads so the bolts will torque correctly. Torque each bolt to 240 in. lbs. or 20 ft. lbs. Liquid threadlocker is not necessary. Click or tap here for cylinder head bolt torque specs. [Return To Previous Paragraph, Section or Website]
  • High quality aftermarket. Set of 7 bolts only. $7.00 per set, plus shipping & handling.
  • High quality aftermarket. Set of 7 bolts and 7 washers. $10.50 per set, plus shipping & handling.
  • OEM Kohler part #'s 41 086 02-S (bolt), 220534-S (washer). $49.35 per set, plus shipping & handling.


High Quality Cylinder Head Bolts and Flat Washers. Fits Kohler engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20. Reusable - these will not stretch overtime and are not "torque to yield" bolts. OEM Kohler head bolts can be reused multiple times. But replace bolts with eroded, rusted heads to prevent socket from slipping so bolt can be torqued correctly to prevent a blown head gasket and/or warped head. 5/16" diameter x 1-1/2" thread length grade 8 bolts and hardened washers. NOTES: Clean the bolt holes with a 5/16-18 UNC plug hand tap, then apply motor oil on the threads so the bolts will torque correctly. Torque each bolt to 240 in. lbs. or 20 ft. lbs. Liquid threadlocker is not necessary. Click or tap here for cylinder head bolt torque specs. [Return To Previous Paragraph, Section or Website]

  • High quality aftermarket. Set of 9 bolts only. $9.00 per set, plus shipping & handling.
  • High quality aftermarket. Set of 9 bolts and 9 washers. $13.50 per set, plus shipping & handling.
  • OEM Kohler part #'s 41 086 02-S (bolt), 220534-S (washer). $63.45 per set, plus shipping & handling.


High Quality Cylinder Head Bolts and Flat Washers. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361 listed below. Reusable - these will not stretch overtime and are not "torque to yield" bolts. OEM Kohler head bolts can be reused multiple times. But replace bolts with eroded, rusted heads to prevent socket from slipping so bolt can be torqued correctly to prevent a blown head gasket and/or warped head. NOTES: Clean the bolt holes with a 3/8-16 UNC plug hand tap, then apply motor oil on the threads so the bolts will torque correctly. Torque each bolt to 360 in. lbs. or 30 ft. lbs. Liquid threadlocker is not necessary. And the length of any bolt (or screw) do not include the head itself. They are measured from under the head to end of the threads. Bolt lengths below determined by type of cylinder head used. Click or tap here for cylinder head bolt torque specs. [Return To Previous Paragraph, Section or Website]

  • Fits Kohler engine models K241, M10, K301, M12, K321 and M14. 3/8" diameter x 1-1/2" thread length grade 8 bolts and hardened washers. These are for OEM heads with recessed bolt holes that's lower than the height of the cooling fins.
    • High quality aftermarket. Set of 9 bolts only. $9.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 9 bolts and 9 washers. $13.50 per set, plus shipping & handling.
    • OEM Kohler part #'s 25 086 115-S (bolt), 270889-S (washer). $64.75 per set, plus shipping & handling.
  • Fits Kohler engine models K241, M10, K301, M12, K321 and M14. 3/8" diameter x 2-1/4" thread length grade 8 bolts and hardened washers. These are for OEM heads with bolt holes that's the same height as the cooling fins, and with no mounting bracket/plate under the bolt head. Kohler part #'s 271077 (bolt; discontinued from Kohler), 270889-S (washer).
    • High quality aftermarket. Set of 9 bolts only. $9.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 9 bolts and 9 washers. $13.50 per set, plus shipping & handling.
  • Fits Kohler engine models K241, M10, K301, M12, K321 and M14. 3/8" diameter x 2-1/2" thread length grade 8 bolts and hardened washers. These are for OEM heads with bolt holes that's the same height as the cooling fins, and with a gas tank mounting bracket or other type of mounting bracket/plate fastened under the bolt heads.
    • High quality aftermarket. Set of 9 bolts only. $9.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 9 bolts and 9 washers. $13.50 per set, plus shipping & handling.
    • OEM Kohler part #'s 235175-S (bolt), 270889-S (washer). $98.00 per set, plus shipping & handling.
  • Fits Kohler engine models K341 and M16. 3/8" diameter x 1-1/2" thread length grade 8 bolts and hardened washers.
    • High quality aftermarket. Set of 10 bolts only. $10.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 10 bolts and 10 washers. $15.00 per set, plus shipping & handling.
    • OEM Kohler part #'s 25 086 115-S (bolt), 270889-S (washer). $69.70 per set, plus shipping & handling.
  • Fits Kohler engine model K361. 3/8" diameter x 1-1/2" thread length grade 8 bolts and hardened washers. OEM Kohler part #'s 270721-S (bolt; discontinued from Kohler), 270889-S (washer).
    • High quality aftermarket. Set of 6 bolts only. $6.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 6 bolts and 6 washers. $9.00 per set, plus shipping & handling.


High Quality Aftermarket Single Cylinder Head Stud Kits. These studs can be reused multiple times. These will not stretch overtime and are not "torque to yield" studs. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361 with an OEM or Billet Head. Each kit includes 3/8" diameter x 2" or 2-3/4" length high quality heat-treated studs, grade 8 nuts and hardened flat washers. I can also make the head studs any length you want. The ones that's listed here are the most common lengths. When installed correctly and torqued to specs, head studs provide even torque pressure for better head gasket sealing. Plus, with a thinner cylinder wall with a huge, oversized piston, they help maintain cylinder wall stability and straightness for better ring seal to lessen the loss of compression. Thoroughly tested for several years of continuous use under pulling conditions, for Kohler engine models, hardened and heat-treated coarse thread studs, along with grade 8 nuts and washers, works just fine, with no problems. The nuts maintain their torque as long as they're tightened to the correct torque specs. And make sure at least 3/4" of threads are in the block so the cylinder wall will not distort and threads in block will not strip out when the nuts are torqued to specs. Click or tap here for cylinder head bolt torque specs. Also, stud length is determined by type of cylinder head. The OEM head with short bolt holes require 2" length studs, the head with tall bolt holes require 2-3/4" length studs. Please indicate length of studs when placing order. IMPORTANT: As with any threaded stud, apply medium strength liquid threadlocker (Blue Loctite, Permatex or equivalent) on threads that goes in the block and tighten with pliers to prevent stud from loosening. Use a hardened steel flat washer under nut to distribute load evenly on head and apply motor oil on exposed threads so nut will torque correctly. Torque each nut to 360 in. lbs. or 30 ft. lbs. in correct sequence. FYI - When storing an opened container of liquid threadlocker or Super Glue, store it upright and not laying flat. The [capped] tip will not dry out and clog when stored upright. An ingenious and innovative concept by Brian Miller. Please do not accept advertised copycat parts of this kind. (But I do appreciate them acknowledging my ingenuity and intelligence.) [Return To Previous Paragraph, Section or Website]

  • Fits Kohler engine models K241, M10, K301, M12, K321 and M14. Available in 2", 2-3/4" or 3-1/4" (OEM) lengths (please specify length). Set of 9 studs, nuts and washers. $20.00 per set, plus shipping & handling.
  • Fits Kohler engine models K341 and M16. 2" length. Set of 10 studs, nuts and washers. $22.00 per set, plus shipping & handling.
  • Fits Kohler engine model K361. 2" length. Set of 6 studs, nuts and washers. $13.00 per set, plus shipping & handling.


OEM Kohler Cylinder Head Studs. Fits Kohler engine models K241, M10, K301, M12, K321, M14, K341 and M16. Dimensions of each stud: 3/8-16 UNC (coarse thread) threads; 3-1/4" overall length; short threaded length: 5/8"; long threaded length: 1-7/8". NOTE: OEM Kohler head studs can be reused multiple times. These will not stretch overtime and are not "torque to yield" studs. " IMPORTANT: As with any threaded stud, apply medium strength liquid threadlocker (Blue Loctite, Permatex or equivalent) on threads that goes in the block and tighten with pliers to prevent stud from loosening. Use a hardened steel flat washer under nut to distribute load evenly on head and apply motor oil on exposed threads so nut will torque correctly. Torque each nut to 360 in. lbs. or 30 ft. lbs. in correct sequence. FYI - When storing an opened container of liquid threadlocker or Super Glue, store it upright and not laying flat. The [capped] tip will not dry out and clog when stored upright.

  • Used and in excellent condition. OEM Kohler part #'s 237277-S (discontinued) or 237522-S. $5.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 237522-S. $11.50 each, plus shipping & handling.


Steel Spacers for 2-1/2" Length Head Bolts or Studs (listed above). Most commonly used when replacing an OEM Kohler K241, K301 or K321 cylinder head with bolt hole bosses that's the same height as the cooling fins with a cylinder head with recessed bolt hole bosses when using a gas tank mounting bracket or other kind of flat bracket. IMPORTANT: Place spacer above thick flat washer on cylinder head. Dimensions: 13/32" I.D. x 5/8" O.D. x 5/8" height.

  • A-1 Miller's high quality machined aftermarket part. Replaces Kohler part # X-400-91-S. $8.00 each, plus shipping & handling.
  • OEM Kohler part # X-400-91-S. $10.60 each, plus shipping & handling.

Engine Cooling Fan, Reconditioned OEM Kohler Flywheels, Crankshafts and Main Bearings - | Click here to contact A-1 Miller's for FREE honest and accurate technical support and/or for ordering information and payment options. Please contact A-1 Miller's if you need a part or parts, or service(s) performed that's not listed or mentioned in this website. [Top of Page]

Superior Quality, High Velocity 12 Volt Auxiliary Engine Cooling Fan. Use an electric fan to cool a competition garden tractor pulling engine with a steel flywheel and no cooling fins. Unlike fan blades that's fastened to the flywheel, an electric fan will not produce drag and rob power from the engine. Install fan with motor forward of blades (for maximum velocity) aimed toward exhaust area of engine. Fasten fan housing on a sturdy angle steel support brace with 1/4" bolts, flat washers, lock washers and nuts, in front of engine or behind grille in a garden tractor. See photos to the right and below. No need to mount fan housing on rubber grommets; these will serve no purpose whatsoever. Fan motor is 100% secured and reinforced to plastic housing to withstand severe engine vibrations to prevent motor from loosening and become inoperable when pulling. Distinctive feature by A-1 Miller's. Draws 2.6 amps, produces 145 CFM. Measures 3" diameter and 5" length. IMPORTANT: It's recommended that the fan not be run while pulling because due to normal engine vibration, the brush holders inside motor could break. Turn fan on ONLY between pull-offs or when tuning engine. $40.00 each, plus shipping & handling.

Precision CNC Machined 9-1/2" Diameter Steel Flywheels. Click or tap here to learn how to install the ring gear. (Posted 3/1/24)
  • 19 lb. Steel Flywheel w/o Ring Gear. (Customer supplies and installs own ring gear.) $263.00 each, plus shipping & handling.
  • 19 lb. Steel Flywheel w/Installed Ring Gear. $303.00 each, plus shipping & handling.
  • 32 lb. Steel Flywheel w/o Ring Gear. (Customer supplies and installs own ring gear.) $263.00 each, plus shipping & handling.
  • 32 lb. Steel Flywheel w/Installed Ring Gear. $303.00 each, plus shipping & handling.


Kohler K181 Flywheel for the 5-1/2" 15/20 Amp Charging Stator. Replace damaged flywheel, or use this type of flywheel with the 5-1/2" stator to convert a K181 engine with a stator containing a failed magneto ignition coil integrated with a weak output 10 amp charging coils under the flywheel to the battery-powered ignition system. OEM Kohler part # 41 025 17-S.

  • Used and in excellent condition. $250.00 each, plus shipping & handling. (When available.)
  • New. $505.08 each, plus shipping & handling.
Precision Dynamic Spin-Balance Service - If your engine vibrates excessively or more than normal, and if the parasitic accessories or attachments are not out-of-balance, then chances are, the rotating assembly (crankshaft, connecting rod and piston assembly, and/or flywheel) needs to be precision balanced.
  • Dynamically Spin-Balance (cast iron or steel) flywheel for Kohler K241-K361 cast iron block engine. $75.00± each labor, plus return shipping & handling.
  • Dynamically Spin-Balance Kohler engine model K90/K91, K141, K160/K161, K181, M8, K241, M10, K301, M12, K321, M14, K341, M16 and K361 or virtually any other made and model of single cylinder small engine cast iron crankshaft with OEM or billet connecting rod and matching (OEM or aftermarket/high performance) piston assembly. $260.00± per rotating assembly, plus return shipping & handling.
  • Dynamically Spin-Balance single cylinder billet steel crankshaft with billet connecting rod and matching (OEM or aftermarket/high performance) piston assembly. (Tungsten steel slugs may be required.) $700.00± per rotating assembly, plus return shipping & handling.
  • ± means more or less. See important message below.

IMPORTANT --> Due to clumsy, incompetent and uncaring "gorilla" workers that may have a tendency to damage heavy items while handling packages at a shipping center, for better protection, please ship your crankshaft, connecting rod and piston assembly, and/or flywheel to A-1 Miller's address to be balanced, please enclose the items in two 12-1/4" x 12-1/4" x 6" USPS Large Flat Rate Boxes. Place one box inside the other to double the strength. Use one double-box to ship the crankshaft, connecting rod and piston assembly, and use another double-box to ship the flywheel only, and place rigid packing material under, around/between and over the parts to prevent damage during shipment. But for heavy items, ship delicate/fragile parts in a sturdy wooden crate with sufficient packing/stuffing under, around/between and over the parts. Include a note in the package or crate with your contact information and a description of what you want done. Or if you're the kind of person who don't trust delivery/shipping companies (mis)handling your high-dollar and fragile merchandise, you can make the long drive to A-1 Miller's shop to personally purchase parts, or drop off and/or pick up your carburetor, clutch assembly, engine parts, entire engine, transmission, transaxle, entire garden tractor, small motorized vehicle, etc., for repairing and/or rebuilding. "The road to a friend's house (or shop) is never long." Don't sacrifice quality workmanship for distance. [Return To Previous Paragraph, Section or Website]

Balance Gear Needle Bearings. For believers in using balance gears. Fits Kohler engine models K241, K301, K321, K341, K361, M10, M12, M14 and M16.
  • Fits Kohler engines with serial number before 9641311 (early 1979 and older). Fits old style balance gears with .6825"-.6828" center hole. OEM Kohler part # 236506-S. $53.70 each, plus shipping & handling.
  • Fits Kohler engines with serial number after 9641310 (late 1979 and newer). Fits new style balance gears with .6870"-.6875" (11/16") center hole. OEM Kohler part # 47 030 01-S. $18.30 each, plus shipping & handling.
A-1 Miller's Crankshaft Machine Repair Service - (Added 2/3/21)
  • Drill and tap flywheel end of Kohler K-series crankshaft for installation of 3/8" bolt when threads on integrated 5/8" stud are damaged beyond rethreading or when 5/8" stud breaks off. No need to purchase another high-dollar, hard to find crankshaft. Precision work performed in large metal lathe. Hardware include: 3/8-24 UNF grade 8 bolt, split lock washer and 3/8" x 5/8" adapter step washer. $55.00 for labor and hardware.
  • Drill and tap PTO end of Kohler crankshaft for installation of 3/8" bolt to retain electric PTO clutch or billet starter pulley. Precision work performed in large metal lathe. Hardware include: 3/8" grade 8 bolt, split lock washer and extra thick flat washer. $45.00 for labor and hardware.
  • Drill and tap flywheel end of Kohler K-series crankshaft for installation of 5/8" threaded steel stud when threads on integrated 5/8" stud are damaged beyond rethreading or when 5/8" stud breaks off. No need to purchase another high-dollar, hard to find crankshaft. Precision work performed in large metal lathe. Hardware include: Installation of 5/8-18 UNF stud, self-locking flywheel retaining nut and extra thick flat washer. $75.00 for labor and hardware.
Flywheel Retaining Nuts for 5/8" or 3/4" threaded stud on end of Kohler K-series and billet steel crankshafts. IMPORTANT: Apply thin coat of motor oil on threads of crankshaft before installing nut, then torque each nut to 65 ft. lbs.
  • Nylon Insert Self-Locking Nut. 5/8-18 UNF threads. Replaces Discontinued Kohler part # 25 100 02-S. $2.50 each, plus shipping & handling.
  • Nylon Insert Self-Locking Nut. 3/4-16 UNF threads. Used on early K241 crankshafts and most billet steel crankshafts. Replaces Discontinued Kohler part #'s X-89-11, X-119-16. $3.00 each, plus shipping & handling.
Flywheel Retaining Bolt and Washer Kit. Fits Kohler and various other makes and models of small engines with a 3/8" threaded hole in flywheel end of crankshaft. Includes: 3/8-24 UNF grade 8 bolt, split lock washer and extra thick flat washer. IMPORTANT: Apply thin coat of motor oil in threads of bolt, then torque to 40 ft. lb. High quality aftermarket. Replaces OEM Kohler part #'s 25 068 04, 25 068 24, 47 086 16, 47 086 18, 52 068 25 (bolt) and 12 468 03-S, 52 114 02, 52 468 15 (washer). $5.00 per kit, plus shipping & handling. Starter Pulley Retaining Bolt/Washer Kit for PTO end of crankshaft. Includes: 3/8" or 7/16" grade 8 bolt, split lock washer and extra thick flat washer. Certain professional pulling associations/clubs require this in case starter pulley comes loose on crankshaft and become an airborne projectile, which can cause serious injury to a bystander or spectator. Please indicate if you need the kit for a 3/8" or 7/16" bolt. $5.00 per kit, plus shipping & handling.
Extra Thick Flywheel / Aluminum Hub Adapter Retaining Washers. A thick, wide washer is a must to secure flywheel and prevent clutch/driveshaft aluminum hub adapter breakage. Each made of steel and measures 1-1/4" O.D. x approximately 1/4" thick.
  • Washers with 13/32" center hole. To be used with a crankshaft that has a 3/8" bolt, and/or aluminum hub adapter that has a 3/8" center hole.
    • Fabricated A-1 Miller's part. $3.00 each, plus shipping & handling.
    • OEM Kohler part #'s 12 468 03-S. $3.80 each, plus shipping & handling.
  • Washer with 5/8" center hole. To be used with a crankshaft that has a 5/8" stud, and/or aluminum hub adapter that has a 5/8" center hole. Fabricated A-1 Miller's part. Replaces discontinued Kohler part # X-25-104. $5.00 each, plus shipping & handling.
  • Washer with 3/4" center hole. To be used with a crankshaft that has a 3/4" stud, and/or aluminum hub adapter that has a 3/4" center hole. Fabricated A-1 Miller's part. Replaces discontinued Kohler part # X-25-71. $5.00 each, plus shipping & handling.
Adapter Step Washer. Use this part to center OEM cast aluminum or billet hub adapter with a 5/8" hole to a crankshaft with the 3/8" bolt on later model Kohler K-series and all Magnum engines. A must to prevent severe wobble/vibration and prevent hub and/or driveshaft/clutch breakage. Dimensions: 3/8" I.D. x 5/8" O.D. step x approximately 1-1/4" overall O.D. x 1/2" overall height. Professionally machined by A-1 Miller's.
  • $12.00 each, plus shipping & handling.
Cub Cadet garden tractor hub adapters with 5/8" center hole (early K-series), w/pulley, w/dowel pin.
  • Used and in excellent condition. OEM Kohler part # 41 071 03-S. $60.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 41 071 03-S. $90.73 each, plus shipping & handling.
  • New. OEM Cub Cadet part # KH-41-071-03. $116.30 each, plus shipping & handling.
  • New. OEM Cub Cadet part # 759-3287. $204.00 each, plus shipping & handling.


Cub Cadet garden tractor hub adapters with 5/8" center hole (early K-series), w/o pulley, w/dowel pin.

  • Used and in excellent condition. Discontinued Kohler part # 41 071 05-S. $60.00 each, plus shipping & handling.
  • New. OEM Cub Cadet part # KH-41-071-05. $204.00 each, plus shipping & handling.


Cub Cadet garden tractor hub adapters with 3/8" center hole (later K-series, all KT-series and Magnum), w/o pulley, w/dowel pin.

  • Used and in excellent condition. $40.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 52 755 61-S. $115.55 each, plus shipping & handling.
1/4" diameter x 3/4" length hardened steel dowel pin for OEM Kohler and billet aluminum hub adapters. Secures aluminum hub to flywheel to prevent slippage. Replaces Cub Cadet part # KH-X-56-7 and Kohler part # X-56-7. $1.50 each, plus shipping & handling.
Square Aluminum Flywheel/Crankshaft Key. Made of 6061 medium-grade hardness alloy aluminum. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181, M8, K241, K301, K321, K341, K361, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20 made in 1973 and later. Helps prevent damage of keyway in crankshaft and/or prevents the possibility of cracking/breaking of factory cast iron flywheel due to sudden crankshaft lock-up in the event of connecting rod failure. Dimensions: 3/16" square x 1-3/8" length. IMPORTANT: Thoroughly clean tapers inside flywheel and on crankshaft before installing flywheel! A proven, ingenious and innovative concept by Brian Miller. Please do not accept advertised copycat products of this kind. (But I do appreciate them acknowledging my ingenuity and intelligence.) A-1 Miller's part. Replaces Kohler [steel key] part # X-286-17-S. $5.00 each, plus shipping & handling.


Rectangular Steel Flywheel/Crankshaft Key. Fits Kohler engine models K241, K301 and K321 made in 1972 and earlier with the 8" diameter flywheel and starter/generator. Also fits Kohler engine models K330/K331. Dimensions: 3/16" wide x 1/4" tall x 1-3/8" length. IMPORTANT: Thoroughly clean tapers inside flywheel and on crankshaft before installing flywheel!

  • Used and in excellent condition. Discontinued Kohler part # X-366-1-S. $5.00 each, plus shipping & handling. (When available.)


Square Steel Flywheel/Crankshaft Keys. Fits Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181, M8, K241, K301, K321, K341, K361, KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20 made in 1973 and later. Dimensions: 3/16" square x 1-3/8" length. IMPORTANT: Thoroughly clean tapers inside flywheel and on crankshaft before installing flywheel!

  • High quality aftermarket. Made of mild steel. Replaces Kohler part # X-286-17-S. $1.00 each, plus shipping & handling.
  • OEM Kohler part # X-286-17-S. $2.10 each, plus shipping & handling.


Woodruff (Semicircular) Steel Flywheel/Crankshaft Key. Fits most OHV aluminum block Kohler engines. Dimensions: 3/16" wide x 5/8" length. IMPORTANT: Thoroughly clean tapers inside flywheel and on crankshaft before installing flywheel!

  • High quality aftermarket. $1.00 each, plus shipping & handling.
  • OEM Kohler part # X-42-15-S. $1.70 each, plus shipping & handling.


Woodruff (Semicircular) Steel Keys for Flywheel/Crankshaft and Gear Reduction Shaft on certain Kohler engine models K241, K301, K321, K341, and all Magnum models M10, M12, M14, M16, and models CH13 and CH15. Dimensions: 3/16" wide x 1" length. IMPORTANT: Thoroughly clean tapers inside flywheel and on crankshaft before installing flywheel!

  • High quality aftermarket. $1.00 each, plus shipping & handling.
  • OEM Kohler part # X-46-3-S. $2.25 each, plus shipping & handling.


Oil Level Check and Drain Plugs, Oil Filter Adapter, Oil Filters and OEM Kohler Cast Aluminum and Cast Iron Oil Pans - Click here to contact A-1 Miller's for FREE honest and accurate technical support and/or for ordering information and payment options. Please contact A-1 Miller's if you need a part or parts, or service(s) performed that's not listed or mentioned in this website. [Top of Page]
Oil Level Check and Drain Plugs with Tapered Threads and Square Head listed below. A-1 Miller's oil drain plugs have a super strong rare earth/neodymium magnet. Five times stronger than competitor's ceramic (ferrite) magnet and resists demagnetization. Plugs listed below can be used on various other makes and models of transmissions, transaxles, gearboxes and small engine crankcases. Tapered threads requires no sealing gasket or sealant, and threads will not strip out when tightened. To avoid cracking oil pan, do not over-tighten! When in doubt, use plumber's thread sealing tape to insure proper sealing of threads to prevent a possible oil leak. Universal application. Magnet attracts and removes ferrous metallic wear fragments from the motor oil or transmission/gearbox to reduce engine or gear/bearing wear. Sometimes some of the ferrous wear fragments settle to the bottom of the oil pan and do not drain out with the oil when performing an oil change, even when the oil is hot. Magnetic drain plugs are suitable for engines with splash oil lubrication (no oil pump/filter). The engine, transmission, transaxle or gearbox will last much longer with uncontaminated and cleaner oil. Remember - metal flake looks good in paint, not in oil.

FYI - If you don't know or can't find any information on the maximum oil quantity for any specific gear drive transmission, transaxle, right angle gearbox, or garden tiller sealed chaincase or gearbox, well, the unit in question is full when oil runs out of the oil level check/fill plug hole that's located halfway [of the drive axles or lower output shaft(s)] on the side(s), front or rear of the unit. All of these fill this way. When the unit is in motion, the lower gears in a transmission or transaxle picks up the oil and slings it on the upper gears, shafts and bearings to lubricate them. And in automotive rear ends, the ring gear picks up the oil and slings it on the pinion gear, spider gears, shafts and bearings to lubricate them. Due to high friction between the gear teeth in transmissions, transaxles, right angle gearboxes and garden tiller gearboxes, or an "open" (non-locking, free-spinning) rear end or in an automotive rear end with a Detroit Locker, SAE 90 weight gear oil must be used. But in an automotive Posi-Trac limited-slip differential, SAE 90W140 weight gear oil must be used to prevent chattering of the locking clutches going around turns. And due to much less friction of roller chain(s) on sprocket teeth in a sealed chaincase, 10W30, 10W40 or SAE 30 weight heavy duty motor oil can be safely used. In front-wheel-drive vehicles, the differential is typically built into the transmission or transaxle, and shares the same transmission fluid, rather it be SAE 90 weight gear oil for a manual shift transmission or ATF for an automatic transmission.


1/8" NPT Oil Level and Drain Plugs. (0.405" O.D. tapered threads.) All MTD-built Cub Cadet garden tractor aluminum housing creeper drive units are packed with grease from the factory. Therefore, for better lubrication and less wear inside the creeper drive unit, install ordinary plug on opposite side of unit of shifter to serve as an oil level check, and install magnetic plug on bottom of unit to attractive metallic wear fragments and drain/change the oil. Entire creeper unit must be completely disassembled and cleaned, a hole drilled midway on the side, another hole drilled on the bottom, and both holes will need to be threaded with an 1/8" NPT hand tap for the plugs. Then fill unit through the breather opening with SAE 90 weight gear oil. $8.00 for both plugs, plus shipping & handling.
1/4" NPT Magnetic Oil Drain Plug. (0.540" O.D. tapered threads.) Fits various Briggs & Stratton, Kohler, Tecumseh, and various other makes and models of small engines. A-1 Miller's part. Replaces discontinued Kohler part # X-75-2. $5.00 each, plus shipping & handling.
3/8" NPT Magnetic Oil Drain Plugs. (0.675" O.D. tapered threads.) Fits various Briggs & Stratton, Kohler, Tecumseh, and various other makes and models of small engines.
  • A-1 Miller's part. Replaces Kohler part # X-305-4-S. $5.00 each, plus shipping & handling.
  • OEM Kohler part # X-305-4-S. $18.35 each, plus shipping & handling.


1/2" NPT Magnetic Oil Drain Plug. (0.840" O.D. tapered threads.) Fits side of oil pan on Kohler engine models K141, K160/K161, KV161, L160/L161, L181, K181 and M8 engines, and oil drain on Cub Cadet garden tractor transaxles, various automotive manual shift transmissions, and various other makes and models of small engines. A-1 Miller's part. Not available from Kohler. $5.00 each, plus shipping & handling.
3/4" NPT Magnetic Oil Drain Plug. (1.050" O.D. tapered threads.) Fits various Briggs & Stratton, Kohler, Tecumseh, and various other makes and models of small engines. A-1 Miller's part. Not available from Kohler. $5.00 each, plus shipping & handling.
5/8" I.D. Fiber Sealing Gasket. Fits OEM Kohler 3/8" NPT Oil Drain Plug with Hex Head. Replaces discontinued Kohler part # 241063. $1.00 each, plus shipping & handling.
3/4-10 UNC (Straight Threads) Magnetic Oil Drain Plug. Use to replace OEM Kohler 3/8" NPT oil drain plug with stripped threads in [aluminum] oil pan. Includes fiber sealing gasket. NOTE: Threads in oil pan must be enlarged with a 3/4-10 UNC hand tap. A-1 Miller's part. $5.00 each, plus shipping & handling.
Super Strong Rare Earth/Neodymium Magnets for Engines, Transmissions, Transaxles and Gearboxes. Attracts and removes ferrous metallic wear fragments from the lubricating oil inside an engine that does not have an oil pump with an oil filter, or inside a transmission, transaxle or gearbox to lessen wear and noise to gears and bearings. Sometimes some of the wear fragments settle to the bottom of the oil pan, engine block or gearbox and do not drain out with the oil when performing an oil change, even when the oil is hot. Install magnet in bottom of oil pan away from the oil dipper and any moving parts, or in bottom of a transmission, transaxle or gearbox away from rotating gears and any moving parts. Use Krazy Glue, Super Glue, Gorilla Glue, or any industrial strength adhesive to secure magnet in place. The engine, transmission, transaxle or gearbox will last much longer with uncontaminated and cleaner oil. These rare earth/neodymium magnets are EXTREMELY strong! Use caution when handling! Can be difficult to remove from a steel or cast iron surface, are very brittle and can break easily if mishandled. Remember - metal flake looks good in paint, not in oil. A proven, ingenious and innovative concept by Brian Miller. Please do not accept advertised copycat products of this kind. (But I do appreciate them acknowledging my ingenuity and intelligence.) [Return To Previous Paragraph, Section or Website]
  • Rectangular Magnet. Dimensions: 20mm x 10mm x 2mm. Use in confined spaces, such as the deep sump oil pan for Cub Cadet garden tractor engines. $1.00 each, plus shipping & handling.
  • Round Magnet. Dimensions: 25mm x 2mm. Use in wide, open spaces or flat bottom oil pans. $1.00 each, plus shipping & handling.
Oil Filter Adapter Kit. Fits Kohler engine models KT17 Series II, KT19 Series II, MV16, M18, MV18, M20 and MV20. (Will not fit KT17 (first design), KT19 (first design) or KT21 engines because there is no provision on the block for an oil filter adapter.) Oil filter not included with kit; order separately (listed below). Having an oil filter helps the engine last much longer between oil changes by filtering out or removing small metallic wear fragments and solid contaminants from the oil that can cause excessive wear to the pistons, piston rings, cylinder walls, and especially the PTO end main journal on the crankshaft, resulting in low oil pressure, and possibly a burnt #1 connecting rod. Remember - metal flake looks good in paint, not in oil. NOTE: Use the 1/8" NPT Allen pipe plug (Kohler part # 25 139 60-S) to plug the hole in the adapter body on model M18 engines w/specification # 24532, after serial # 1835400002 (1988 and later) if the engine is not equipped with a low oil shut-off sensor, oil pressure switch or oil pressure gauge. However, the adapter body can be drilled and threaded with an 1/8" NPT tap to use a low oil shut-off sensor, oil pressure switch or oil pressure gauge on models KT17 Series II, KT19 Series II, MV16, M18, MV18, M20 and MV20.
  • Oil Filter Adapter Kit without Allen Pipe Plug. Includes: Cast aluminum oil filter adapter, two Allen head mounting bolts and new mounting gasket (part # 52 041 16-S). May or may not have the 1/8" NPT Allen pipe plug. New old stock or used and in excellent condition. Discontinued Kohler part #'s 25 029 03, 52 029 13, 52 029 15-S, 52 181 03, 82 755 23-S. $100.00 per kit, plus shipping & handling. (When available.) [Return To Previous Section]


Each oil filter listed below provides superior filtration for less internal engine wear, and fits virtually all OHV single cylinder and V-twin Briggs & Stratton, Kawasaki, Kohler, and opposed twin cylinder Kohler engines. Including Kohler engine models CH11, CH12.5, CH13, CH14, CH15, CH15, CH16, CH18, CH20, CH22, CH25, CH620, CH621, CH640, CH641, CH670, CH680, CH682, CH730, CH732, CH735, CH740, CH742, CH745, CH750, CH752, CH940, CH960, CH980, CH1000, CV1000, CV12.5, CV13, CV14, CV15, CV16, CV18, CV20, CV22, CV25, CV620, CV640, CV670, CV680, CV682, CV730, CV732, CV740, CV742, CV745, CV750, CV752, CV940, CV960, CV980, ECH630, ECH650, ECH680, ECH740, ECH749, ECH985, ECV630, ECV650, ECV680, ECV730, ECV749, ECV850, ECV860, ECV870, ECV880, ECV940, ECV980, EKT740, EKT750, ELH775, EZT715, EZT725, EZT740, EZT750, KT600, KT610, KT620, KT715, KT725, KT730, KT740, KT745, LH685, LH690, LH775, LV680, PCH740, PCV680, PCV740, SV470, SV471, SV480, SV540, SV541, SV590, SV591, SV600, SV601, SV620, SV710, SV720, SV725, SV730, SV735, SV840, TH16, TH18, TH575, KT17 Series II, KT19 Series II, MV16, M18, MV18, M20, MV20, K482, K532, K582 and K662. Has filter listed below has a 7-9 PSI pressure relief valve, and an anti-drain-back valve to minimize dry engine starts. Apply motor oil on rubber seal before installing and tighten securely to prevent oil seepage.

  • General Use Oil Filter. High quality aftermarket. Provides superior filtration for longer engine life. Dimensions: 2-7/8" O.D. x 3" height. $7.00 each, plus shipping & handling.
  • General Use Oil Filter. Dimensions: 2-7/8" O.D. x 2-3/4" height. OEM Kohler part # 12 050 01-S. $10.00 each, plus shipping & handling.
  • Heavy Duty Use Oil Filter. Dimensions: 2-7/8" O.D. x 3-1/2" height. OEM Kohler part # 52 050 02-S. $10.50 each, plus shipping & handling.
  • Extended Use Oil Filter. Dimensions: 3" O.D. x 5-1/8" height. OEM Kohler part # 277233-S. $17.00 each, plus shipping & handling.
Repair Service: Repair stripped aluminum oil pan mounting bolt hole threads. No need to purchase another oil pan! $5.00 each for all parts and labor, plus return shipping & handling.
Cast Aluminum, Narrow Base, Flat Bottom Oil Pan. Fits Kohler K-series and Magnum engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361 with a narrow base block, or if the flanges have been cut off, and the block is converted for use with a narrow base oil pan. Comes with bottom drain, but can be drilled and tapped in thick metal boss for side drain if desired to meet equipment's specification. Clean and in excellent condition, with good bolt thread holes and no cracks. Heli-Coil thread repair inserts installed if necessary. This will fit all IH-built Cub Cadet garden tractors, and John Deere models 110, 112 and early model 210 with the Kohler K241 engines. Model 112 serial number 100,001 – 250,000, 110 serial number 250,001 and up with the Kohler K241 engine, and 210 up to serial number 95,261. These will also fit Wheel Horse garden tractors. Holds 1 quart of oil. Weighs 1.3 lb. Discontinued Kohler part # 237588-S.
  • Used and in excellent condition. $40.00 each, plus shipping & handling. (When available.)
  • Install Heli-Coil Thread Inserts to Repair Stripped Mounting Bolt Holes in YOUR Aluminum Oil Pan. FYI - Heli-Coil thread inserts installed in an aluminum oil pan makes it just as durable as the cast iron oil pan. $40.00 for all 4 bolt holes, plus return shipping & handling.
Cast Iron, Narrow Base, Flat Bottom Oil Pan. Fits Kohler K-series and Magnum engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361 with a narrow base block, or if the flanges have been cut off, and the block is converted for use with a narrow base oil pan. Comes with bottom drain, but can be drilled and tapped in thick metal boss for side drain if desired to meet equipment's specification. Clean and in excellent condition, with good bolt thread holes and no cracks. This is also an exact replacement for John Deere models 110, 112 and early model 210 with the Kohler K241 engines. Model 112 serial number 100,001 – 250,000, 110 serial number 250,001 and up with the Kohler K241 engine, and 210 up to serial number 95,261. These will also fit Wheel Horse garden tractors. Clean and in excellent condition, including good bolt threads. Holds 1 quart of oil. Weighs 4.1 lb. Discontinued Kohler part # 235352.
  • Used and in excellent condition. $60.00 each, plus shipping & handling. (When available.)
Cast Aluminum, Narrow Base, Deep Sump Oil Pans. Fits Kohler K-series and Magnum engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361 with a narrow base block, or if the flanges have been cut off, and the block is converted for use with a narrow base oil pan. Comes with bottom drain only. Clean and in excellent condition, with good bolt thread holes and no cracks. Heli-Coil thread repair inserts installed if necessary. Suitable for general lawn and garden use, snow removal or 4,000 RPM stock competition pulling engines. NOTE: For better lubrication, these oil pans require a full length oil dipper on the connecting rod. Holds 1-1/2 quarts of oil. Weighs 1.85 lb. Discontinued Kohler part # 47 199 09-S.
  • Used and in excellent condition. $60.00 each, plus shipping & handling. (When available.)
  • Install Heli-Coil Thread Inserts to Repair Stripped Mounting Bolt Holes in YOUR Aluminum Oil Pan. FYI - Heli-Coil thread inserts installed in an aluminum oil pan makes it just as durable as the cast iron oil pan. $40.00 for all 4 bolt holes, plus return shipping & handling.
Cast Iron, Narrow Base, Deep Sump Oil Pan. Fits Kohler K-series and Magnum engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361 with a narrow base block, or if the flanges have been cut off, and the block is converted for use with a narrow base oil pan. Comes with bottom drain only. Clean and in excellent condition, with good bolt thread holes and no cracks. Suitable for general yard and garden engines for durability and for stroker competition pulling engines. NOTE: For better lubrication, these oil pans require a full length oil dipper on the connecting rod. Holds 1-1/2 quarts of oil. Weighs 5.4 lb. Discontinued Kohler part # 236328.
  • Used and in excellent condition. $100.00 each or price depends on source and availability, plus shipping & handling. (When available; hard to find nowadays because not many were made.)
Cast Iron,Wide Base, Oil Pan. Fits Kohler K-series and Magnum engine models K241, M10, K301, M12, K321, M14, K341, M16 and K361 with a wide base/flanged block. Comes with side drain, but can be drilled and tapped in bottom for bottom drain if desired to meet equipment's specification. Clean and in excellent condition, with good bolt thread holes and no cracks. These come on various makes of tractors such as: Ariens, Wheel Horse, some Ford, some Jacobsen, Gravely, New Holland, Sears Suburban, Engineering Products Co. (Economy models) and Allis Chalmers. NOTE: For better lubrication, these oil pans require a full length oil dipper on the connecting rod. Holds 2 quarts of oil.
  • Used and in excellent condition. With side drain; most common. OEM Kohler part # 235115-S. $40.00 each, plus shipping & handling. (When available.)
  • Used and in excellent condition. With bottom drain. OEM Kohler part # 235147-S. $40.00 each, plus shipping & handling. (When available.)
  • New. With side drain; most common. OEM Kohler part # 235115-S. $243.00 each, plus shipping & handling.
  • New. With bottom drain. OEM Kohler part # 235147-S. $263.00 each, plus shipping & handling.


Exhaust Gaskets, Complete Header Pipe Kits and Adapters - Click here to contact A-1 Miller's for FREE honest and accurate technical support and/or for ordering information and payment options. Please contact A-1 Miller's if you need a part or parts, or service(s) performed that's not listed or mentioned in this website. [Top of Page]
Exhaust Port Gasket. Fits Kohler engine models K141, K160/K161 and K181 with 1-9/16" bolt hole spacing. OEM Kohler part # 231090-S. $4.35 each, plus shipping & handling.

Exhaust Port Gasket. Fits Kohler engine models K141, K160/K161, K181 and M8 with 1-11/16" bolt hole spacing. OEM Kohler part # 41 041 01-S. $4.95 each, plus shipping & handling.

Exhaust Port Gasket. Fits Kohler engine models K241, M10, K301, M12 and K321, M14. OEM Kohler part # 235122-S. $7.70 each, plus shipping & handling.

Exhaust Port Gasket. Fits Kohler engine model K361. OEM Kohler part # 45 041 12-S. $4.95 each, plus shipping & handling.

NOTE: Exhaust port gaskets for Kohler engine models K90/K91 (part # 220122-S), K341 and M16 (part # 45 041 15-S) are discontinued from Kohler. Use clear RTV silicone adhesive sealant instead. (Silicone sealant is heat-resistant, it will NOT burn out, even with extreme exhaust heat.)

Exhaust Manifold-to-Cylinder Mounting Gaskets. Fits Kohler opposed twin cylinder engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. 1-3/4" offset bolt hole spacing.
  • OEM Kohler part # 52 041 14-S. $6.05 each, plus shipping & handling.
Exhaust Manifold to Block Mounting Gasket. Fits Kohler opposed twin cylinder engine models K482, K532 and K582.
  • OEM Kohler part # 25 041 11-S. $8.01 each, plus shipping & handling.
A-1 Miller's Machine Shop Service -Drill and tap two 5/16-18 UNC threaded holes in exhaust flange on engine block to install custom bolt-on exhaust system or header pipe (listed below). Service is for Kohler engine models K141, K160/K161, K181, M8, K241, M10, K301, M12, K321, M14 or K341, M16. NOTE: For accuracy and precision of holes to be drilled, crankshaft and bearing plate must be removed from engine to fasten block in fabricated fixture on the table of milling machine. An innovative concept by Brian Miller, because nobody else advertise this type of service for a Kohler engine block. $60.00 labor, plus return shipping with FedEx Ground.


A-1 Miller's Machine Shop Service - Remove or drill out broken exhaust bolt(s) and recut 5/16-18 UNC threads for installation of new bolts or studs in exhaust flange on engine block to install custom bolt-on exhaust system or header pipe (listed below). Service is for Kohler engine models K141, K160/K161, K181, M8, K241, M10, K301, M12, K321, M14, K341 or M16. NOTE: If broken bolt(s) needs to be drilled-out, for accuracy and precision of holes to be drilled, crankshaft and bearing plate must be removed from engine to fasten block in fabricated fixture on the table of milling machine. An innovative concept by Brian Miller, because nobody else advertise this type of service for a Kohler engine block. $15.00 - $60.00 labor (depending on difficulty of work involved), plus return shipping with FedEx Ground.


A-1 Miller's Machine Shop Service - Resurface exhaust flange on engine block to ensure 100% sealing of header mounting flange to prevent from loosening due to a heavily rusted, uneven, rough surface. NOTE: For accuracy, crankshaft and bearing plate must be removed from engine to fasten block in fabricated fixture on the table of milling machine. An innovative concept by Brian Miller, because nobody else advertise this type of service for a Kohler engine block. $30.00 labor, plus return shipping with FedEx Ground.

Approximately 5/16" Thickness Steel Header Pipe Flange with two Allen head bolts. Fits Kohler engine models K241, M10, K301, M12, K321, M14. Has a 1-5/16" I.D. hole. NOTE: 5/16-18 UNC threads must be precision-aligned drilled and tapped 1-1/4" deep to fasten flange to block. Use clear RTV silicone adhesive sealant instead of gasket. (Silicone sealant is heat-resistant, it will NOT burn out, even with extreme exhaust heat.)
  • A-1 Miller's fabricated part. $10.00 each, plus return shipping & handling.
Bolt-On Header Pipe Kits. Fits Kohler Engine Models K241, M10, K301, M12, K321 and M14. For competition pulling engines with stock-size or oversize valves running at 4,000 RPM or at open RPM. High grade durable and galvanized-coated mild steel pipe resists rust and will not rust or discolor, even from exhaust heat. Has a 90º, 4" radius bend; each pipe extends 8" from exhaust port to midway of bend for plenty of hood clearance and measures 18" upward from midway of bend. Kit includes 1-5/16" O.D. x 1.260" I.D. x 24" overall length header pipe, 2-1/2" O.D. x 1-5/16" I.D. x 5/16"± thickness round mounting flange and two 5/16-18 UNC Allen head bolts. Flange fastens directly to engine block without a round mounting adapter and clamp, just like automotive engines with headers. No gasket required; use clear RTV silicone adhesive sealant instead. By the way - Silicone is heat-resistant, it will NOT burn out, even with extreme exhaust heat. FYI: When I have my 1-5/16" pipes bent at a local automotive muffler shop, being there is no 1-5/16" I.D. die to fit around the pipe, I use a 1-1/4" I. D. x 1-1/2" O.D. x 12" length steel tube, split in two, with one half cut in two, then I place them inside the 1-1/2" die. And sometimes while the pipe bends, this creates slight crinkles on the sides of the elbow, which will not interfere with the exhaust flow whatsoever. Click photos to the right for a larger view.
  • 1-5/16" O.D. Header Pipe Only. (Customer supplies own flange.) $15.00 each, plus shipping & handling.
  • Complete 1-5/16" O.D. Header Kit with Pipe Not Welded to Flange. (Customer welds pipe to flange.) $25.00 per kit, plus shipping & handling.
  • Complete 1-5/16" O.D. Header Kit with Pipe Professionally Welded to Flange. $35.00 per kit, plus shipping & handling.


Bolt-On Header Pipe Kits for Kohler Engine Models K341 and M16. For competition pulling engines with stock-size or oversize valves running at 4,000 RPM or at open RPM. High grade durable and galvanized-coated mild steel pipe resists rust and will not rust or discolor, even from exhaust heat. Has a 90º, 4" radius bend; each pipe extends 8" from exhaust port to midway of bend for plenty of hood clearance and measures 18" upward from midway of bend. Kit includes 1-1/2" O.D. x 1-3/8" I.D. x 30" overall length header pipe, 2-3/4" O.D. x 1-1/2" I.D. x 3/16"± thickness round mounting flange and two 5/16-18 UNC grade 8 hex head bolts. 1" length of pipe inserts inside exhaust port covering internal NPT threads for unrestricted airflow. Flange fastens directly to engine block without a round mounting adapter and clamp, just like automotive engines with headers. No gasket required; use clear RTV silicone adhesive sealant instead. (Silicone is heat-resistant, it will NOT burn out, even with extreme heat.)

  • 1-1/2" O.D. Header Pipe Only. (Customer supplies own flange.) $15.00 each, plus shipping & handling.
  • Complete 1-1/2" O.D. Header Kit with Pipe Not Welded to Flange. (Customer welds pipe to flange.) $25.00 per kit, plus shipping & handling.
  • Complete 1-1/2" O.D. Header Kit with Pipe Professionally Welded to Flange. $35.00 per kit, plus shipping & handling. shipping & handling.


Machine Shop Services. (Prices listed below are with the engine out of the tractor and on my work table.) [Top of Page]
Engine Block -
  • Clean and degrease block. $7.00 labor, plus return shipping with FedEx Ground.
  • Deglaze cylinder wall (create cross-hatch) and clean block. $20.00 labor per cylinder, plus return shipping with FedEx Ground.
  • Hone cylinder bore to next oversize to fit OEM-type piston (OEM engine block). $75.00 labor per cylinder, plus return shipping with FedEx Ground.
  • Bore and hone cylinder in new Kohler-replicated aftermarket block to fit aftermarket piston. $120.00 labor, plus return shipping with FedEx Ground.
  • Clearance bottom cylinder wall for stroker crankshaft. $75.00 labor, plus return shipping with FedEx Ground.
  • Bore cam pin holes to 11/16" (.6875") for installation of needle bearings (OEM or Kohler-replicated aftermarket block). $50.00 labor, plus return shipping with FedEx Ground.
  • Remove welch plug and cut threads for auxiliary crankcase breather (OEM and Kohler-replicated aftermarket block. $20.00 labor, plus return shipping with FedEx Ground.
  • Drill 7/8" center hole and two outer 1/4" bolt holes in 10-16hp Kohler blocks for installation of mechanical fuel pump. $50.00 labor, plus return shipping with FedEx Ground.


Convert 10-16hp Kohler wide base block to narrow base, for use in a garden tractor requiring a narrow base engine block. (Cub Cadet, Ford, John Deere, Wheel Horse, etc.) See photos shown below Ê An innovative concept by Brian Miller, because nobody else advertise this type of service for a Kohler engine block.

  • Cut off flanges even with sides of block. $40.00 labor, plus return shipping with FedEx Ground.
  • Cut off flanges even with sides of block and cut new threads in oil pan mounting holes. $60.00 labor, plus return shipping with FedEx Ground.
  • Cut off flanges even with sides of block, weld-in steel stock to fill-in oil fill/level check openings (notches), and cut new threads in oil pan mounting holes. $100.00 labor, plus return shipping with FedEx Ground.

Kohler Wide Base Block Converted to a Narrow Base Block

A-1 Miller's Professional Repair Service - Perform Valve Job Only on opposed twin cylinder Kohler KT-series and Magnum engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. This service is for an engine that does not blow blue smoke out the exhaust and burn oil. Performing a professional valve job restores full compression, which allows the engine to start quicker, idle smoothly, rev up with no hesitation, produce lots of power, and run for a long time without stalling or dying (when the ignition timing and carburetor adjustments are set correctly, too). Labor includes: regrind four valve faces and seats, lap in valves with valve lapping compound, reset valve clearances to factory specifications (on short block only), resurface both cylinder heads on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness, reinstall intake manifold and governor linkage. And being some valve guides wear beyond specifications, there will be an extra charge for installing and reaming new guides, if needed. The baffle shields (sheet metal), muffler, intake manifold and governor linkage will need to be removed before bringing or shipping engine/short block to A-1 Miller's (old) shop. To save on shipping cost, only the cylinders (removed from the crankcase) and valves can be shipped in two 12-1/4" x 12-1/4" x 6" USPS Large Flat Rate Boxes. Place one box inside the other to double the strength, and use rigid packing material under, over and around/between the parts to prevent any of the fins from breaking off during shipment. But the short block must be shipped in a sturdy wooden crate. Prices listed below with your cylinder heads/jugs or engine on my work table. Please contact A-1 Miller's if you're interested in having a professional valve job performed on your KT17, KT17 Series II, KT19, KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20 cylinder heads/jugs or engine.
  • Perform Professional Valve Job on 2 Cylinders Only. (Customer resets valve clearances.) $70.00 labor, plus return shipping & handling.
  • Perform Professional Valve Job and Reset Valve Clearances on Short Block (baffle shields (sheet metal), intake manifold and governor linkage removed). $200.00 labor, plus return shipping with FedEx Ground.
  • If needed, install thin-wall bronze sleeves/liners in worn OEM valve guides. $20.00 each, plus return shipping. FYI - Bronze valve guide sleeves/liners are a lower cost alternative to replacing the entire guide in Kohler engines. Bronze also last longer than Kohler's cast iron guides because bronze retains more oil for better lubrication of the valve stem.


Perform Factory Valve Job with Stock Size Valves in Single Cylinder OEM [Kohler] Engine Block - Regrind both valve faces and seats to factory specs, lap in valves, reset valve clearances, and reinstall valves on a single cylinder Kohler engine. $50.00 labor, plus return shipping & handling.

Perform High Performance Valve Job with Stock Size Valves in Single Cylinder OEM [Kohler] Engine Block - Grind intake valve face and seat to 30º/31º and regrind exhaust valve face and seat to 45º/46º, undercut both valve heads for maximum airflow, lap in valves, reset valve clearances, and reinstall valves on a single cylinder Kohler engine. $75.00 labor, plus return shipping & handling.

Install Oversize Intake and Exhaust Valves in Single Cylinder OEM [Kohler] Engine Block: $250.00 - $300.00 (depending on size of valves and if offset guide is required for intake valve) labor, plus return shipping. Oversize valves extra charge.

Enlarge and Polish Intake and Exhaust Port Runners in Single Cylinder OEM [Kohler] Engine Block -

  • Single cylinder OEM Kohler or aftermarket [Kohler] block with large ports: $75.00 labor, plus return shipping.
  • Single cylinder aftermarket [Kohler] block with small ports: $200.00 labor, plus return shipping .

"Round Up" Crankshaft Rod Journal(s) and Resize Connecting Rod(s) - This service is for most makes and models of small engines when an undersize connecting rod or bearing inserts isn't available, if the crankshaft is worn beyond .010" and needs to be reground again, the journal can be reground to wherever it "cleans up" or is true again, then the connecting rod can be resized so it'll fit the smaller undersize journal with the factory recommended .0025" oil clearance. To resize the rod so it'll fit to a few thousands of an inch smaller diameter crank journal, first, metal is removed from the mating end of the rod cap, then the cap is fasten to the rod. The big hole in the rod is now oblong or "egg shaped." Then the big hole in the rod is honed until it's .002" larger than the diameter of the crank journal. Honing reshapes the hole into a perfect circle again, only smaller in diameter. This works very well and it lasts as long as an ordinary STD size rod and crank journal. This can only be performed on a rod with a good bearing surface. It cannot be done on a burnt or heavily scored connecting rod because too much metal would need to be removed. If you're interested, we will need your crankshaft and connecting rod(s). NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shape, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. NOTE: Once installed and in operation, there is no warranty or guarantee of any kind on crankshaft regrinds. An innovative concept by Brian Miller, because nobody else advertise this service.


Crankshaft Regrinding - This service includes Briggs & Stratton, Kohler, Tecumseh, etc.

  • Regrind rod journal (crank pin) to next undersize on single cylinder engine crankshaft: $75.00 each, plus return shipping & handling.
  • Regrind rod journals (crank pins) to next undersize on two cylinder engine crankshaft: $150.00 each, plus return shipping & handling.
  • NOTE: Kohler K241-K361 crankshafts can be reground to .030" undersize and still be safe to use with the connecting rod bored for installation of matching undersized replaceable bearing inserts. And all crankshafts, rather if they're automotive or small engine, are checked for straightness before grinding. If they're bent or twisted, sometimes they can be straightened. We also offer offset crankshaft grinding to increase the length of the stroke at no extra charge. NOTE: Once installed and in operation, there is no warranty or guarantee of any kind on crankshaft regrinds. [Return To Previous Paragraph, Section or Website]


Repair damaged or broken off threaded stud on flywheel end of crankshaft with installation of 3/8" or 7/16" grade 8 UNF bolt. $50.00 each, plus return shipping & handling.

Repair damaged or broken off threaded stud on flywheel end of crankshaft with installation of hardened 7/16" or 5/8" UNF stud. Resembles original stud on end of crankshaft. $75.00 each, plus return shipping & handling.

Center drill and cut threads in PTO end of crankshaft for installation of 3/8" UNF grade 8 bolt. $50.00 each, plus return shipping & handling.

Solid Metal Motor Mount Kit for Cub Cadet "Quiet Line" Garden Tractors. An original, ingenious, innovative concept invention by Brian Miller, because I was the one who originally thought of, promoted and advertised the use of this product. Please accept no copycat products of this kind. (But I do appreciate them acknowledging my ingenuity and intelligence.) [Return to previous section] [Top of Page]

Details include:

  • Replace OEM rubber ISO-mounts with a set of solid metal motor mounts to prevent repeated and costly damage to the clutch components!
  • These custom-made solid motor mounts replaces deteriorated OEM "ISO" rubber engine mounts, which is usually associated with a damaged "flexible" 3-pin clutch drive plate and damaged clutch components. They are also a must for competition pulling! Fits IH Cub Cadet "Quiet Line" garden tractor models 482, 800, 1000, 1100, 1200, 1204, 1210, 1211, 1250, 1282, 1340, 1450 and 1650. If the engine in your tractor is mounted on angled cradles with rubber mounts between the cradles and tractor frame, then these are what your tractor need.
  • Direct replacement for OEM ISO-rubber mounts with no modifications to the tractor whatsoever. A thick flat washer fastens on top of the cradles with the solid mounts sandwiched between the cradles and tractor frame. Torque the bolts at 35 ft. lb. Can be easily removed if rubber mounts are desired instead.
  • For general lawn and garden use, heavy towing, pushing snow or competition pulling. A MUST for competition pulling (or even everyday use) because these stabilize the engine and entire clutch assembly to prevent severe engine vibration at high RPM or at wide open throttle, which can destroy the flexible 3-pin clutch drive plate, clutch disc and driveshaft components. These solid motor mounts weigh about 1 lb.
  • Precision machined by A-1 Miller's so they set the engine crankshaft height at the correct alignment with the driveshaft.
  • FYI - Rubber motor mounts are intended for operator comfort due to engine vibration only. The rubber ISO-mounted engine tractors with solid motor mounts installed would feel and operate just like the tractors with a solid-mounted engine. Some people who installed these solid mounts use their tractor just to mow grass tell A-1 Miller's that the solid mounts don't cause their tractor to vibrate much at all, while others who have installed them said the vibration is unbearable. If the entire tractor vibrates severely after these solid mounts are installed, then the rotating assembly in the engine (crankshaft/connecting rod/piston assembly) and/or flywheel is obviously severely out of balance and needs to be precision spin-balanced by an automotive/race engine machine shop. Because the old Kohlers was balanced during the 1960's-70's with old fashioned and out-dated technology, which is not as precision with today's computerized balancing technology. (The IH Cub Cadet engineers obviously knew the older Kohler engines were out of balance and would vibrate, this is the only reason they installed rubber motor mounts in their "Quiet Line" tractors.) So if you want, to minimize the vibration, either install a set of new OEM Cub Cadet ISO rubber mounts or have the rotating engine parts (crankshaft/piston/connecting rod and flywheel) dynamically and precision spin-balanced with up-to-date technology for a smoother running engine. Or you can return these solid mounts for a full refund, less shipping & handling. And by the way - the two factory-welded reinforcement bars between the cradles is used only on Cub Cadet garden tractor models 1204, 1210, 1211, 1282 and 1340 to prevent the mounting bolt holes in the aluminum oil pan from being stripped out. They are not required with a cast iron oil pan or with solid motor mounts. When in doubt, Heli-Coil stainless steel thread inserts can be installed in an aluminum oil pan to prevent the threads from being stripped out.
  • Solid Motor Mount Kit. Includes four solid mounts, four thick flat washers and four grade 8 bolts/nuts/lock washers. $40.00 per set, plus shipping & handling. Click here to contact A-1 Miller's Performance Enterprises to place an order, send your parts for repairing, and/or for FREE professional and honest technical customer service assistance and support and payment options. Please contact A-1 Miller's if you need a part or parts, or service(s) performed that's not listed or mentioned in this website. | [Top of Page] [Return to Previous Section, Paragraph or Website]
Cub Cadet "Quiet Line" Garden Tractor Engine Mounting Rubber Snubbers/Bumpers and Rubber ISO-Mounts. Fits Cub Cadet AQS "Quiet Line" garden tractor models 482, 800, 1000, 1100, 1200, 1204, 1210, 1211, 1250, 1282, 1340, 1450 and 1650. All these models have a rubber ISO-mounted engine to reduce overall tractor vibration for operator comfort. The rubber ISO-mounts can be adapted for use on various other makes and models of small engine equipment to reduce engine vibration throughout the frame. [Return to Previous Section, Paragraph or Website]
  • Rubber Snubber/Bumper with Threaded Stud. Provides stabilization of the engine and proper alignment of the driveshaft from tension of the drive belt to the mower deck. OEM Cub Cadet part # IH-61510-C1. $21.75 each, plus shipping & handling.
  • Rubber ISO-mount kit. This kit replaces the mount only on one corner. Order four kits for a complete set. OEM Cub Cadet part # 759-3952. $33.60 per kit, plus shipping & handling.
  • Complete Rubber ISO-mount set. This kit replaces the mount only on one corner. Order four kits for a complete set. OEM Cub Cadet part # 759-3952 (x4). $134.40 per set of 4 kits, plus shipping & handling.


NEW LOWER PRICES! Small Engine Repairs, Rebuilds and Custom Engine Build-up Services for General Lawn & Garden Equipment, Go-Karts, King Midget, Older All Terrain Vehicles, Older Snowmobiles, Antique/Vintage, Industrial/Commercial, 2, 3 and 4 Cylinder Lawn & Garden Diesel Engines, etc. | Engines are rebuilt, built for extra power, built to the max, or custom built according to OEM specifications or to your preference. | Click here to contact A-1 Miller's for FREE honest and accurate technical support and/or for ordering information and payment options. Please contact A-1 Miller's if you need a part or parts, or service(s) performed that's not listed or mentioned in this website. Prices are subject to change without notice. [Top of Page]
Information Concerning A-1 Miller's Professional Engine Rebuilding, Build-Ups and Building Services -

Small engine technology has changed a lot since the Kohler K-series and Magnum engines were made. A-1 Miller's highly trained and skilled technicians can rebuild your ordinary lawn and garden engine or competition pulling engine with new technological parts so it'll produce more power and last longer than the factory anticipated. A-1 Miller's also build engines from scratch and rebuild customer's complete engines anywhere from OEM factory stock, to 4,000± RPM governed, to open RPM Hot-Stock, Stock-Altered, Missouri Super Stock, V-twin and 50 ci Modified competition pulling engines. We can build a quality, competition engine for you, or rebuild your engine however you want. Just tell A-1 Miller's know how you're going to use your tractor or equipment and your engine will be built to suit your needs. And if it's required in your association/club sanctioning engine rules or not, ALWAYS install a safety shield made of adequate thickness and material for each side of the engine fastened to the tractor frame securely in case of connecting rod failure (Murphy's Law), so an innocent bystander or spectator won't be injured or killed from high-speed projected metal shrapnel.

We don't have any rebuilt Kohler short blocks or engines in stock. And if we did, chances are, they probably wouldn't be designed for your garden tractor, small motorized vehicle or equipment. Because Kohler engines are made specifically to fit a certain model of garden tractor, small motorized vehicle or equipment. They are not a "universal fit" or "one fits all". Therefore, it'll be best to have your engines rebuilt instead. Then all the brackets, accessories and electrical wiring will reconnect to your garden tractor, small motorized vehicle or equipment with no modifications.

Also, we set the air/fuel adjusters on all carburetors just so the engine will start and run, but because of the altitude level, barometric pressure and air temperature where the engine will be used, the customer will need to make the final bore.) OEM so the engine will run smooth. No carburetor with an adjustable high speed main fuel adjuster comes preset, not even new ones.

Furthermore, just to let you know, although we use the best parts, use caution on choosing the right motor oil to use in your engine. Because the government (Sierra club/tree huggers) is requiring oil companies to lessen the amount of zinc in their motor oils to reduce pollution. Zinc provides a thin protective coating on internal engine parts and prevents metal to metal contact for proper break-in and it helps the parts last longer throughout the life of the engine. Many auto manufacturers and professional engine rebuilders are upset because of this too, because they have to guarantee their engines for a certain period of time, and many of them take pride in building their engines.

Regarding an Engine Rebuild, Build-Up or Build from Scratch Estimate -

We're very meticulous in how we rebuild, build-up and build from scratch our customer's engines. We pay close attention to the small details for wear and tear on every part of an engine and replace or repair where necessary so the engine will produce more power than before and last a long time. If you would like to have A-1 Miller's rebuild, build-up your engine or build an engine from scratch for you, we will need a detailed list of exactly what you want done to your engine or a copy of your association/club sanctioning engine rules and requirements regarding the engine requirements before we can give you an estimate on the cost. And if you (the customer), change your mind of how you want the engine rebuilt, built up or custom built in the middle of a build, we will need to know ahead of time and we will need the changes in writing so we can make the necessary changes to the engine. Otherwise, this will effect how well the engine performs on the track, and it would make us, as professional engine builders, look bad. Having confidence in an engine makes you feel good, but having confidence in your engine builder makes you feel better.

A-1 Miller's competition pulling engines will be coated with high quality gloss black paint (most common factory color), International Cub Cadet yellow paint, Wheel Horse red paint or the color of your choice. When you receive your engine, install the baffle shields (sheet metal), brackets and everything else on the engine, install the engine in the tractor, add motor oil to the proper level, install the fuel hose, add fuel, connect the ignition and starter wires, connect the throttle/choke cable controls, and the engine will be ready to start. Carburetor adjustments will be initially preset just so the engine will start and run, but due to the altitude level, barometric pressure and air temperature where the engine will be used, the final idle speed, idle air/fuel mixture and high speed air/fuel mixture adjustments will need to be made by the customer after the engine is started and warmed up to operating temperature.

Whenever we rebuild or build-up an engine, and if you would like to do so, we do whatever it takes so it'll produce the factory-rated horsepower or the maximum horsepower and torque, and last a long time. we go beyond what the repair manual says to do. we can get all the parts needed, too. we can build your engine so it'll be legal for the class you plan to pull in. And with my engine rebuilds and build-ups, you may not always win, but you'll look good trying! By the way - the surface of the exhaust area of a fresh-built engine may burn off the oil residue for a short time once it gets hot, but it'll stop after a while. It's nothing to worry about. This happens with most rebuilt engines, especially an engine with fresh paint.

We build all competition pulling engines in accordance with your association's/club's sanctioning engine rules and requirements, or to your personal preference. Being different pulling associations/clubs have different engine rules and requirements, there is no "one pulling engine that conforms to each and every club's rules and requirements." We'll build your engine or an engine for you so it'll produce the maximum horsepower and torque, and not less than what your association's/club's rules and requirements allow.

We also rebuild ordinary/stock lawn and garden equipment engines too, such as cast iron and cast aluminum block single- and twin-cylinder flathead, OHV and V-twin Briggs & Stratton, Kohler, Tecumseh and 2-cycle LawnBoy. I've never encountered an engine that we couldn't repair, rebuild or build-up/modify with more horsepower and torque!

FYI - Being I'm the only person to read and respond to all my customer's emails (about 20 or so per day), take my customer's phone call orders (about 20-30 on a nice day with good weather), with customers stopping by my shop, repair and rebuild my customer's parts and engines in my shop, locate hard-to-find engine parts, order parts from my suppliers, process orders, package parts then mail customer's parts at my local Post Office, etc., it may take A-1 Miller's several months to rebuild an engine. It also takes time to perform precision machine work and manual workmanship on an engine rebuild, especially for a competition pulling engine, and we wouldn't want to do a rush job. we also have to depend on other local machine shops to perform various machine work and balance rotating engine parts. All this takes time. we tried hiring different people to help me in my shop, but it seems a lot of people don't fully understand about most of the parts and services that we offer. We never fired anyone. They all quit on me. So please keep this in mind if you decide to have A-1 Miller's rebuild/build up your engine. Also, we don't like to rush on my customer's repair jobs. I'm very particular about my work, especially my engine builds. We like to take my time to make sure that everything is right, the engine will run right, produce full power and last a long time. We appreciate for you understanding my situation. - Brian Miller

FYI - Used OEM parts in good condition for older Kohler engines are hard to find now, especially the small parts. If the parts don't wear, they tend to get thrown away and then "engine scrappers" sell the parts that do wear on places like eBay. They don't think about people like me, who make a living by "piecing together" or building engines from scratch for a customer. We can purchase new parts from Kohler if they're still available, but that would be cost-prohibitive. We try to keep my engine builds at reasonable prices. - Brian Miller

All of A-1 Miller's customer's competition pulling engine builds are strictly confidential! This means the people you pull against will not know what goes into your engine.

Below Ê are details and prices to rebuild your engine -
Professional Repair or Rebuild Service for Briggs & Stratton 16, 18 and 20hp opposed twin cylinder aluminum block engine (horizontal or vertical shaft) to OEM factory specifications at governed 3,600 RPM for general lawn and garden use, snow removal or mild competition pulling. Only high quality machine work is performed and replacement parts are installed! All baffle shields (sheet metal) will need to be removed before bringing or shipping engine to A-1 Miller's. When shipping an engine, it must be securely fastened inside a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines. NOTE: If your engine doesn't smoke out the exhaust and burn oil, then chances are, all it needs is a professional valve job performed. Then the engine should start quicker, idle smoothly, rev up with no hesitation, produce lots of power, and run for a long time without stalling or dying (when the ignition timing and carburetor adjustments are set correctly, too). We can do this instead of rebuilding your engine. The price is $300.00 for all parts and labor to perform the valve job, plus return shipping.
  • Professionally Rebuild YOUR engine: $500 - $700± for all parts and labor. Total price depends on engine model, amount of wear, if any internal damage, and which parts need to be machined and/or replaced. Plus return shipping with FedEx Ground. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Basic Parts and Labor Include: Completely disassemble engine, thoroughly degrease, clean and inspect block and all parts for wear and/or damage; set ring end gaps to factory specs; install new STD size pistons/rings assemblies or bore cylinders (if needed) and install new oversize pistons/rings assemblies; regrind valves and seats; regrind crank journals and resize connecting rods with .0025" oil clearance, or install new matching undersize rods (if needed); resurface cylinder heads to remove any warpage and restore flatness; rebuild carburetor with a new overhaul kit; install new tune-up kit; install new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be higher for additional parts and labor (if rebuildable).


Professional Repair or Rebuild Service for Briggs & Stratton Vanguard V-twin aluminum block engine (horizontal or vertical shaft) to OEM factory specifications at governed 3,600 RPM for general lawn and garden use, snow removal or mild competition pulling. Only high quality machine work is performed and replacement parts are installed! All baffle shields (sheet metal) will need to be removed before bringing or shipping engine to A-1 Miller's. When shipping an engine, it must be securely fastened inside a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Rebuild YOUR engine: $600 - $800± for all parts and labor. Total price depends on engine model, amount of wear, if any internal damage, and which parts need to be machined and/or replaced. Plus return shipping with FedEx Ground. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Basic Parts and Labor Include: Completely disassemble engine, thoroughly degrease, clean and inspect the block and all parts for wear and/or damage; set ring end gaps to factory specs; install new STD size pistons/rings assemblies or bore cylinders (if needed) and install new oversize pistons/rings assemblies; regrind valves and seats; regrind crank journals and resize connecting rods with .0025" oil clearance, or install new matching undersize rods (if needed); resurface cylinder heads to remove any warpage and restore flatness, rebuild carburetor with a new overhaul kit, install tune-up kit, install new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be higher for additional parts and labor (if rebuildable).


Professional Repair or Rebuild Service for Kohler engine models K90/K91 cast iron block flathead engine to OEM factory specifications at 4,000± governed RPM (for general lawn and garden use). Only high quality machine work is performed and replacement parts are installed! All baffle shields (sheet metal) will need to be removed before bringing or shipping engine to A-1 Miller's. When shipping an engine, it must be securely fastened inside a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Rebuild YOUR engine: $400 - $600± for all parts and labor. Total price depends on the amount of wear, if any internal damage, and which parts need to be machined and/or replaced. Plus return shipping with FedEx Ground. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . Price depends on extent of wear and availability of rebuild parts. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Basic Parts and Labor Include: Completely disassemble engine, thoroughly degrease, clean and inspect the block and all parts for wear and/or damage; set ring end gaps to factory specs; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (if needed); regrind valves and seats; regrind crank journal and resize connecting rod with .0025" oil clearance, or install new matching undersize rod, resurface cylinder head to remove any warpage and restore flatness, rebuild carburetor with a new overhaul kit, install tune-up kit, install new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be higher for additional parts and labor (if rebuildable). Extra charge for installing A-1 Miller's custom-made electronic ignition. Price depends on type of electronic ignition system installed.


Professional Repair or Rebuild Service for Kohler K-series engine models K141, K160/K161, K181 and Magnum M8 cast iron block flathead engine to OEM factory specifications at governed 3,600 RPM for general lawn and garden use, snow removal or mild competition pulling. Only high quality machine work is performed and replacement parts are installed! All baffle shields (sheet metal) will need to be removed before bringing or shipping engine to A-1 Miller's. When shipping an engine, it must be securely fastened inside a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Rebuild YOUR engine: K141, K160/K161, K181 or M8 w/2-7/8" or w/2-15/16" cylinder bore: $600 - $800± for all parts and labor. Total price depends on engine model, amount of wear, if any internal damage, and which parts need to be machined and/or replaced. Plus return shipping with FedEx Ground. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Basic Parts and Labor Include: Completely disassemble engine; thoroughly degrease, clean and inspect the block and all parts for wear and/or damage; set ring end gaps to factory specs; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (if needed); install rotator on the exhaust valve so any carbon deposits will be wiped away from valve face and seat to prevent valve burning (if needed); regrind crank journal and resize connecting rod with .0025" oil clearance, or install new matching undersize rod; resurface cylinder head to remove any warpage and restore flatness; rebuild carburetor with a new overhaul kit; install tune-up kit; install rubber seal in governor shaft bushing to prevent oil seepage; install new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be higher for additional parts and labor (if rebuildable). Extra charge for installing A-1 Miller's custom-made electronic ignition. Price depends on type of flywheel required and type of electronic ignition system installed (except Magnum engines).


Professional Rebuild or Build-Up Services for Kohler K-series or AQS "Quiet Line" engine models K241, K301, K321, K341, and Magnum models M10, M12, M14 and M16 listed below. Only high quality machine work is performed and replacement parts are installed! All baffle shields (sheet metal) will need to be removed before bringing or shipping engine to A-1 Miller's. When shipping an engine, it must be securely fastened inside a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Rebuild YOUR engine to OEM factory specifications up to governed 3,600 RPM for general lawn and garden use:
    • K241 or M10 - $600 - $800
    • K301 or M12 engine - $800 - $1,000
    • K321 or M14 engine - $1,000 - $1,200
    • K341 or M16 engine - $1,200 - $1,400
  • Prices above includes all parts and labor. Total rebuild price depends on engine model, amount of wear, if any internal damage, and which parts need to be machined and/or replaced. Plus return shipping with FedEx Ground. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Basic Parts and Labor Include: Completely disassemble engine; thoroughly degrease, clean and inspect the block and all parts for wear and/or damage; set ring end gaps to factory specs; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (if needed); install rotator on the exhaust valve so any carbon deposits will be wiped away from valve face and seat to prevent valve burning; regrind crank journal and resize connecting rod with .0025" oil clearance, or install new matching undersize rod, or bore rod and install bearing inserts (if needed) (if needed); resurface cylinder head to remove any warpage and restore flatness; rebuild carburetor with a new overhaul kit; install tune-up kit; install rubber seal in governor shaft bushing to prevent oil seepage; install new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be higher for additional parts and labor (if rebuildable). Extra charge for installing A-1 Miller's custom-made electronic ignition. Price depends on type of flywheel required and type of electronic ignition system installed (except Magnum engines).
  • Rebuild YOUR engine for noticeably more power or build to the max up to 4,000± RPM for heavy lawn and garden use or mild competition pulling: $1,200 - $1,500± for all parts and labor. Total price depends on engine model, amount of wear, if any internal damage, and which parts need to be machined and/or replaced. Plus return shipping with FedEx Ground. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Basic Parts and Labor Include: Completely disassemble engine, thoroughly degrease, clean and inspect the block and all parts for wear and/or damage; set ring end gaps to factory specs; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (if needed); install rotator on the exhaust valve so any carbon deposits will be wiped away from valve face and seat to prevent valve burning (if needed); regrind crank journal and resize connecting rod with .0025" oil clearance, or install new matching undersize rod, or bore rod and install bearing inserts (if needed); resurface cylinder head to remove any warpage and restore flatness, rebuild carburetor with a new overhaul kit, install new tune-up kit; install rubber seal in governor shaft bushing to prevent oil seepage; install new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be higher for additional parts and labor (if rebuildable). Extra charge for installing A-1 Miller's custom-made electronic ignition. Price depends on type of flywheel required and type of electronic ignition system installed (except Magnum engines).


For Sale: Rebuilt or Custom-Built Kohler Lawn & Garden or Small Engine Equipment Engines - [Top of Page]

Kohler K-series or Kohler AQS "Quiet Line" engine models K241, K301, K321, K341, and Magnum models M10, M12, M14 and M16. Only high quality machine work is performed and replacement parts are installed! Depending on application, flywheel, starter, baffle shields (sheet metal), etc., may or may not be included with engine (short block). When purchasing an engine, you can come to pick it up at A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203, or have it shipped to your address in a sturdy, wooden crate. Price of engine: $1,000 - $1,600±, depending on engine model and specification number (application), and make and model of garden tractor or equipment. Constructing crate and FedEx Ground shipping is extra charge. Trade-ins accepted. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines. Extra charge for installing A-1 Miller's custom-made electronic ignition. Price depends on type of flywheel required and type of electronic ignition system installed (except Magnum engines).


Professional Rebuild Service for Kohler engine model K361 OHV for general lawn and garden use, snow removal or mild competition pulling. Only high quality machine work is performed and replacement parts are installed! All baffle shields (sheet metal) will need to be removed before bringing or shipping engine to A-1 Miller's. When shipping an engine, it must be securely fastened inside a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Rebuild YOUR engine: $1,000-$1,300± for all parts and labor. Total price depends on the amount of wear, if any internal damage, and which parts need to be machined and/or replaced. Plus return shipping with FedEx Ground. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . Price depends on extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Basic Parts and Labor Include: Completely disassemble engine, thoroughly degrease, clean and inspect the block and all parts for wear and/or damage; set ring end gaps to factory specs; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (if needed); install rotator on the exhaust valve so any carbon deposits will be wiped away from valve face and seat to prevent valve burning (if needed); regrind crank journal and resize connecting rod with .0025" oil clearance, or install new matching undersize rod, or bore rod and install bearing inserts (if needed); resurface cylinder head to remove any warpage and restore flatness, rebuild carburetor with a new overhaul kit, install new tune-up kit; install rubber seal in governor shaft bushing to prevent oil seepage; install new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be higher for additional parts and labor (if rebuildable). Extra charge for installing A-1 Miller's custom-made electronic ignition. Price depends on type of flywheel required and type of electronic ignition system installed.

A-1 Miller's Professional Valve Seat Repair Service for Kohler Engine Model K361 Cylinder Head. [Top of Page] This service is for an engine that does not blow blue smoke out the exhaust and burn oil. Performing a professional valve job restores full compression, which allows the engine to start quicker, idle smoothly without stalling, and (if the ignition timing and carburetor adjustments are set correctly, too), it will produce full power at top governed speed. Click or tap here for cylinder head bolt torque specs. And if you've ever wondered how the K361 rocker arms receive plenty of oil to keep them lubricated, when the engine is running at full governed speed, internal air pressure from the downward stroke of the piston forces crankcase oil through the pushrod tubes onto the rocker arms. A proven, ingenious and innovative concept by Brian Miller. Please do not accept advertised copycat products of this kind. (But I do appreciate them acknowledging my ingenuity and intelligence.)

  • Repair loose valve seat with a new BRONZE valve seat. FYI - A replacement pressed-in steel valve seat will loosen, without a doubt, after a short time in an aluminum cylinder head, even if it's professionally installed. But a replacement pressed-in bronze seat will NOT loosen when professionally installed because the "roughness" of bronze surface grips or adheres to aluminum much better than the "slick" surface of a steel seat. Plus, being bronze is actually harder than cast iron, it will wear very little and hold up to extreme heat, even for the exhaust side. $75.00 each for parts and labor, plus return shipping & handing.
  • Repair worn inside of valve guide with a thin-wall bronze sleeve insert. $20.00 each for parts and labor, plus return shipping & handing.
  • Replace loose guide valve with an oversize O.D. guide. $40.00 each for parts and labor, plus return shipping & handing.
  • Resurface head gasket mating surface to remove any warpage and restore flatness. $20.00 labor, plus return shipping & handing.
  • Perform valve job (regrind both valve faces and seats) to OEM angles, lap-in valves, install new valve stem seal, reinstall valves, springs, rotators and keepers/locks/collets. $45.00 labor, plus return shipping & handling.
  • If necessary after performing valve job, replace both original OEM 1-9/16" length valve springs with OEM Kohler 1-3/4" length springs so engine will produce more power at full governed speed without erratic valve behavior or misfire. $20.00 extra for both springs.
  • Gaskets to Reinstall Rebuilt K361 Cylinder Head on Engine. (Each part listed below included in the full engine gasket set.)
    • Head gasket. High quality aftermarket. Discontinued Kohler part # 45 052 02-S. $24.00 each, plus shipping & handling.
    • Rocker arm housing gasket. High quality aftermarket. Discontinued Kohler part # 45 041 14-S. $15.00 each, plus shipping & handling.
    • Rocker arm cover gasket. OEM Kohler part # 45 041 09-S. $8.00 each, plus shipping & handling.
    • Two pushrod tube neoprene rubber O-rings. (Kohler part # 45 153 01-S. $2.00/two, plus shipping & handling.
    • Intake tube mounting gasket. Kohler part # 271030-S. $1.00 each, plus shipping & handling.

FYI - I have found that the Kohler K361 18hp OHV cylinder head use the longer 1-3/4" valve spring (uncompressed length; discontinued Kohler part # 235010-S) with rotators for both valves, the same spring that certain early K241, K301 and K321 engines use with the stamped retainer. And of course, certain later K241, K301, K321, and all K341 engines have the shorter 1-9/16" spring (uncompressed length; discontinued Kohler part # 235168-S) with the rotator. Anyway, the official Kohler parts manual says that the K361 use the shorter 1-9/16" springs (with rotators) for both valves, but apparently, it's wrong! It obviously requires the longer 1-3/4" springs (with rotators). And of all the K361 engines that I've rebuilt through the years, with the 1-3/4" springs and rotators installed, there is no coil bind. Coil bind is when the coils of the spring make contact with each other at maximum valve lift. I've had a customer send his K361 head to me for repairs, and when I spoke to him on the phone about his engine, he mentioned that the engine had always made a chattering/rattling sound at full governed speed and lacked sufficient power. So I checked the valve springs, and sure enough, it had the shorter 1-9/16" springs (with rotators). My customer was lucky it didn't drop a valve. That would've been a nightmare! So I installed a set of the longer 1-3/4" springs (with rotators). The valves felt stiffer when I pushed down on them with my hand, too. - Brian Miller


Kohler engine model K361 (OHV 18hp) Cylinder Head Assembly. Professionally rebuilt and fully assembled. Includes valves, springs, rotators, stabilizers and keepers. Cleaned and resurfaced on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness. No cracks. Cooling fins, spark plug threads and bolt hole threads are in good condition. Valve seats and/or valve guides reground or replaced, if necessary. NOTE: If it's repairable and reusable, do not discard your cylinder head or other Kohler parts. Most discontinued OEM Kohler parts in good, reusable/rebuildable condition are hard to find nowadays, and nothing works better than the original part(s) the engine is designed for. Each head listed below is used and in excellent condition. Discontinued Kohler part #'s 45 318 04 -S and 45 755 10-S.

  • With rebuildable core trade-in/exchange. $250.00 each, plus shipping & handling. (When available.)
  • Outright with no core trade-in/exchange. $400.00 each, plus shipping & handling. (When available.)
  • Gasket kit to reinstall rebuilt K361 cylinder head on engine. $50.00 each, plus shipping & handling.
  • New head bolts. Fits Kohler engine model K361. 3/8" diameter x 1-1/2" thread length grade 8 bolts and hardened washers. OEM Kohler part #'s 270721-S (bolt; discontinued from Kohler), 270889-S (washer).
    • High quality aftermarket. Set of 6 bolts only. $6.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 6 bolts and 6 washers. $9.00 per set, plus shipping & handling.

Click here to contact A-1 Miller's for FREE honest and accurate technical support and/or for ordering information and payment options. Please contact A-1 Miller's if you need a part or parts, or service(s) performed that's not listed or mentioned in this website. [Top of Page]


Professional Repair or Rebuild Service for Kohler KT-series and Magnum opposed twin cylinder engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, MV16, M18, MV18, M20 and MV20. to OEM factory specifications at up to governed 3,600 RPM for general lawn and garden use, snow removal or mild competition pulling. Only high quality machine work is performed and replacement parts are installed! All baffle shields (sheet metal) will need to be removed before bringing or shipping engine to A-1 Miller's. When shipping an engine, it must be securely fastened inside a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Complete Engine Rebuild. Rebuild YOUR engine: $800-$1,300± for all parts and labor. Total price depends on engine model, amount of wear, if any internal damage, and which parts need to be machined and/or replaced. Plus return shipping with FedEx Ground. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly degrease, clean and inspect block and all parts; set ring end gaps to factory specs; install new STD size pistons/rings assemblies or bore cylinder (if needed) and install new oversize pistons/rings assemblies (price will be higher for the boring and with a new oversize piston and rings); regrind valves and seats, install new valve guides (if needed), resurface cylinder heads (on wide, flat belt- or disc-sander/grinder) to remove any warpage and restore flatness; rebuild carburetor, install new gaskets and oil seals and install new tune-up kit. If engine was run out of oil and have a broken connecting rod or rods, and internal damage has resulted, the price will be higher for additional parts and labor (if rebuildable). If one or both cylinders are scored and needs to be replaced with new piston and rings, the price will be higher. But cylinder scoring is rare. If either cylinder wall and/or piston(s) is/are scored and needs replacing, the price will be higher. For these type of engines, we don't have the cylinders bored oversize and install new oversize piston and rings because this would be too cost prohibitive being we have good used cylinders and pistons in stock. Install an oil filter adapter with a new oil filter too (only if the engine didn't originally come with these parts, and for engines that will accept these parts), to help it last longer between oil changes. But the oil filter adapter kit have been discontinued from Kohler and they're hard to find nowadays. Extra charge for installing A-1 Miller's custom-made electronic ignition (except Magnum engines).
  • A-1 Miller's Professional Repair Service - Perform Valve Job Only on opposed twin cylinder Kohler KT-series and Magnum engine models KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20. This service is for an engine that does not blow blue smoke out the exhaust and burn oil. Performing a professional valve job restores full compression, which allows the engine to start quicker, idle smoothly, rev up with no hesitation, produce lots of power, and run for a long time without stalling or dying (when the ignition timing and carburetor adjustments are set correctly, too). Labor includes: regrind four valve faces and seats, lap in valves with valve lapping compound, reset valve clearances to factory specifications (on short block only), resurface both cylinder heads on a wide, flat belt- or disc-sander/grinder to remove any warpage and restore flatness, reinstall intake manifold and governor linkage. And being some valve guides wear beyond specifications, there will be an extra charge for installing and reaming new guides, if needed. The baffle shields (sheet metal), muffler, intake manifold and governor linkage will need to be removed before bringing or shipping engine/short block to A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203. To save on shipping cost, only the cylinders (removed from the crankcase) and valves can be shipped in two 12-1/4" x 12-1/4" x 6" USPS Large Flat Rate Boxes. Place one box inside the other to double the strength, and use rigid packing material under, over and around/between the parts to prevent any of the fins from breaking off during shipment. But the short block must be shipped in a sturdy wooden crate. Prices listed below with your cylinder heads/jugs or engine on my work table. Please contact A-1 Miller's if you're interested in having a professional valve job performed on your KT17, KT17 Series II, KT19, KT19 Series II, KT21, MV16, M18, MV18, M20 and MV20 cylinder heads/jugs or engine.
    • Perform Professional Valve Job on 2 Cylinders Only. (Customer resets valve clearances.) $70.00 labor, plus return shipping & handling.
    • Perform Professional Valve Job and Reset Valve Clearances on Short Block (baffle shields (sheet metal), intake manifold and governor linkage removed). $200.00 labor, plus return shipping with FedEx Ground.
    • If needed, install thin-wall bronze sleeves/liners in worn OEM valve guides. $20.00 each, plus return shipping. FYI - Bronze valve guide sleeves/liners are a lower cost alternative to replacing the entire guide in Kohler engines. Bronze also last longer than Kohler's cast iron guides because bronze retains more oil for better lubrication of the valve stem.


Professional Repair or Rebuild Service for Kohler engine models K482, K532 and K582 opposed twin cylinder (flathead) engines to OEM factory specifications at up to governed 3,600 RPM for general lawn and garden use, snow removal or mild competition pulling. Only high quality machine work is performed and replacement parts are installed! All baffle shields (sheet metal) will need to be removed before bringing or shipping engine to A-1 Miller's. When shipping an engine, it must be securely fastened inside a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines. NOTE: If your engine doesn't smoke out the exhaust and burn oil, but looses power, then chances are all it needs is a professional tune-up and valve job performed. We can do this instead of rebuilding your engine. The price is $300.00 for all parts and labor to perform the valve job, plus return shipping.

  • Rebuild YOUR engine: $1,300-$1,500± for all parts and labor. Total price depends on engine model, amount of wear, if any internal damage, and which parts need to be machined and/or replaced. Plus return shipping with FedEx Ground. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly degrease, clean and inspect block and all parts; set ring end gaps to factory specs; install new STD size pistons/rings assemblies or bore cylinders (if needed) and install new oversize pistons/rings assemblies (price will be higher for the boring and with a new oversize piston and rings); regrind valves and seats, install new valve guides (if needed), resurface cylinder heads to remove any warpage and restore flatness; rebuild carburetor, install new gaskets and oil seals and install new tune-up kit. If engine was run out of oil and have a broken connecting rod or rods, and internal damage has resulted, the price will be higher for additional parts and labor (if rebuildable). If one or both cylinders are scored and needs to be bored oversize with new oversize piston and rings, the price will be higher. Extra charge for installing A-1 Miller's custom-made electronic ignition.


Professional OEM Repair or Rebuild Service for Kohler Command V-Twin CH18-CH25, CH620-CH730, CH740, CH750, CV17-CV25, CV620-CV730, CV740, CV750, Kohler Command Pro V-Twin CV940, CV960, CV980, CV1000, CH735, CH26, CH745, ECH630-ECH749, including various other Kohler V-Twin models not listed. Only high quality machine work is performed and replacement parts are installed! All baffle shields (sheet metal) will need to be removed before bringing or shipping engine to A-1 Miller's. When shipping an engine, it must be securely fastened inside a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines. FYI: Being V-twin competition pulling engines are rare in my area (mid Missouri), I don't get too many of these in my shop to build-up for more power. Therefore, I haven't had much experience with modifying them. But you can contact Midwest Super Cub at https://mwsc.co/. I'm sure they can help you.

  • Rebuild YOUR engine: $1,000 - $1,500± for all parts and labor. Total price depends on engine model, amount of wear, if any internal damage, and which parts need to be machined and/or replaced. External replacement parts for electronic fuel injection (ECH models) engines extra charge. Plus return shipping with FedEx Ground. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.


Professional OEM Repair or Rebuild Service for Generac V-Twin Engine Models 005682-0, 0E3480, 0E4328, 389cc, 5625-0, GH-220, GH-410, GN-190, GN-220, GN-320, GN-360, GN-410, GT-760, GT-990, GTH-990, GTV-760 and GTV-990. Only high quality machine work is performed and replacement parts are installed! All baffle shields (sheet metal) will need to be removed before bringing or shipping engine to A-1 Miller's. When shipping an engine, it must be securely fastened inside a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Rebuild YOUR engine: $800 - $1,300± for all parts and labor. Total price depends on engine model, amount of wear, if any internal damage, and which parts need to be machined and/or replaced. Plus return shipping with FedEx Ground. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
Professionally Custom Kohler Competition Pulling Engines Build Service | All engines are built according to your pulling association/club sanctioning rules and requirements, or custom built to your preference. [Top of Page]

Garden tractor competition pulling engine technology has changed a lot through the years. A-1 Miller's can rebuild your Kohler pulling engine with new technological parts so it'll produce more power, be more competitive on the track and last longer than anticipated. The engines listed below are high output 10hp (K241), 12hp (K301), 14hp (K321) or 16hp (K341) Kohler engines, built and designed for competition pulling only, not general lawn and garden use.

The "Built to the Max" Stock class engines runs at 4,000± governed RPM; have a 9-1/2" heavy steel ring gear flywheel; upper mount high torque gear starter (mounting bolts are underneath the starter motor); performance valve job with stock size valves; A-1 Miller's reground/torque cam; medium performance valve springs; #26 or #30 Kohler carburetor (depending on engine size) bored-out, reworked and set up for gas; enlarged ports and polished (intake port made larger only if it is smaller in diameter than the carburetor throttle bore); 2nd or 3rd generation cylinder head milled .050"; connecting rod bored .020" offset for piston pop out with bearing inserts installed. Also included are: flywheel shroud (not chrome plated), aluminum or cast iron oil pan, bolt-on header pipe and conventional Kohler point ignition system installed with ignition timing preset.

A-1 Miller's competition pulling engines will be coated with high quality gloss black paint or International Harvester Cub Cadet yellow paint. When you receive your engine, install it in the tractor, add motor oil to the proper level, install the fuel hose, add fuel, connect the ignition and starter wires, connect the throttle cable controls, and the engine will be ready to start. Carburetor adjustments will be initially preset just so the engine will start and run, but due to the altitude level, barometric pressure and air temperature where the engine will be used, the final idle speed, idle air/fuel mixture and high speed air/fuel mixture adjustments will need to be made by the customer after the engine is warmed up to operating temperature. Competition pulling engines will have no charging system. So use a high amperage 12 volt battery and a remote battery charger (with a gauge) to fully recharge the battery (preferably overnight) before each pulling event. And the only complaint we've received from our customer's concerning the pulling engines that we build for them is their tractor broke [factory stock] drivetrain and/or rear end parts.

4,000 RPM "Build to the Max" Stock-Appearing Competition Pulling Engines listed below - built for competition pulling only and to your pulling association/club sanctioning engine rules and requirements. In addition to all the essentials, prices listed below include a 9-1/2" 32 lb. steel flywheel w/ring gear and new high torque (Kohler style) gear starter motor. Extra charge for gear reduction starter w/bracket. Extra charge for installing A-1 Miller's custom-made electronic ignition. Price depends on type of electronic ignition system installed. $100 to construct a sturdy wooden shipping crate with shipping & handling is extra charge. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . Horsepower/torque and price depends on how the engine is built. (Past engines test ran on A-1 Miller's personal dynamometer with accurate results.) IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • 10hp (K241) Kohler 4,000 RPM Build to the Max Competition Pulling Engine. Dyno'd at 15hp± at 4,000 RPM and 19± ft. lbs. of torque at 4,000 RPM.
    • With customer supplying engine block and most parts. $2,400± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
    • With A-1 Miller's supplying engine block and all parts. $3,400± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
  • 12hp (K301) Kohler 4,000 RPM Build to the Max Competition Pulling Engine. Dyno'd at 22hp± at 4,000 RPM and 29± ft. lbs. of torque at 4,000 RPM.
    • With customer supplying engine block and most parts. $2,400± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
    • With A-1 Miller's supplying engine block and all parts. $3,400± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
  • 14hp (K321) Kohler 4,000 RPM Build to the Max Competition Pulling Engine. Dyno'd at 25hp± at 4,000 RPM and 33± ft. lbs. of torque at 4,000 RPM.
    • With customer supplying engine block and most parts. $2,600± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
    • With A-1 Miller's supplying engine block and all parts. $3,600± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
  • 16hp (K341) Kohler 4,000 RPM Build to the Max Competition Pulling Engine. Dyno'd at 28hp± at 4,000 RPM and 37± ft. lbs. of torque at 4,000 RPM.
    • With customer supplying engine block and most parts. $2,800± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
    • With A-1 Miller's supplying engine block and all parts. $3,800± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.

Click here to contact A-1 Miller's for FREE honest and accurate technical support and/or for ordering information and payment options. Please contact A-1 Miller's if you need a part or parts, or service(s) performed that's not listed or mentioned in this website. [Top of Page]


Open RPM (open RPM) Hot Stock or Sport Stock Competition Pulling Engines listed below - built for competition pulling only and to your pulling association/club sanctioning engine rules and requirements. All engines are built according to your pulling association/club sanctioning rules and requirements, or custom built to your preference. The Hot Stock class engines has an OEM Kohler block; runs at open RPM (no governor); 9-1/2" 32 lb. steel flywheel w/ring gear; high torque upper mount gear starter (mounting bolts are underneath the starter motor); A-1 Miller's Hot Stock/Stock-Altered welded-up and reground cast camshaft; single high performance valve springs; performance valve job with stock size valves; #26 or #30 Kohler carburetor (depending on engine size) bored-out, reworked, set up for gas with bottom main fuel adjuster; enlarged ports and polished (if the intake port is smaller in diameter than the carburetor throttle bore); 2nd or 3rd generation cylinder head milled .050"; connecting rod bored .020" offset for piston pop out with bearing inserts; rotating assembly (crankshaft and connecting rod/piston assembly) precision spin-balanced to reduce engine vibration. Also included are: flywheel shroud (not chrome plated), cast iron oil pan, bolt-on header pipe and conventional Kohler point ignition system installed with ignition timing preset. Upon receiving engine, install in tractor, add fluids and engine will be ready to start after all connections are made. Carburetor adjustments will be initially preset, but due to the altitude level, barometric pressure and air temperature, final adjustments may need to be made after engine is started. In addition to all the essentials, prices listed below include a 9-1/2" 32 lb. steel flywheel w/ring gear and new high torque gear starter motor (Kohler style or gear reduction type). Extra charge for gear reduction starter w/bracket. Extra charge for installing A-1 Miller's custom-made electronic ignition. Price depends on type of electronic ignition system installed. $100 to construct a sturdy wooden shipping crate with shipping & handling is extra charge. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) . Horsepower/torque and price depends on how the engine is built. (Past engines test ran on A-1 Miller's personal dynamometer with accurate results.) IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • 12hp (K301) Kohler Hot Stock or Sport Stock Open RPM Competition Pulling Engine. Dyno'd at 48hp± and 39± ft. lbs. of torque at 6,500 RPM.
    • With customer supplying engine block and most parts. $3,400± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
    • With A-1 Miller's supplying engine block and all parts. $4,400± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
  • 14hp (K321) Kohler Hot Stock or Sport Stock Open RPM Competition Pulling Engine. Dyno'd at 56hp± and 46± ft. lbs. of torque at 6,500 RPM.
    • With customer supplying engine block and most parts. $3,600± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
    • With A-1 Miller's supplying engine block and all parts. $4,600± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
  • 16hp (K341) Kohler Hot Stock or Sport Stock Open RPM Competition Pulling Engine. Dyno'd at 65hp± and 53± ft. lbs. of torque at 6,500 RPM.
    • With customer supplying engine block and most parts. $3,800± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground.
    • With A-1 Miller's supplying engine block and all parts. $4,800± for all parts and labor. Extra charge for crating and return shipping with FedEx Ground. NOTE: Price will be higher if an aftermarket block is used.

Click here to contact A-1 Miller's for FREE honest and accurate technical support and/or for ordering information and payment options. Please contact A-1 Miller's if you need a part or parts, or service(s) performed that's not listed or mentioned in this website. [Top of Page]

NEW! A-1 Miller's Professional Automotive Engine Rebuilding and Modification Services. And Build You a Competitive Mini Pulling Truck and Big Wheel Mini Rod Pulling Tractor. Chevrolet, GMC, Chrysler, Ford, Diesel engines, etc. More details and information coming later. Please click here to contact A-1 Miller's Performance Enterprises to place an order, send your parts for repairing, if you need a part or parts, or service(s) performed that's not listed or mentioned in this website, and/or for FREE professional and honest technical customer service assistance and support and payment options. [Top of Page] (Posted 2/10/24)

Break-In (Wear-In) Oils and Procedure for Newly Rebuilt Lawn and Garden Engines -

For proper break-in (wear-in) of a new or fresh rebuilt engine, use a high quality conventional (petroleum-based) SAE 30 weight motor oil containing a high zinc content anti-wear additive, such as ZDDP (Zinc dithiophosphate), so the internal moving parts, especially flat tappet lifters and camshaft lobes, will get hot, create a wear pattern and produce a hardened surface. Run an engine with aluminum cylinder wall(s) normally (up to 3,600 RPM) for 2 hours, or for an engine with cast iron cylinder wall(s), run it normally (up to 3,600 RPM) for 5 hours. Don't be afraid to run a fresh-built or freshly rebuilt engine at full governed speed. Just run the engine as usually off and on for 2 or 5 hours to perform lawn and/or garden work as usual. Idle speed should be set at 1,200 RPM (±75 RPM) so the oil dipper can lubricate the internal moving parts more thoroughly. This speed also allows the flywheel fins to blow adequate amount of air across the cylinder head and around the cylinder fins to cool the engine better. Then drain the oil while it's hot. Be sure to tighten the oil drain plug securely after draining the oil. But don't tighten the plug too tight because the oil pan could crack or the threads could strip out. Anyway, either continue to use conventional (petroleum-based) SAE 30 oil, or switch to a quality 10W40 synthetic blend or full synthetic oil for warm weather use. Or use conventional (petroleum-based) 10W40 oil, or 10W40 synthetic blend or full synthetic 10W30 oil during cold winter use. Use no oil additives. Change the oil every 25 hours of engine run time or once a year. Full synthetic oil don't get as hot as conventional (petroleum-based) oil does. It's more slippery and remains cooler than conventional (petroleum-based) oil even after the engine has been in operation for several hours to better protect internal parts for longer engine life. Adhering a very strong rare earth/neodymium magnet to the bottom of the oil pan inside an engine to attract metallic wear fragments will also help an engine last longer. Because some of the ferrous metallic wear fragments settle to the bottom of the oil pan, engine block or gearbox and do not drain out with the oil when performing an oil change, even when the oil is hot. And does the Slick 50 Advanced Formula Engine Treatment really prevent engine wear with no oil in the crankcase? Well, watch this video: This Engine Runs WITHOUT OIL!! HOW?? (https://www.youtube.com/watch?v=x1hvx_UZLEI). Remember - metal flake looks good in paint, not in oil.

Break-In (Wear-In) Oils and Procedure for Newly Built/Rebuilt Pulling Engines -

For proper break-in (wear-in) of a rebuilt or fresh built pulling engine, use a high quality conventional (petroleum-based) SAE 30 weight motor oil containing a high zinc content anti-wear additive, such as ZDDP (Zinc dithiophosphate), which places a protective coating between all internal moving parts, will get hot, create a wear pattern and produce a hardened surface, especially flat tappet lifters and camshaft lobes. Don't be afraid to run a fresh-built or freshly rebuilt pulling engine at speeds it is designed for. Just run the engine normally for 4-5 pulls. Idle speed should be set at 1,200 RPM (±75 RPM) so the oil dipper can lubricate the internal moving parts more thoroughly. This speed also allows the flywheel fins to blow adequate amount of air across the cylinder head and around the cylinder fins to cool the engine better. Then drain the oil while it's hot, and either continue to use ordinary SAE 30 oil, or switch to a quality 20W50 synthetic blend or full synthetic oil. Use no oil additives. Change the oil every 25 pulls or once a year. Synthetic-blend oils get about half as hot as conventional oils. But full synthetic oils don't get near as hot as conventional oils do. It's more slippery and remains cooler even after the engine have been in operation for several hours to better protect internal parts for longer engine life. Adhering a very strong rare earth/neodymium magnet to the bottom of the oil pan inside an engine to attract metallic wear fragments will also help an engine last longer. Because some of the ferrous metal wear fragments settle to the bottom of the oil pan or engine block and do not drain out with the oil when performing an oil change, even when the oil is hot. Remember - metal flake looks good in paint, not in oil.

If the tractor is geared correctly, the pulling engines I build should not run out of power at the end of the pull. It should spin the tires. But there's some things that needs to be checked after a few pulls as the engine breaks-in and parts wear into each other. For gas fuels, the ignition timing needs to be set at 22° BTDC. And make sure the high speed fuel mixture screw is set so the engine runs smooth at high RPM. NOTE: If a high-output/performance ignition coil is used, it require two ordinary (Kohler) condensers or one high-capacity/performance condenser. This is so the coil will produce full voltage. And with a high-output/performance coil, the spark plug gap can be set at .060". With an ordinary coil, it should be set at .035". The valve to lifter clearances may need to be reset at .010" for the intake and .014" for the exhaust.

Furthermore, when a new or rebuilt engine needs to "break-in," what the term "break-in" actually means is the moving internal parts that make contact with each other needs to "wear-in" with each other so they'll produce a wear pattern and last longer. Any new or rebuilt engine, rather if it's for general lawn and garden use, snow removal or for competition pulling, needs to fully break-in (wear-in) for it to produce full power. Rings don't "seat," they break-in, or wear-in with the cylinder wall, and they wear-in quickly. But the valves are the parts that needs to "seat." Being the valve faces and seats have different angles (30°/31° or 45°/46°, respectively), the valve faces needs to wear into the seats to seal in the compression 100%. Wear-in will produce a 30½° or 45½° angle on both the matching valve face and seat. The harder material the valves are made of, the longer it takes for them to wear-into the seats. Some pullers tell me that the engines I built for them run better every time they pull them. I remember a few years ago when I performed a valve job on my 350 Chevy truck engine. It ran good and produced plenty of power, but I noticed after about 1,000 or so miles, it produced a little more power. I realized that this is because the valve faces wore into the seats, forming a perfect seal. So again, a fresh-built pulling engine will not produce full power the first few times it's ran. - Brian Miller | Go here for more information: Valvoline.com > FAQs > Motor Oil Car FAQs > Racing Oil. Return To Previous Paragraph, Web Site or Section È Valvoline.com FAQs Motor Oil Car Racing Oil. [Return to Previous Section, Paragraph or Website]

What makes crankcase oil to have a black appearance after a while is caused by blow-by of the combustion process due to either: excessively wide gaps in worn piston rings; carburetor flooding; idle air/fuel mixture set too rich, resulting in engine running rich on fuel; or prolonged slow idling with a [high-performance] long duration camshaft. The excessive unburned/partially burned gas will seep past the piston ring end gaps and into the crankcase oil, contaminating and diluting it, eventually break down the protective additives in the oil, causing sludge, resulting in premature wear to internal moving parts. This is why it's so important to have a "fine tuned engine" and change the oil regularly. Remember - fresh, clean oil in an engine is cheaper than a new engine or engine rebuild!

Oil Refill Quantities for Older Kohler Engines - IMPORTANT: Make sure the correct oil dipstick is used and it's calibrated correctly! *NOTE: Add 1/8 quart for a competition pulling tractor that have a single cylinder longitudinal engine with a lowered front-end.

Engine Model(s)

Engine Model(s)

Engine Model(s)*

Engine Model(s)*

Engine Model(s)

Engine Model(s)

Engine Model(s)

K90/K91 K141, K160/K161, K181, L160/L161, L181 and M8 K241A, M10, K301A, M12, K321A, M14, K341A, M16 K241, M10, K301, M12, K321, M14, K341, M16, K361 KT17 (first design), KT17 Series II, KT19 (first design), KT19 Series II, KT21, M18, M20

MV16, MV18, MV20

K482, K532, K582, K660/K662
3/4 Quart 1-1/4 Quarts (Full mark is 3/8" above oil pan gasket.) 1 Quart for engines with a flat bottom narrow base oil pan. 1-1/2 Quarts for engines with a deep sump narrow base oil pan. (Full mark is 3/8" above oil pan gasket.) 2 Quarts for engines with a wide base oil pan. (Full mark 3/8" above oil pan gasket.) 1 Quart without oil filter | 1-1/2 Quarts with oil filter.

1-1/4 Quarts without oil filter | 1-3/4 Quarts with oil filter.

3 Quarts | Add 1/2 quart for K482, K4532, K582 when replacing filter. Add 1 quart for K660/K662 when replacing filter.

NOTES:

Ship the Engine Securely Fastened Inside a Sturdy Wooden Crate - [Return To Previous Paragraph, Section or Website]

Before shipping or bringing your engine to A-1 Miller's in person, we don't need everything on it. Just the parts that can wear and need rebuilding or reconditioning, such as the carburetor, fuel pump, gear starter, cylinder head and crankcase breather assembly. I'll need the oil pan on it too, to prevent any dust and dirt from entering the crankcase after the rebuild. I'll need the flywheel on the engine so we can set the ignition timing. Please remove all baffle shields (sheet metal) and the PTO clutch assembly, too. By the way - As business is booming, we can rebuild the Cub Cadet garden tractor mechanical PTO clutch, too. We have a heavy duty 2-jaw gear puller that we use with a large C-clamp to remove/pull off the mechanical PTO clutch/pulley assembly from engines out of an IH Cub Cadet garden tractor. But sometimes these clutch/pulleys will not remove without breaking. We do all we can to try to prevent this from happening, but when they do break, we have no choice but to install a rebuilt PTO clutch/pulley assembly. We also made a special puller tool to remove the stamped steel PTO pulley/basket from the crankshaft without damage. Regular shop hours are 9:00 am - 5:00 pm, Monday-Friday. And we're open on weekends by appointment only. Please call, text or email me before coming so I'll be at my shop waiting for your arrival. If you are traveling a great distance, it's best to call in advance (573-544-9008 (new number; land line) | 1-573-881-7229 (cell; call or text) to make sure that we will be here when you plan to stop by. Please ship or bring your engine when you're ready to the address below. Ê

If you bring your engine to A-1 Miller's in person, place it in a medium size automotive tire to keep it from moving around during transportation. But if you decide to ship your engine to A-1 Miller's, first off, do not use the USPS, UPS or FedEx Express! We and our customers have had too many problems with these shippers in the past. Their clumsy, incompetent and uncaring "gorilla" workers have a tendency to damage heavy items, and the shipping company's insurance rarely pay off. The shipping company claim that the damaged item, which was in their possession, is "not their fault." They are very careless with heavy packages when they handle them. The packages are placed on conveyor-belt systems and they seem to always drop the heavy ones off of the elevated conveyors, which usually destroys whatever is inside them. Or if you're the kind of person who don't trust delivery/shipping companies (mis)handling your high-dollar and fragile merchandise, you can make the long drive to A-1 Miller's (old) shop to personally purchase parts, or drop off and/or pick up your carburetor, clutch assembly, engine parts, entire engine, transmission, transaxle, garden tractor, small motorized vehicle, etc. for repairing and/or rebuilding. "The road to a friend's house (or shop) is never long." Don't sacrifice quality workmanship for distance.

By the way - As business is booming, we're going to relocate our business soon at 12091 N. Rt. B, Hallsville, MO 65255 with a bigger, better, fully insulated, heated and air-conditioned building/shop (shouse) so we can provide many more high quality parts and professional services, and hire more help to have our customer's parts orders fulfilled sooner, parts repairs and engine rebuilds performed promptly without delay. We will also provide pick up and delivery service and perform professional repairs for various small engines and lawn & garden equipment! Photos of our new building/shop are posted here!

If shipping an engine, and if the crated engine weighs no more than 150 lbs., use only FedEx Ground for dependability. The average crated cast iron block Kohler engine weighs just under 150 lbs. Use this website to calculate the shipping cost for your engine: FedEx Rates and Transit Times. Contact your local FedEx Ground shipping center for more details and to schedule a pickup or drop off the crated engine at your local FedEx Ground shipping center. FedEx Ground is the only reasonably-priced shipping service that we know of for items up to 150 lbs. US Mail only ship up to 70 lbs. And FedEx Freight would cost almost as much as an engine is worth. If your engine is too heavy to go with FedEx Ground, partially disassemble it and send the lightweight parts in a USPS Large or Medium Flat Rate Box, and then send the main short block with FedEx Ground, the crated engine can be shipped through Fastenal. This also works better to save money on shipping costs. Or to save on crating and shipping charges, you can visit A-1 Miller's (old) shop at 1501 W. Old Plank Rd., Columbia, MO 65203 to drop off and pick up your engine(s) .

Do not use a cardboard box alone the ship a heavy engine! Crate it well and any other parts with it securely so they won't get damaged or lost in shipping. A sturdy and well-constructed wooden crate can be ordered from: Crates, Wooden Crate in Stock - ULINE. But to construct your own sturdy wooden shipping crate, use 2x2's or 2x4's lumber for the frame work, with 1/4" plywood or 1/2" chipboard as outer covering (do not use cardboard for covering because another person's package could penetrate it and cause damage the engine inside), and a couple of 2x4's or a cut-down shipping pallet on the bottom so a forklift can move it without damage. Make the crate compact as possible so it'll take up less space, save on shipping charges and so it'll be easier to move around in our shop. Fasten the engine oil pan mounting bolt holes to two sturdy 2x4's on the base of the crate securely with 3/8" diameter bolts with wide flat washers. It's also very important to install 2x4 wood bracing all around the engine cylinder (front, rear and each side) stabilize it in the crate. And for easy engine removal, PLEASE use Phillips head drywall/sheetrock screws or better yet, use hex head 1/4" lag bolts w/flat washers to fasten everything on and in the crate. Be sure to include a note in a sealed plastic bag with your name, complete and correct postal address, phone number, email address (in case we have any questions) and a detailed description of how you want the engine built and what it will be used for, and mention in the note any other parts you may need.

When the work is completed, I'll contact you with the total including return shipping & handling. For payment options for parts ordered or services performed, or to make a donation to my websites, we accept cash (in person), USPS Postal Money Orders, cashier's checks, business checks, MasterCard, VISA, Discover, American Express (please add 2.5% to the total for the credit/debit card processor's surcharge), Western Union Money Transfer or MoneyGram Money Transfers. (If the engine is for a specific purpose and parts must be special ordered, full payment will be required right after your order is placed or your debit/credit card will be charged for the full amount or as a deposit.) Or you can pay A-1 Miller's through PayPal. My PayPal account name is my email address, and be sure to mention in PayPal a description of what the payment is for. If sending a money order or cashier's check, please include a note in the envelope with your name, complete mailing address, phone number and a description of what the payment is for. My mailing address and phone number are below Ê. And we will ship your rebuilt engine/parts to you as soon as we receive your payment.

To ship a transaxle, this is easier. They don't require an enclosed crate. Just place the transaxle on the center of a shipping pallet (of the appropriate size) and stretch wrap (use low-cost ratchet nylon tie-downs) to securely fasten it to the pallet. Use at least 6 layers of stretch wrap or several tie-downs. This should work really well. The shipping weight of a Cub Cadet garden tractor cast iron case transaxle when strapped to a wooden pallet is approximately 215 lbs. [Return To Previous Paragraph, Section or Website]


Click Here for Detailed Illustrated Plans on How to Construct a Professional Pull-Back and Self-Propelled Garden Tractor Pulling Sled (Available Soon) FYI - The self-propelled garden tractor pulling sled that I built is such an excellent design, I realized later that I made something very special when other people copied after it. - Brian Miller


To place an order, send your item(s) for repairing, and/or for customer service assistance, and FREE honest and accurate technical support, please contact: A-1 Miller's Performance Enterprises, 12091 N Rte B, Hallsville, MO (Missouri) 65255-9604 USA. Please call in your order or send an email with a list parts you need and your contact information. Phone: 1-573-881-7229 (cell; call, text or leave voicemail) or use Whatsapp. Please call Monday-Friday, 9am to 5pm, Central time zone, except holidays. If no answer, please try again later. (When speaking with Brian on the phone, please be patient and understanding because I stutter.) E-mail: pullingtractor@aol.com. Payment Options. A-1 Miller's shop is open to the public Monday-Friday, 9am to 5pm, Central time zone, with an appointment on weekends, except holidays. If you're the kind of person who don't trust delivery/shipping companies (mis)handling your high-dollar and fragile merchandise, you can make the long drive to A-1 Miller's new shop (click image to the right) to personally purchase parts, or drop off and/or pick up your carburetor, clutch assembly, engine and/or parts, etc., for repairing and/or rebuilding. Or visit the address of our (old) shop mentioned above to drop off your engine, transmission, transaxle, garden tractor, small motorized vehicle, etc. We also custom build pulling tractors and other small vehicles. Please contact me before coming so I'll be at my shop waiting for your arrival. When you visit our shop, you will be dealing directly with the owner for the best customer service. 12091 N Rte B, Hallsville, MO - Google Maps "The road to a [trusted] friend's house (or shop) is never long." Don't sacrifice quality workmanship for distance. [Return To Previous Paragraph, Section or Website]

By the way - As business is booming, we relocated our business at 12091 N. Route B, Hallsville, MO 65255 with a new, bigger, better, fully insulated, heated and air-conditioned building/shop (shouse) so we can provide many more professional services and high quality parts, and hire more reliable and knowledgeable help to have our customer's parts orders fulfilled sooner, parts repaired sooner and engine rebuilds performed promptly without a long delay. We will also offer custom welding fabrication jobs and other custom services. And we also provide pick up and delivery service and perform professional repairs for various small engines and lawn & garden equipment! Photos of our new building/shop are posted here! 12091 N Rte B, Hallsville, MO - Google Maps

Payment Options, and We Ship to Canada and Worldwide
Item(s) in a package or cushioned envelope weighing less than 1 lb. is sent by US Postal Service Airmail Letter Post for a 4-7 days delivery. Packaged item(s) weighing over 1 lb. and up to 66 lb. is sent by US Postal Service Airmail Parcel Post for a 4-10 days delivery. I cannot use the US Postal Services' Flat Rate Priority Mail envelopes and boxes to ship outside U.S. territories. Item(s) weighing over 67 lbs. or more is sent by FedEx Ground or equivalent services. We try to keep our shipping cost to customers within reason. Therefore, we don't ship our products in a fancy-looking package with our company name and/or logo on it because most customers will just toss it in the trash after they remove the contents. And being there is no USPS tracking number outside the US, all I can do is make sure I write your address correctly on the customs form and on your package.

My websites are not set up to process orders and accept payments. Therefore, to place an order with me, please call either number above or send an email with a list of parts you need, with your name, complete and correct postal mailing address and phone number. For payment options, I accept cash (in person), USPS Postal Money Orders, cashier's checks, business checks, MasterCard, VISA, Discover, American Express (please add 2.5% to the total amount for the credit/debit card processor's surcharge). If paying with a credit/debit card, please call me at either number above. Or to make a payment to me through PayPal, please click this link: https://www.paypal.com. Or use Cash App (username: pullingtractor) or Venmo (username: Pullingtractor) to make a payment to me. And be sure to mention a description of what the payment is for with your full name, postal address, phone number and email address. I also accept payments through Western Union Money Transfer or MoneyGram Money Transfers. If sending a money order or cashier's check, please include a note in the envelope with your name, complete mailing address, phone number, email address and a description of what the payment is for. I'll make a note of your order when I have all your information, and I may have to order some of the parts on your list, which should take a few days to come in, but I will send everything to you as soon as I have the parts in stock after I receive your payment.



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