OEM & Cross Reference Numbers

Yamaha Outboard Fitment

Genuine Yamaha OEM Option

Yamaha OEM Intake Valve Stem Seal - K0A-A3721-00-00

Prefer genuine Yamaha? Pro Marine also stocks the OEM intake valve stem seal for the same compatible applications.

Brand: Yamaha OEM
OEM Number: K0A-A3721-00-00

View Yamaha OEM Intake Valve Seal

Related Cylinder Head Rebuild Parts

Pro Marine Valve Spring - 67F-12114P

Replacement valve spring for compatible Yamaha F75-F115 four-stroke cylinder heads.

OEM: 67F-12114-00-00

View Valve Spring

Yamaha OEM Exhaust Valve Stem Seal

Genuine Yamaha OEM exhaust-side valve stem seal for compatible four-stroke cylinder heads.

Brand: Yamaha OEM

View OEM Exhaust Valve Seal

Pro Marine Exhaust Valve Stem Seal - A3722

Aftermarket exhaust valve stem seal for compatible Yamaha four-stroke engines.

Brand: Pro Marine

View Pro Marine Exhaust Seal

Pro Marine Intake Valve - 68V-12111P

Length: 96.9mm
Head Diameter: 29mm

Replacement intake valve for compatible Yamaha four-stroke cylinder-head rebuilds.

View Intake Valve

Pro Marine Exhaust Valve - 68V-12121P

Length: 99.3mm
Head Diameter: 23.9mm

Replacement exhaust valve for compatible Yamaha four-stroke cylinder-head rebuilds.

View Exhaust Valve

Valve Train Service Components

What This Part is Used For

The intake valve stem seal fits around the intake valve stem and helps regulate the amount of engine oil that passes between the valve stem and valve guide.

The valve guide requires lubrication, but excessive oil entering past the guide can reach the intake port and combustion chamber. The valve stem seal helps control this oil flow while allowing the valve to move normally.

Why Intake Valve Stem Seals Matter

Valve stem seals operate in a high-temperature environment and can become hardened, worn or damaged over time. A deteriorated seal may allow excess oil into the combustion chamber.

During a cylinder-head rebuild, replacing valve stem seals while the valves are already removed can prevent having to disassemble the valve train again later.

When to Replace Valve Stem Seals

• During a complete cylinder-head rebuild
• When replacing intake or exhaust valves
• When servicing valve guides
• If seals are hardened, cracked, flattened or damaged
• When excessive oil usage is traced to the cylinder head
• After overheating or cylinder-head damage
• During a complete powerhead overhaul

Inspect These Components at the Same Time

• Intake valves
• Exhaust valves
• Exhaust valve stem seals
• Valve guides
• Valve seats
• Valve springs
• Spring retainers and keepers
• Camshaft lobes and journals
• Cylinder-head sealing surfaces

Shop Yamaha Engine Rebuild Parts by Model

Pro Marine stocks pistons, piston rings, main bearings, rod bearings, cylinder sleeves, valves, valve seals, gaskets and other internal Yamaha four-stroke engine components.

Shop Yamaha Engine Rebuild Parts by Model

Key Features

• Pro Marine aftermarket intake valve stem seal
• Pro Marine part number A3721
• Replaces Yamaha K0A-A3721-00-00
• Fits select Yamaha F75 four-stroke applications
• Fits select Yamaha F80 four-stroke applications
• Fits select Yamaha F90 four-stroke applications
• Fits select Yamaha F100 four-stroke applications
• Fits extensive Yamaha F115 applications
• Fits Yamaha LF115 applications
• Genuine Yamaha OEM intake seal available as an alternative
• OEM and Pro Marine exhaust valve seals linked above
• Valve spring linked above
• Pro Marine intake and exhaust valves linked above

FAQ

What Yamaha OEM number does Pro Marine A3721 replace?
A3721 replaces Yamaha K0A-A3721-00-00.

Is A3721 a Yamaha OEM part?
No. A3721 is the Pro Marine aftermarket version.

Can I buy the Yamaha OEM version instead?
Yes. The genuine Yamaha K0A-A3721-00-00 intake valve stem seal is linked above.

Does A3721 fit Yamaha F115?
Yes. The supplied fitment includes extensive F115 applications from early engines through later models.

Does this fit Yamaha F75, F80, F90 and F100?
Yes. Select models from each of those engine families are included in the verified fitment above.

Does A3721 fit Yamaha LF115?
Yes. Multiple LF115 applications are included.

Do you stock the exhaust valve stem seal?
Yes. Both Yamaha OEM K0A-A3722 and Pro Marine A3722 exhaust valve stem seals are linked above.

Do you stock the intake and exhaust valves?
Yes. Pro Marine 68V-12111P intake and 68V-12121P exhaust valves are linked above.

Do you stock the valve spring?
Yes. The Pro Marine 67F-12114P valve spring is linked above.

Searchable Part Numbers & Terms

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OEM Number

Yamaha Outboard Fitment

Pro Marine Aftermarket Option

Pro Marine Exhaust Valve Stem Seal - A3722

Pro Marine aftermarket replacement for the compatible Yamaha OEM exhaust valve stem seal application.

Brand: Pro Marine
Type: Exhaust Valve Stem Seal
Replaces: K0A-A3722-00-00

View Pro Marine Exhaust Valve Seal

Related Cylinder Head Rebuild Parts

Pro Marine Valve Spring - 67F-12114P

Replacement valve spring for compatible Yamaha F75-F115 four-stroke cylinder heads.

OEM: 67F-12114-00-00
Mercury Cross Reference: 804131

View Valve Spring

Yamaha OEM Intake Valve Stem Seal

Matching genuine Yamaha intake-side valve stem seal for compatible cylinder heads.

OEM: K0A-A3721-00-00

View OEM Intake Valve Seal

Pro Marine Intake Valve Stem Seal - A3721

Aftermarket intake valve stem seal for compatible Yamaha four-stroke cylinder heads.

Replaces: K0A-A3721-00-00

View Pro Marine Intake Seal

Pro Marine Intake Valve - 68V-12111P

Length: 96.9mm
Head Diameter: 29mm

Replacement intake valve for compatible Yamaha four-stroke cylinder-head rebuilds.

View Intake Valve

Pro Marine Exhaust Valve - 68V-12121P

Length: 99.3mm
Head Diameter: 23.9mm

Replacement exhaust valve for compatible Yamaha four-stroke cylinder-head rebuilds.

View Exhaust Valve

Valve Train Service Components

What This Part is Used For

The exhaust valve stem seal fits around the exhaust valve stem and helps control the amount of engine oil passing between the valve stem and valve guide.

The exhaust valve operates in a particularly high-temperature area of the cylinder head. The valve stem seal must provide controlled lubrication to the valve stem and guide while limiting excessive engine oil from entering the exhaust port or combustion chamber.

Why Exhaust Valve Stem Seals Matter

Valve stem seals are exposed to repeated heat cycles and can harden, deteriorate or become damaged over time. A worn seal may allow excessive oil to travel past the valve guide.

During a cylinder-head rebuild, replacing worn valve seals while the valve train is already disassembled can help prevent future oil-control issues and avoid additional cylinder-head disassembly.

When to Replace Exhaust Valve Stem Seals

• During a complete cylinder-head rebuild
• When replacing exhaust valves
• When servicing valve guides
• If the existing seal is hardened, cracked or damaged
• When excessive oil consumption is traced to the cylinder head
• After engine overheating or valve-train damage
• During a complete powerhead overhaul

Inspect These Components at the Same Time

• Exhaust valve stems
• Intake valve stems
• Intake valve stem seals
• Valve guides
• Valve seats
• Valve springs
• Valve spring retainers
• Valve keepers
• Camshaft lobes and journals
• Cylinder-head sealing surfaces

Shop Yamaha Engine Rebuild Parts by Model

Pro Marine stocks pistons, piston rings, crankshaft bearings, connecting rod bearings, cylinder sleeves, intake and exhaust valves, valve seals, gaskets and other internal Yamaha four-stroke components.

Shop Yamaha Engine Rebuild Parts by Model

Key Features

• Genuine Yamaha OEM exhaust valve stem seal
• OEM number K0A-A3722-00-00
• Fits select Yamaha F75 applications
• Fits select Yamaha F80 applications
• Fits select Yamaha F90 applications
• Fits select Yamaha F100 applications
• Fits extensive Yamaha F115 applications
• Fits Yamaha LF115 applications
• Pro Marine A3722 aftermarket alternative linked above
• OEM and Pro Marine intake valve seals linked above
• Valve spring linked above
• Replacement intake and exhaust valves linked above

FAQ

What is the Yamaha OEM number for this exhaust valve seal?
The OEM number is K0A-A3722-00-00.

Is this a genuine Yamaha part?
Yes. This listing is for the Yamaha OEM exhaust valve stem seal.

Do you have a Pro Marine version?
Yes. The Pro Marine A3722 aftermarket exhaust valve seal is linked above.

Does K0A-A3722-00-00 fit Yamaha F115?
Yes. The supplied fitment includes extensive F115 applications from early engines through later model variants.

Does this fit Yamaha F75, F80, F90 and F100?
Yes. Select applications from each of those Yamaha four-stroke engine families are included in the fitment above.

Does it fit Yamaha LF115?
Yes. Multiple LF115 applications are included.

Do you stock the intake valve stem seal?
Yes. Both the Yamaha OEM K0A-A3721-00-00 and Pro Marine A3721 intake valve stem seals are linked above.

Do you stock the exhaust valve?
Yes. The Pro Marine 68V-12121P exhaust valve is linked above.

Do you stock the intake valve?
Yes. The Pro Marine 68V-12111P intake valve is linked above.

Do you stock the valve spring?
Yes. The Pro Marine 67F-12114P valve spring is linked above.

Searchable Part Numbers & Terms

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OEM Numbers & Cross References

Valve Specifications

Yamaha Outboard Fitment

Mercury Outboard Fitment

Mercury fitment below is based on the Mercury catalog applications shown for this valve family.

Matching Pro Marine Intake Valve

Pro Marine Intake Valve - 68V-12111P

Matching Pro Marine intake valve for compatible Yamaha / Mercury four-stroke cylinder-head rebuilds.

Length: 96.9mm
Head Diameter: 29mm

OEM Numbers: 67F-12111-00-00, 68V-12111-00-00, 804128T

View Pro Marine Intake Valve

Related Cylinder Head Rebuild Parts

Pro Marine Valve Spring - 67F-12114P

Replacement valve spring for compatible Yamaha / Mercury four-stroke cylinder heads.

OEM Numbers: 67F-12114-00-00, 804131

View Valve Spring

Yamaha OEM Intake Valve Stem Seal

Genuine Yamaha intake-side valve stem seal for compatible cylinder-head applications.

OEM Number: K0A-A3721-00-00

View OEM Intake Valve Seal

Pro Marine Intake Valve Stem Seal - A3721

Pro Marine aftermarket intake valve stem seal for compatible four-stroke applications.

Replaces: K0A-A3721-00-00

View Pro Marine Intake Seal

Yamaha OEM Exhaust Valve Stem Seal

Genuine Yamaha exhaust valve stem seal for compatible Yamaha four-stroke cylinder heads.

OEM Number: K0A-A3722-00-00

View OEM Exhaust Valve Seal

Pro Marine Exhaust Valve Stem Seal - A3722

Pro Marine aftermarket exhaust valve stem seal for compatible Yamaha four-stroke cylinder heads.

Replaces: K0A-A3722-00-00

View Pro Marine Exhaust Seal

Complete Valve Train Components

What This Part is Used For

The exhaust valve opens during the engine's exhaust stroke to allow combustion gases to leave the cylinder. It then closes against the valve seat so the cylinder can seal during the next compression and combustion cycle.

Exhaust valves operate in one of the hottest areas of the cylinder head, making correct valve condition, valve-seat contact and valve-guide clearance especially important.

When Should an Exhaust Valve Be Replaced?

Exhaust valves should be inspected whenever the cylinder head is removed or rebuilt. A burned, bent, worn or damaged exhaust valve can prevent the cylinder from sealing correctly and contribute to poor compression and engine performance.

Always inspect the valve seat, guide and stem seal when replacing the exhaust valve.

Common Reasons for Exhaust Valve Replacement

• Burned or damaged valve face
• Bent valve stem
• Piston-to-valve contact
• Excessive valve stem wear
• Corrosion or pitting
• Valve face no longer sealing correctly
• Low cylinder compression caused by valve leakage
• Cylinder-head rebuilding
• Complete powerhead overhaul

Inspect These Parts During Exhaust Valve Replacement

• Exhaust valve seat
• Exhaust valve guide clearance
• Exhaust valve stem seal
• Intake valve and intake valve stem seal
• Valve spring
• Valve retainer and keepers
• Camshaft lobes and journals
• Cylinder-head sealing surface

Shop Yamaha Engine Rebuild Parts by Model

Pro Marine stocks pistons, piston rings, crankshaft main bearings, connecting rod bearings, cylinder sleeves, intake and exhaust valves, valve stem seals, gaskets and other internal Yamaha four-stroke engine components.

Key Features

• Pro Marine aftermarket exhaust valve
• Part number 68V-12121P
• 99.3mm overall length
• 23.9mm head diameter
• Replaces Yamaha 67F-12121-00-00
• Replaces Yamaha 68V-12121-00-00
• Replaces Yamaha 68V-12121-01-00
• Cross references Mercury 804129T
• Fits select Yamaha F75 engines
• Fits select Yamaha F80 engines
• Fits select Yamaha F90 engines
• Fits select Yamaha F100 engines
• Fits extensive Yamaha F115 and LF115 applications
• Fits select Mercury 75-115HP four-stroke engines
• Matching Pro Marine intake valve linked above
• Valve spring linked above
• OEM and Pro Marine intake valve seals linked above
• OEM and Pro Marine exhaust valve seals linked above

FAQ

What OEM numbers does 68V-12121P replace?
It replaces Yamaha 67F-12121-00-00, 68V-12121-00-00 and 68V-12121-01-00, and cross references Mercury 804129T.

What size is the 68V-12121P exhaust valve?
The valve measures 99.3mm long with a 23.9mm head diameter.

Does 68V-12121P fit Yamaha F115?
Yes. The supplied fitment includes extensive Yamaha F115 and LF115 applications.

Does this exhaust valve fit Yamaha F75, F80, F90 and F100?
Yes. Select applications from each of those engine families are included in the verified fitment above.

Does this fit Mercury 115 EFI?
Yes. Mercury catalog fitment includes 115HP EFI applications in 0T178500 thru 0T800999, 0T801000 thru 1B226999, and 1B227000 thru 1B366822.

What other Mercury engines use this exhaust valve?
Catalog applications also include select Mercury 75HP and 90HP carbureted models and 75HP, 80HP, 90HP and 100HP EFI engines.

Do you stock the matching intake valve?
Yes. The Pro Marine 68V-12111P intake valve is linked above.

Do you stock the exhaust valve stem seal?
Yes. Both the Yamaha OEM K0A-A3722-00-00 and Pro Marine A3722 exhaust valve seals are linked above.

Do you stock the intake valve stem seal?
Yes. Both the Yamaha OEM K0A-A3721-00-00 and Pro Marine A3721 intake valve seals are linked above.

Do you stock the valve spring?
Yes. The Pro Marine 67F-12114P valve spring is linked above.

Searchable Part Numbers & Terms

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OEM Numbers & Cross References

Valve Specifications

Yamaha Outboard Fitment

Mercury Outboard Fitment

Mercury fitment below is based on the catalog applications for the 804128T intake valve.

Matching Pro Marine Exhaust Valve

Pro Marine Exhaust Valve - 68V-12121P

Matching Pro Marine exhaust valve for compatible Yamaha four-stroke cylinder-head rebuilds.

Length: 99.3mm
Head Diameter: 23.9mm

View Pro Marine Exhaust Valve

Related Cylinder Head Rebuild Parts

Pro Marine Valve Spring - 67F-12114P

Replacement valve spring used in compatible Yamaha / Mercury four-stroke cylinder heads.

OEM: 67F-12114-00-00
Mercury: 804131

View Valve Spring

Yamaha OEM Intake Valve Stem Seal

Genuine Yamaha OEM intake valve stem seal used with compatible cylinder-head applications.

OEM: K0A-A3721-00-00

View OEM Intake Valve Seal

Pro Marine Intake Valve Stem Seal - A3721

Pro Marine aftermarket intake valve stem seal for compatible Yamaha four-stroke engines.

Replaces: K0A-A3721-00-00

View Pro Marine Intake Seal

Yamaha OEM Exhaust Valve Stem Seal

Genuine Yamaha OEM exhaust valve stem seal for compatible four-stroke cylinder heads.

OEM: K0A-A3722-00-00

View OEM Exhaust Valve Seal

Pro Marine Exhaust Valve Stem Seal - A3722

Pro Marine aftermarket exhaust valve stem seal for compatible Yamaha four-stroke cylinder heads.

Replaces: K0A-A3722-00-00

View Pro Marine Exhaust Seal

Complete Valve Train Components

What This Part is Used For

The intake valve opens during the engine's intake cycle to allow the air / fuel charge to enter the combustion chamber. The valve then closes against its seat so the cylinder can seal during compression and combustion.

Proper valve sealing is critical to cylinder compression, combustion efficiency and overall engine performance.

When Should an Intake Valve Be Replaced?

Intake valves should be carefully inspected whenever the cylinder head is removed or rebuilt. A damaged valve may not seal correctly against the valve seat and can contribute to low compression or poor engine performance.

Valve condition should be evaluated together with the valve guide and valve seat rather than replacing the valve alone without inspecting the mating components.

Common Reasons for Intake Valve Replacement

• Bent valve stem
• Valve-to-piston contact
• Damaged or burned valve face
• Excessive valve stem wear
• Corrosion or pitting
• Valve face no longer sealing correctly
• Cylinder-head rebuild
• Major powerhead overhaul

Inspect These Parts During Valve Replacement

• Valve seat condition
• Valve guide clearance
• Intake valve stem seal
• Exhaust valve and exhaust valve stem seal
• Valve spring condition
• Valve retainers and keepers
• Camshaft lobes
• Camshaft journals
• Cylinder-head sealing surface

Shop Yamaha Engine Rebuild Parts by Model

Pro Marine stocks pistons, piston rings, crankshaft bearings, connecting rod bearings, cylinder sleeves, valves, valve stem seals, gaskets and other internal Yamaha four-stroke engine components.

Key Features

• Pro Marine aftermarket intake valve
• Part number 68V-12111P
• 96.9mm overall length
• 29mm head diameter
• Replaces Yamaha 67F-12111-00-00
• Replaces Yamaha 68V-12111-00-00
• Cross references Mercury 804128T
• Fits select Yamaha F75 engines
• Fits select Yamaha F80 engines
• Fits select Yamaha F90 engines
• Fits select Yamaha F100 engines
• Fits extensive Yamaha F115 and LF115 applications
• Fits select Mercury 75-115HP four-stroke engines
• Matching Pro Marine exhaust valve linked above
• Valve spring linked above
• OEM and Pro Marine intake valve seals linked above
• OEM and Pro Marine exhaust valve seals linked above

FAQ

What OEM numbers does 68V-12111P replace?
It replaces Yamaha 67F-12111-00-00 and 68V-12111-00-00, and cross references Mercury 804128T.

What size is the 68V-12111P intake valve?
It measures 96.9mm long with a 29mm head diameter.

Does 68V-12111P fit Yamaha F115?
Yes. The supplied fitment includes extensive Yamaha F115 and LF115 applications.

Does this valve fit Yamaha F75, F80, F90 and F100?
Yes. Select applications from each of those Yamaha engine families are listed above.

Does this intake valve fit Mercury 115 EFI?
Yes. Mercury catalog applications include 115HP EFI engines in 0T178500 thru 0T800999, 0T801000 thru 1B226999, and 1B227000 thru 1B366822.

What other Mercury engines use this valve?
Catalog applications also include select Mercury 75HP and 90HP carbureted engines and 75HP, 80HP, 90HP and 100HP EFI engines.

Do you stock the matching exhaust valve?
Yes. The Pro Marine 68V-12121P exhaust valve is linked above.

Do you stock the intake valve stem seal?
Yes. Pro Marine stocks both Yamaha OEM K0A-A3721-00-00 and Pro Marine A3721 intake valve seals.

Do you stock the exhaust valve stem seal?
Yes. Both Yamaha OEM K0A-A3722-00-00 and Pro Marine A3722 exhaust valve seals are linked above.

Do you stock the valve spring?
Yes. The Pro Marine 67F-12114P valve spring is linked above.

Searchable Part Numbers & Terms

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Specifications

Yamaha Inline 4-Cylinder Application

The Advanced Sleeve 1185SC is designed for compatible Yamaha inline 4-cylinder four-stroke powerheads.

Cylinder sleeves are typically used during major powerhead rebuilding when the original cylinder wall is too worn, scored, corroded, damaged, or previously machined beyond the point where a normal oversize piston repair is practical.

Alternate 3.270" OD Cylinder Sleeve

Advanced Sleeve 1185SA - 3.270" Outside Diameter

Alternate replacement sleeve for compatible Yamaha inline four-cylinder four-stroke powerheads.

Outside Diameter: 3.270"
Bore: 3.118"
Length: 5.195"

The 1185SA uses a .040" smaller outside diameter than the 1185SC while retaining the same nominal bore and length.

View 1185SA 3.270" OD Sleeve

1185SC vs. 1185SA Cylinder Sleeve

What a Replacement Cylinder Sleeve Does

A replacement cylinder sleeve restores the cylinder wall when the original bore is no longer suitable for normal rebuilding. The damaged cylinder area is machined to accept the replacement sleeve, allowing the block to be repaired instead of discarded.

Once installed, the sleeve is bored and honed to the correct finished size for the piston that will be used in the rebuilt engine.

When the 3.310" OD Sleeve May Be Used

The larger outside diameter of the 1185SC provides additional material for applications where the block has been machined larger, has suffered more extensive cylinder-wall damage, or requires the larger sleeve outside diameter during the repair process.

The machine shop should determine which sleeve outside diameter is appropriate after inspecting and measuring the block.

Common Reasons to Install a Cylinder Sleeve

• Deep piston or cylinder-wall scoring
• Broken piston or piston-ring damage
• Severe cylinder corrosion
• Excessive cylinder taper
• Excessive out-of-round condition
• Damage beyond available oversize piston dimensions
• Previously bored cylinder requiring restoration
• Major Yamaha powerhead rebuilding

Machine Shop Installation

Cylinder sleeve installation requires precision machining. The engine block must be measured and machined for the correct sleeve fit before installation.

After the sleeve is installed, the cylinder must be bored and honed to the proper finished dimension and piston-to-wall clearance for the piston being installed.

Standard or Oversize Piston After Sleeving?

One advantage of installing a replacement sleeve is that the machinist can finish the repaired cylinder for the piston size selected for the rebuild.

Depending on the engine, piston availability and condition of the remaining cylinders, the sleeved cylinder may be finished for a standard or compatible oversize piston.

Parts to Inspect During a Cylinder Sleeve Repair

• Pistons and piston size
• Piston rings
• Finished cylinder bore
• Piston-to-wall clearance
• Connecting rods
• Connecting rod bolts
• Connecting rod bearings
• Crankshaft main bearings
• Crankshaft journals
• Cylinder head and sealing surface
• Valves and valve stem seals
• Powerhead gaskets and seals

Shop Yamaha Engine Rebuild Parts by Model

Pro Marine stocks the internal engine components commonly needed alongside cylinder sleeves, including pistons, piston rings, crankshaft bearings, connecting rod bearings, valves, head gaskets and complete powerhead gasket kits.

Key Features and Benefits

• Advanced Sleeve aftermarket replacement cylinder sleeve
• Part number 1185SC
• Designed for compatible Yamaha inline 4-cylinder four-stroke engines
• 3.310" outside diameter
• 3.118" bore
• 5.195" overall length
• Larger OD option compared with 1185SA
• Can restore cylinders with severe bore damage
• Designed for professional machine-shop installation
• Can be finish-machined for the appropriate rebuild piston
• 1185SA 3.270" OD sleeve linked above
• Yamaha engine rebuild parts by model linked above

FAQ

What engines does Advanced Sleeve 1185SC fit?
It is designed for compatible Yamaha inline 4-cylinder four-stroke engines.

What is the outside diameter of 1185SC?
The 1185SC has a 3.310" outside diameter.

What is the bore size of 1185SC?
The listed bore is 3.118".

How long is the sleeve?
The sleeve is 5.195" long.

What is the difference between 1185SC and 1185SA?
The main difference is outside diameter. 1185SC is 3.310" OD, while 1185SA is 3.270" OD.

Are the bore and length the same on both sleeves?
Yes. Both sleeves are listed with a 3.118" bore and 5.195" length.

How much larger is the 1185SC outside diameter?
The 1185SC is .040" larger in outside diameter than the 1185SA.

How do I know which sleeve I need?
The engine block should be measured by the machine shop performing the repair. Sleeve selection is based on the block condition and required outside diameter, not simply horsepower.

Does the sleeve require machining after installation?
Yes. The installed sleeve must be bored and honed to the required finished size and piston clearance for the rebuild.

Where can I find the pistons, bearings and gaskets for my Yamaha?
Use the Yamaha Engine Rebuild Parts by Model section linked above.

Searchable Terms

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Specifications

Yamaha Inline 4-Cylinder Application

The Advanced Sleeve 1185SA is designed for compatible Yamaha inline 4-cylinder four-stroke powerheads.

Cylinder sleeves are commonly used during a powerhead rebuild when the original cylinder wall is damaged, excessively worn, scored, corroded, or has already been machined beyond an acceptable oversize repair.

Alternate 3.310" OD Cylinder Sleeve

Advanced Sleeve 1185SC - 3.310" Outside Diameter

Alternate replacement sleeve for compatible Yamaha inline four-cylinder four-stroke powerheads.

Outside Diameter: 3.310"
Bore: 3.118"
Length: 5.195"

The 1185SC uses a .040" larger outside diameter than the 1185SA while retaining the same nominal bore and length.

View 1185SC 3.310" OD Sleeve

1185SA vs. 1185SC Cylinder Sleeve

What a Replacement Cylinder Sleeve Does

A cylinder sleeve restores the cylinder wall when the original bore cannot be reused or machined successfully. The damaged original cylinder area is machined to accept the replacement sleeve, and the sleeve is then installed and finished to the required piston bore and clearance.

Sleeving can allow an otherwise damaged engine block to be returned to service when a standard or oversize piston repair is no longer practical.

When a Cylinder Sleeve May Be Needed

• Deep cylinder-wall scoring
• Severe piston or ring damage
• Corrosion or pitting in the cylinder wall
• Previous cylinder machining beyond available piston sizes
• Excessive taper or out-of-round
• Localized cylinder-wall damage
• Restoring a damaged block during a complete powerhead rebuild

Machine Shop Installation

Cylinder sleeve installation requires precision block machining. The block should be measured before selecting the sleeve so the correct outside diameter and required interference fit can be determined.

After installation, the replacement sleeve must be bored and honed to the correct finished dimension for the piston being installed.

Parts to Inspect During a Sleeved Powerhead Rebuild

• Pistons and piston size
• Piston rings
• Cylinder bore and finished piston clearance
• Connecting rod bearings
• Connecting rod bolts
• Crankshaft main bearings
• Crankshaft journals
• Cylinder head sealing surface
• Intake and exhaust valves
• Valve stem seals
• Oil passages and lubrication system
• Powerhead gaskets and seals

Shop Yamaha Engine Rebuild Parts by Model

Need pistons, bearings, rings, valves, gaskets or other components for the same rebuild? Use Pro Marine's Yamaha Engine Rebuild Parts by Model section to locate compatible internal engine components.

Key Features and Benefits

• Advanced Sleeve aftermarket cylinder sleeve
• Part number 1185SA
• Fits compatible Yamaha inline 4-cylinder four-stroke powerheads
• 3.270" outside diameter
• 3.118" bore
• 5.195" length
• Type CS
• Designed for professional cylinder-block machining and installation
• Can restore cylinders that cannot be repaired with a normal overbore
• 1185SC larger 3.310" OD sleeve option linked above
• Yamaha rebuild parts by model linked above

FAQ

What engines does Advanced Sleeve 1185SA fit?
It is designed for compatible Yamaha inline 4-cylinder four-stroke engines. Verify block and sleeve dimensions before ordering.

What is the outside diameter of 1185SA?
The 1185SA has a 3.270" outside diameter.

What is the bore size?
The nominal bore is 3.118".

How long is the sleeve?
The sleeve length is 5.195".

What is the difference between 1185SA and 1185SC?
The key difference is the outside diameter. 1185SA is 3.270" OD, while 1185SC is 3.310" OD. Both list a 3.118" bore and 5.195" length.

Can I install a cylinder sleeve myself?
Cylinder sleeve installation requires precision machining of the engine block and final boring/honing of the installed sleeve. This work is normally performed by an experienced marine machine shop.

Does the sleeve come finished and ready for the piston?
The installed sleeve must be checked and machined to the required finished bore and piston-to-wall clearance for the piston being used.

Where can I find other Yamaha engine rebuild parts?
Use the Yamaha Engine Rebuild Parts by Model section linked above.

Searchable Terms

1185SA, Advanced Sleeve 1185SA, Yamaha cylinder sleeve, Yamaha inline 4 cylinder sleeve, Yamaha inline four cylinder sleeve, Yamaha 4 stroke cylinder sleeve, Yamaha outboard cylinder sleeve, Yamaha powerhead sleeve, Yamaha engine sleeve, 3.270 cylinder sleeve, 3.270 OD sleeve, 3.118 bore sleeve, 5.195 cylinder sleeve, Advanced Sleeve Yamaha, Yamaha F75 cylinder sleeve, Yamaha F80 cylinder sleeve, Yamaha F90 cylinder sleeve, Yamaha F100 cylinder sleeve, Yamaha F115 cylinder sleeve, Yamaha inline 4 engine rebuild, Yamaha powerhead rebuild, 1185SC, 3.310 OD sleeve, Yamaha rebuild parts, Yamaha engine rebuild parts by model

Compatible Applications

OEM & Cross Reference Numbers

Matching Rod Bearing Sets

These rod bearing sets are commonly used with the main bearing set depending on which Yamaha F75-F115 model you are rebuilding.

Pro Marine F75SSROD Rod Bearing Set

Matching Pro Marine rod bearing set for Yamaha 4-stroke F75-F100 rebuilds.

View F75SSROD Rod Bearing Set

Pro Marine 4CYLSSROD Rod Bearing Set

Matching Pro Marine rod bearing set for Yamaha 4-stroke F115 rebuilds.

View 4CYLSSROD Rod Bearing Set

Required Yamaha FC-W 20W40 Engine Oil

This is not optional: Pro Marine requires Yamaha FC-W 20W40 engine oil when using these Yamaha 4-stroke main and rod bearings.

Yamaha FC-W 20W40 Engine Oil - Gallon

Required Yamaha FC-W 20W40 engine oil for use with these Pro Marine Yamaha 4-stroke bearings.

View Yamaha FC-W 20W40 Gallon

Yamaha FC-W 20W40 Engine Oil - Quart

Quart-size Yamaha FC-W 20W40 oil for topping off, break-in service, or ordering the exact amount needed for your rebuild.

View Yamaha FC-W 20W40 Quart

Popular Yamaha F75-F115 Rebuild Parts

Customers rebuilding Yamaha F75-F115 4-stroke powerheads often replace related piston, ring, valve, gasket, and rod bolt components during the same repair.

Vertex Standard Piston Kit

Standard-size piston kit for Yamaha F75-F115 rebuild work.

View Standard Piston Kit

Vertex .010 Oversize Piston Kit

.010 oversize piston kit for machined-cylinder rebuilds.

View .010 Oversize Piston Kit

Vertex .020 Oversize Piston Kit

.020 oversize piston kit for larger-bore rebuild applications.

View .020 Oversize Piston Kit

STD OEM Ring Kit

Standard-size OEM piston ring kit for Yamaha rebuild service.

View STD OEM Ring Kit

.010 Oversize OEM Ring Kit

OEM .25mm / .010 oversize ring kit for oversize piston rebuilds.

View .010 Oversize OEM Ring Kit

Rod Bolt

Replacement connecting rod bolt for Yamaha F75-F115 rebuild work.

View Rod Bolt

Intake Valve

Replacement intake valve, 96.9mm length and 29mm head diameter.

View Intake Valve

Intake Valve Seal

Replacement intake valve seal for Yamaha 4-stroke rebuild service.

View Intake Valve Seal

Exhaust Valve

Replacement exhaust valve, 99.3mm length and 23.9mm head diameter.

View Exhaust Valve

Exhaust Valve Seal

Replacement exhaust valve seal for Yamaha 4-stroke rebuild service.

View Exhaust Valve Seal

Valve Spring

Replacement valve spring for Yamaha F75-F115 cylinder head service.

View Valve Spring

Cylinder Head Gasket

Replacement head gasket for Yamaha F75-F115 powerhead service.

View Head Gasket

Powerhead Gasket Kit

Powerhead gasket kit for Yamaha F75-F115 rebuild and reassembly work.

View Powerhead Gasket Kit

What This Part is Used For

Main bearings support the crankshaft inside the Yamaha 4-stroke powerhead. During a rebuild, worn or damaged main bearings should be replaced to help restore proper crankshaft support, oil clearance, and long-term engine reliability.

This Pro Marine bearing set is designed to make Yamaha F75-F115 rebuilds more straightforward by removing the need to match Yamaha bearing color codes or measure each location with Plastigauge.

Key Features and Benefits

• Complete Pro Marine main bearing set
• Fits Yamaha 4-stroke F75-F115 applications using the listed OEM numbers
• One-size-fits-all bearing set for the F75-F115 range
• No Yamaha bearing color-code selection required
• No Plastigauge needed
• Designed to simplify Yamaha 4-stroke powerhead rebuilds
• Matching rod bearing sets linked above for F75-F100 and F115 models
• Must be used with Yamaha FC-W 20W40 engine oil

FAQ

What engines does this main bearing set fit?
This set is for Yamaha 4-stroke F75-F115 applications using the listed OEM main bearing numbers.

Do I need to select Yamaha bearing color codes?
No. These Pro Marine Yamaha 4-stroke bearings are one-size-fit-all in the F75-F115 range.

Do I need Plastigauge?
No. Pro Marine notes that Plastigauge is not needed when using these bearings.

What oil must be used with these bearings?
You must use Yamaha FC-W 20W40 engine oil. Links to the gallon and quart are included above.

Which rod bearing set goes with this main bearing set?
Use F75SSROD for Yamaha F75-F100 applications and 4CYLSSROD for Yamaha F115 applications.

Should I verify my OEM numbers?
Yes. Always verify your Yamaha model, serial number, and OEM bearing numbers before ordering internal engine components.

Searchable Terms

4CYLSSMAIN, Yamaha F75 main bearing set, Yamaha F90 main bearing set, Yamaha F100 main bearing set, Yamaha F115 main bearing set, Yamaha 4 stroke main bearings, Pro Marine Yamaha bearings, Yamaha no color code bearings, Yamaha no Plastigauge bearings, 6D8-11416-00-00, 6D8-11416-10-00, 6D8-11416-20-00, 6D8-11417-00-00, 6D8-11417-10-00, 6D8-11417-20-00, 6D8-11417-30-00, 6D8-11418-00-00, 6D8-11418-10-00, 6D8-11418-20-00, 6EK-11416-00-00, 6EK-11416-10-00, 6EK-11416-20-00, 6EK-11416-30-00, 6EK-11416-40-00, 6EK-11417-00-00, 6EK-11417-10-00, 6EK-11417-20-00, 6EK-11417-30-00, 6EK-11417-40-00, 67F-11416-00-00, 67F-11416-10-00, 67F-11416-20-00, 67F-11417-00-00, 67F-11417-10-00, 67F-11417-20-00, 67F-11417-30-00, 67F-11418-00-00, 67F-11418-10-00, 67F-11418-20-00, F75SSROD, 4CYLSSROD, FC2040, FC2040-QT, Yamaha FC-W 20W40 oil

OEM & Cross Reference Numbers

Ring Size

Compatible Engine Family

This oversize ring set is intended for the same Yamaha / Mercury engine family as the standard 11605 piston rings, when those engines have been correctly machined for the matching .25mm oversize piston.

Piston Options for This Engine Family

Vertex .010 Oversize Piston - 24228025

Size: .010 / .25mm Oversize

This is the piston size that matches the 11606 Yamaha OEM oversize ring configuration.

First OEM Reference: 60C-W1164-10-00

View Vertex .010 Oversize Piston

Vertex Standard Piston - 24228STD

Size: 79mm Standard

Use standard-size rings with this piston, not the 11606 oversize set.

View Vertex Standard Piston

Vertex .020 Oversize Piston - 24228050

Size: .020 / .50mm Oversize

This larger piston requires the ring package specified for the .020 oversize piston.

View Vertex .020 Piston

Wiseco Standard Piston - 3207PS

Size: 79mm Standard

Alternate standard-size piston for compatible Yamaha / Mercury four-stroke applications.

View Wiseco Standard Piston

Wiseco .020 Oversize Piston - 3207P2

Size: 79.5mm / .020 Oversize

Use the ring package specified for the Wiseco .020 piston rather than this .25mm Yamaha ring set.

View Wiseco .020 Piston

Need Standard-Size Rings?

Yamaha OEM Standard Piston Ring Kit - 11605

Use the 11605 standard ring kit when the engine is retaining a standard-size 79mm piston and standard finished bore.

OEM Numbers: 6D8-11603-00-00, 6D8-11603-01-00, 6D8-11603-10-00, 6D8-11603-11-00, 67F-11603-00-00, 67F-11603-01-00, 804107T1, 880897T02, 880897T1

View Standard Yamaha OEM Rings

Replacement Cylinder Sleeves

Advanced Sleeve 1185SA

OD: 3.270"
Bore: 3.118"
Length: 5.195"

Replacement sleeve option when cylinder damage cannot be corrected with a normal oversize bore.

View 1185SA Sleeve

Advanced Sleeve 1185SC

OD: 3.310"
Bore: 3.118"
Length: 5.195"

Larger-OD replacement sleeve option for compatible Yamaha inline four-cylinder block repairs.

View 1185SC Sleeve

Main & Connecting Rod Bearings

Pro Marine Main Bearing Set - 4CYLSSMAIN

One-size crankshaft main bearing set for compatible Yamaha inline four-cylinder engines.

First OEM Reference: 6D8-11416-00-00

View Main Bearing Set

Pro Marine F115 Rod Bearing Set - 4CYLSSROD

One-size connecting rod bearing set for compatible Yamaha F115 applications.

First OEM Reference: 68V-11656-00-00

View F115 Rod Bearing Set

Complete Powerhead Gasket Kit

Pro Marine Powerhead Gasket Kit - 6803

Complete gasket kit for compatible Yamaha inline four-cylinder powerhead rebuilds.

Recommended when the engine is disassembled for piston, ring, cylinder, bearing or crankshaft service.

View Powerhead Gasket Kit

Standard vs. Oversize Ring Selection

What Piston Rings Do

Piston rings seal combustion pressure between the piston and cylinder wall, control the amount of engine oil remaining on the cylinder surface, and help transfer piston heat into the cylinder.

Ring size must match the piston and finished cylinder bore. Incorrect ring sizing can prevent proper ring end gap and cylinder sealing.

Check Ring End Gap During Assembly

Always check piston ring end gap in the cylinder during assembly. Ring end gap requirements can vary by engine, piston manufacturer, piston size and intended application.

Follow the appropriate Yamaha, Mercury or piston manufacturer's rebuilding specification for the engine being assembled.

Shop Yamaha Engine Rebuild Parts by Model

Find pistons, rings, bearings, valves, cylinder sleeves, gaskets and related powerhead components in Pro Marine's Yamaha Engine Rebuild Parts by Model section.

Shop Yamaha Engine Rebuild Parts by Model

Key Features and Benefits

• Genuine Yamaha OEM piston ring kit
• Pro Marine item 11606
• .25mm / approximately .010 oversize
• For compatible Yamaha / Mercury 79mm piston-family engines
• Designed for use with the corresponding oversize piston
• Vertex .010 piston linked above
• Standard and .020 piston options linked above
• Standard Yamaha OEM ring kit linked above
• Replacement cylinder sleeves linked above
• Main and rod bearing sets linked above
• Complete powerhead gasket kit linked above

FAQ

Is Yamaha 11606 a standard-size ring set?
No. It is a .25mm / approximately .010 oversize piston ring kit.

What OEM number does 11606 replace?
The primary Yamaha OEM reference is 6D8-11604-00-00.

What piston goes with these rings?
The Vertex 24228025 .010 / .25mm oversize piston is linked above as the corresponding oversize piston option.

Can these rings be used with a standard piston?
No. Use the 11605 standard Yamaha OEM ring kit with compatible standard-size 79mm pistons.

Can these rings be used with a .020 piston?
No. Use the ring package specified for the exact .020 oversize piston.

Do you stock standard-size pistons?
Yes. Pro Marine stocks the Vertex 24228STD and Wiseco 3207PS standard 79mm piston options.

Do you stock .020 pistons?
Yes. The Vertex 24228050 and Wiseco 3207P2 .020 oversize options are linked above.

Are replacement cylinder sleeves available?
Yes. Advanced Sleeve 1185SA and 1185SC are linked above.

Are main and rod bearings available?
Yes. Pro Marine 4CYLSSMAIN and 4CYLSSROD bearing sets are linked above for compatible applications.

Is a complete gasket kit available?
Yes. The Pro Marine 6803 Powerhead Gasket Kit is linked above.

Searchable Terms

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OEM & Cross Reference Numbers

Yamaha Outboard Fitment

Yamaha used this standard piston ring family across several generations of inline four-cylinder four-stroke engines.

Mercury Outboard Fitment

Compatible Piston Options

Pro Marine stocks both Vertex and Wiseco pistons for this engine family. Always match the piston and ring size to the finished cylinder bore.

Vertex Standard Piston - 24228STD

Size: 79.00mm Standard

Standard-size Vertex piston option for compatible Yamaha and Mercury four-stroke engines.

First OEM: 68V-W1164-02-00

View Vertex Standard Piston

Wiseco Standard Piston - 3207PS

Size: 79.00mm Standard

Wiseco standard-size piston for compatible Yamaha F115 and Mercury 115 EFI applications.

OEM Family: 60C-W1164 / 68V-W1164 / 880895

View Wiseco Standard Piston

Vertex .010 Oversize Piston - 24228025

Size: .010 / .25mm Oversize

Requires the matching oversize ring configuration and a cylinder correctly machined for the .25mm oversize piston.

View Vertex .010 Piston

Vertex .020 Oversize Piston - 24228050

Size: .020 / .50mm Oversize

Oversize piston option for cylinders machined beyond the standard 79mm bore.

View Vertex .020 Piston

Wiseco .020 Oversize Piston - 3207P2

Size: 79.5mm / .020 Oversize

Wiseco oversize piston option for cylinders properly machined to the required finished bore.

View Wiseco .020 Piston

Need .010 Oversize Rings?

Yamaha OEM .25mm Oversize Piston Ring Kit - 11606

Yamaha OEM oversize piston ring set for the corresponding .25mm / approximately .010 oversize piston application.

First OEM: 6D8-11604-00-00

Use this option instead of 11605 when the engine has been correctly machined for the matching .25mm oversize piston.

View .25mm Oversize OEM Rings

Replacement Cylinder Sleeves

Advanced Sleeve 1185SA

OD: 3.270"
Bore: 3.118"
Length: 5.195"

Replacement cylinder sleeve for compatible Yamaha inline four-cylinder four-stroke rebuilds.

View 1185SA Sleeve

Advanced Sleeve 1185SC

OD: 3.310"
Bore: 3.118"
Length: 5.195"

Larger outside-diameter sleeve option for compatible engine block repairs.

View 1185SC Sleeve

Main & Connecting Rod Bearings

Pro Marine Main Bearing Set - 4CYLSSMAIN

Complete one-size crankshaft main bearing set for compatible Yamaha inline four-cylinder engines.

First OEM Reference: 6D8-11416-00-00

No Yamaha color-code bearing selection or Plastigauge sizing required.

View Main Bearing Set

Pro Marine F115 Rod Bearing Set - 4CYLSSROD

Complete one-size connecting rod bearing set for compatible Yamaha F115 four-stroke applications.

First OEM Reference: 68V-11656-00-00

View F115 Rod Bearing Set

Pro Marine F75-F100 Rod Bearing Set - F75SSROD

Connecting rod bearing set for compatible Yamaha F75, F80, F90 and F100 engine families.

View F75-F100 Rod Bearing Set

Complete Powerhead Gasket Kit

Pro Marine Powerhead Gasket Kit - 6803

Complete gasket kit for compatible Yamaha F75-F115 powerhead rebuilding applications.

Recommended when the engine is being disassembled for piston, ring, cylinder, crankshaft or bearing service.

OEM Families: 6D8-W0001, 67F-W0001 and 68V-W0001

View Powerhead Gasket Kit

What is Included

This listing is for a Yamaha OEM standard-size piston ring kit. Piston rings are sized for one piston. Verify the quantity required for your complete engine rebuild before ordering.

What Piston Rings Do

Piston rings seal the space between the piston and cylinder wall while allowing the piston to move freely through the cylinder.

The ring package helps contain combustion pressure, control engine oil on the cylinder wall and transfer heat from the piston into the cylinder.

Standard Rings or Oversize Rings?

Check Ring End Gap During Assembly

Piston ring end gap should be checked in the cylinder during engine assembly. Ring specifications can vary based on piston manufacturer, bore size and engine application.

Follow the Yamaha, Mercury, Wiseco or Vertex specifications applicable to the piston and engine being assembled.

Shop Yamaha Engine Rebuild Parts by Model

Need the rest of the engine components? Pro Marine organizes pistons, rings, bearings, valves, cylinder sleeves, gaskets and other internal components by Yamaha engine family.

Key Features and Benefits

• Genuine Yamaha OEM piston ring kit
• Standard-size piston ring set
• Fits compatible 79mm piston applications
• Fits select Yamaha F75 engines
• Fits select Yamaha F80 engines
• Fits select Yamaha F90 engines
• Fits select Yamaha F100 engines
• Fits extensive Yamaha F115 and LF115 applications
• Fits select Mercury 75HP and 90HP carbureted engines
• Fits select Mercury 75-115HP EFI engines
• Cross references Yamaha 6D8-11603 family
• Cross references Yamaha 67F-11603 family
• Cross references Mercury 804107T1 and 880897
• Standard Vertex and Wiseco pistons linked above
• Oversize piston options linked above
• .25mm oversize Yamaha OEM ring kit linked above
• Replacement cylinder sleeves linked above
• Main and rod bearing sets linked above
• Complete powerhead gasket kit linked above

FAQ

Is 11605 a standard-size piston ring kit?
Yes. This is the standard-size Yamaha OEM piston ring kit for compatible 79mm piston applications.

What Yamaha OEM numbers does 11605 replace?
It cross references 6D8-11603-00-00, 6D8-11603-01-00, 6D8-11603-10-00, 6D8-11603-11-00, 67F-11603-00-00 and 67F-11603-01-00.

What Mercury numbers does this ring kit cross reference?
Mercury references include 804107T1, 880897T02 and 880897T1.

Does this fit Yamaha F115?
Yes. The supplied fitment includes extensive F115 and LF115 applications from early engines through later model families.

Does it fit Yamaha F75 and F90?
Yes. The supplied application information includes select F75 and F90 engines.

Does this fit Yamaha F80 and F100?
Yes. Select F80 and F100 applications from approximately 1999-2003 are included in the supplied fitment.

Does this fit Mercury 115 EFI?
Yes. Supplied Mercury fitment includes 0T178500 thru 0T800999, 0T801000 thru 1B226999, and 1B227000 thru 1B366822.

Does it fit other Mercury horsepower models?
Yes. Supplied fitment also includes select Mercury 75HP, 80HP, 90HP and 100HP applications.

What standard pistons can I use?
Pro Marine stocks the Vertex 24228STD and Wiseco 3207PS standard 79mm piston options linked above.

Do you stock oversize piston rings?
Yes. The 11606 Yamaha OEM .25mm / approximately .010 oversize ring kit is linked above.

Do you stock oversize pistons?
Yes. Vertex .010 and .020 pistons and a Wiseco .020 piston are linked above.

Do you have cylinder sleeves?
Yes. Advanced Sleeve 1185SA and 1185SC are linked above.

Are crankshaft and rod bearings available?
Yes. Pro Marine 4CYLSSMAIN, F75SSROD and 4CYLSSROD bearing sets are linked above for compatible applications.

Is a complete powerhead gasket kit available?
Yes. The Pro Marine 6803 Powerhead Gasket Kit is linked above.

Searchable Terms

11605, Yamaha 11605, Yamaha piston rings, Yamaha standard piston rings, Yamaha 79mm piston rings, Yamaha F75 piston rings, Yamaha F80 piston rings, Yamaha F90 piston rings, Yamaha F100 piston rings, Yamaha F115 piston rings, Yamaha LF115 piston rings, Mercury 75 piston rings, Mercury 90 piston rings, Mercury 115 EFI piston rings, Mercury 115 four stroke rings, 6D8-11603-00-00, 6D8-11603-01-00, 6D8-11603-10-00, 6D8-11603-11-00, 67F-11603-00-00, 67F-11603-01-00, 804107T1, 880897T02, 880897T1, Yamaha 6D8-11603, Yamaha 67F-11603, Mercury 880897, 24228STD, Vertex F115 piston, 3207PS, Wiseco F115 piston, 24228025, Vertex .010 piston, 24228050, Vertex .020 piston, 3207P2, Wiseco .020 piston, 11606, Yamaha oversize piston rings, 1185SA, 1185SC, Yamaha cylinder sleeve, 4CYLSSMAIN, F75SSROD, 4CYLSSROD, 6803, Yamaha powerhead gasket kit, Yamaha engine rebuild parts

OEM & Cross Reference Numbers

Yamaha Outboard Fitment

Yamaha used this powerhead gasket-set family across several engine generations. The supplied fitment includes both four-stroke and conventional two-stroke applications.

Representative Yamaha Model-Year Coverage

Mercury 75HP & 90HP Carbureted Fitment

Mercury catalog information supplied for this gasket-set family identifies the following 75HP and 90HP carbureted outboard applications.

What is Included

The 6803 Powerhead Gasket Kit is intended to provide the major gaskets and seals required during compatible powerhead disassembly and reassembly.

Exact contents should be compared with the product image and the parts required for your specific engine before beginning the rebuild.

What This Kit is Used For

A powerhead gasket kit is used when rebuilding or extensively servicing the engine powerhead. Removing cylinder heads, crankcases and other major engine components normally requires replacement of the disturbed gaskets and sealing components before the engine is reassembled.

Using a complete gasket kit helps keep the major sealing parts for the rebuild together rather than purchasing each gasket individually.

Common Uses for a Powerhead Gasket Kit

• Complete powerhead rebuild
• Crankshaft and connecting rod repair
• Piston and cylinder repair
• Cylinder-head removal and overhaul
• Crankcase disassembly
• Major internal engine repairs
• Replacement of aged or damaged engine sealing components

Parts to Inspect During a Powerhead Rebuild

• Pistons and piston rings
• Connecting rod bearings
• Connecting rod bolts
• Crankshaft main bearings
• Crankshaft journals
• Cylinder bores
• Intake and exhaust valves on four-stroke models
• Valve stem seals and valve springs
• Oil pump and lubrication passages
• Cooling passages and thermostats

Key Features and Benefits

• Pro Marine powerhead gasket kit
• Pro Marine part number 6803
• Fits select Yamaha F75 four-strokes
• Fits select Yamaha F80 four-strokes
• Fits select Yamaha F90 four-strokes
• Fits select Yamaha F100 four-strokes
• Fits extensive Yamaha F115 / LF115 applications
• Fits select Yamaha 115HP and 130HP applications
• Fits select Mercury 75HP carbureted outboards
• Fits select Mercury 90HP carbureted outboards
• Replaces multiple 6D8-W0001 gasket-set numbers
• Replaces multiple 67F-W0001 gasket-set numbers
• Replaces multiple 68V-W0001 gasket-set numbers
• Cross references Mercury 804345A1 / A2 / A02

FAQ

What engines does Pro Marine 6803 fit?
Verified applications include select Yamaha F75, F80, F90, F100 and F115 four-strokes, select Yamaha 115HP / 130HP engines and select Mercury 75HP and 90HP carbureted outboards.

Does 6803 fit Yamaha F75?
Yes. Verified applications include F75TLRB, F75TLRC, F75TLRD, later F75TLR applications and select F75LA models.

Does it fit Yamaha F90?
Yes. The supplied fitment includes numerous F90 TJR, TLR, TXR, JA, LA and XA configurations.

Does it fit Yamaha F100?
Yes. Verified applications include several F100TLR and F100TXR models from 1999 through 2003.

Does 6803 fit Yamaha F115?
Yes. The supplied fitment includes extensive F115 and LF115 applications from early 2000 model families through later engines.

Does this gasket kit fit Yamaha 115HP 2-stroke engines?
Yes. The supplied application list includes select 115TLR and 115TXR engines from 2002 through later model families.

Does it fit Yamaha 130HP?
Yes. Verified models include 130TLRA/B/C and 130TXRA/B/C.

Does this fit Mercury 75HP?
Yes. Mercury application data shows compatible 75HP carbureted engines from 0G960500 thru 1B226999, divided between the two catalog serial ranges shown above.

Does it fit Mercury 90HP?
Yes. Mercury 90HP carbureted applications are shown for 0G960500 thru 0T800999 and 0T801000 thru 1B226999.

What Yamaha OEM gasket sets does 6803 replace?
It cross references multiple numbers in the 6D8-W0001, 6N6-W0001, 67F-W0001 and 68V-W0001 families listed above.

What Mercury numbers does it replace?
Mercury references include 804345A1, 804345A2 and 804345A02.

Should I order this kit only by horsepower?
No. Always verify the complete Yamaha model number or Mercury serial number because multiple gasket kits can be used within similar horsepower families.

Searchable Terms

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Piston Size & Application

OEM & Cross Reference Piston Family

Yamaha Outboard Fitment

Mercury 115HP EFI Fitment

Standard Wiseco Piston Option

Wiseco Standard Piston Kit - 79mm - 3207PS

Use the 3207PS standard 79.00mm piston when the cylinder remains within standard-size service limits.

OEM Family: 60C-W1164, 68V-W1164 and Mercury 880895

View Standard Wiseco Piston

Vertex Piston Options

Pro Marine also stocks Vertex piston kits in standard, .010 oversize and .020 oversize for compatible applications.

Vertex Standard Piston - 24228STD

Size: Standard / 79.00mm

First OEM: 68V-W1164-02-00

View Vertex Standard Piston

Vertex .010 Oversize Piston - 24228025

Size: +.010 / .25mm Oversize

First OEM Reference: 60C-W1164-10-00

View Vertex .010 Piston

Vertex .020 Oversize Piston - 24228050

Size: +.020 Oversize

Alternate .020 oversize piston option for compatible engine rebuilds.

View Vertex .020 Piston

Yamaha OEM Piston Ring Options

Yamaha OEM Standard Ring Kit - 11605

Size: Standard 79mm

First OEM: 6D8-11603-00-00

View Standard OEM Rings

Yamaha OEM .25mm Oversize Ring Kit - 11606

Size: .25mm / approximately .010 oversize

First OEM: 6D8-11604-00-00

View .25mm OEM Rings

Replacement Cylinder Sleeves

If the cylinder is damaged beyond a normal oversize-bore repair, Pro Marine stocks replacement Advanced Sleeve options.

Advanced Sleeve 1185SC

Straight 4-stroke cylinder sleeve for compatible powerhead rebuilding.

Verify outside diameter, length and machining requirements before installation.

View 1185SC Sleeve

Advanced Sleeve 1185SA

Alternate straight 4-stroke cylinder sleeve for compatible engine rebuilding.

Compare sleeve dimensions to the block before machining.

View 1185SA Sleeve

Main & Connecting Rod Bearings

Pro Marine Main Bearing Set - 4CYLSSMAIN

Complete one-size crankshaft main bearing set for compatible Yamaha four-cylinder engines.

First OEM Reference: 6D8-11416-00-00

No Yamaha bearing color-code selection or Plastigauge sizing required.

View Main Bearing Set

Pro Marine F115 Rod Bearing Set - 4CYLSSROD

One-size connecting rod bearing set for compatible Yamaha F115 four-stroke applications.

First OEM Reference: 68V-11656-00-00

Designed to eliminate Yamaha factory bearing color selection.

View Rod Bearing Set

Complete Powerhead Gasket Kit

Pro Marine Powerhead Gasket Kit - 6803

Complete powerhead gasket kit for compatible Yamaha F75-F115 engine rebuilds.

Recommended when the engine is disassembled for cylinder machining, piston replacement, bearing service or other major internal repairs.

OEM Families: 6D8-W0001, 67F-W0001 and 68V-W0001

View Powerhead Gasket Kit

Piston Size Guide

Shop Yamaha Engine Rebuild Parts by Model

Use Pro Marine's Yamaha Engine Rebuild Parts by Model section to find additional pistons, bearings, rings, valves, gaskets, sleeves and other internal engine parts.

When to Use an Oversize Piston

An oversize piston is used when cylinder wear, taper, scoring or damage requires the cylinder to be machined larger than the original standard bore.

The cylinder should first be accurately measured to determine whether it can remain standard, be bored .010 or .020 oversize, or requires installation of a replacement cylinder sleeve.

Parts to Inspect During an Oversize Piston Rebuild

• Cylinder bore diameter
• Cylinder taper and out-of-round
• Finished piston-to-wall clearance
• Piston rings and ring end gap
• Connecting rod condition
• Connecting rod bolts
• Connecting rod bearings
• Crankshaft main bearings
• Crankshaft journals
• Cylinder head and valves
• Valve stem seals
• Oil passages and lubrication system
• Powerhead gaskets and seals

Key Features and Benefits

• Wiseco aftermarket piston kit
• Wiseco part number 3207P2
• .020 oversize / 79.5mm
• Fits extensive Yamaha F115 and LF115 applications
• Fits select Yamaha F75 and F90 applications
• Fits select Mercury 115HP EFI applications
• Standard Wiseco piston linked above
• Vertex standard, .010 and .020 piston options linked above
• Yamaha OEM standard and .25mm oversize ring options linked above
• Replacement cylinder sleeves linked above
• Main and connecting rod bearing sets linked above
• Complete powerhead gasket kit linked above

FAQ

What size is Wiseco 3207P2?
It is a .020 oversize / 79.5mm piston.

Is this the standard-size piston?
No. The standard Wiseco piston is the 3207PS 79.00mm piston linked above.

Can I install 3207P2 in a standard cylinder?
No. The cylinder must be properly bored and finished for the 79.5mm oversize piston.

Does this fit Yamaha F115?
Yes. The supplied application information includes extensive F115 and LF115 fitment, but the cylinder must be machined for this oversize piston.

Does this fit Mercury 115 EFI?
Yes. Supplied fitment includes 0T178500 thru 0T800999, 0T801000 thru 1B226999, and 1B227000 thru 1B366822.

Do you have a .010 oversize piston?
Yes. The Vertex 24228025 .010 oversize piston is linked above.

Do you have another .020 piston option?
Yes. The Vertex 24228050 .020 piston is also linked above.

Do you have replacement cylinder sleeves?
Yes. Advanced Sleeve 1185SA and 1185SC options are linked above.

What main bearings go with this engine?
The Pro Marine 4CYLSSMAIN main bearing set is linked above.

What connecting rod bearings are available?
The Pro Marine 4CYLSSROD rod bearing set is linked above.

Is a complete gasket kit available?
Yes. The Pro Marine 6803 Powerhead Gasket Kit is linked above.

Searchable Terms

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OEM & Cross Reference Numbers

Yamaha Outboard Fitment

Mercury 115HP EFI Fitment

Piston Options for This Engine Family

Pro Marine stocks both Wiseco and Vertex piston options for compatible Yamaha and Mercury four-stroke rebuilds. Select piston size only after measuring the cylinders and determining the required finished bore.

Wiseco .020 Oversize Piston - 3207P2

Size: 79.5mm / .020 Oversize

Oversize Wiseco option for a cylinder correctly machined for the 79.5mm piston.

OEM Family: 60C-W1164 / 68V-W1164

View Wiseco .020 Piston

Vertex Standard Piston Kit - 24228STD

Size: Standard / 79mm

Alternate standard-size piston option for compatible Yamaha F90-F115 four-stroke engines.

First OEM: 68V-W1164-02-00

View Vertex Standard Piston

Vertex .010 Oversize Piston - 24228025

Size: +.010 / .25mm Oversize

Intermediate oversize piston option when the cylinder can be correctly finished at .010 oversize.

First OEM Reference: 60C-W1164-10-00

View Vertex .010 Piston

Vertex .020 Oversize Piston - 24228050

Size: +.020 Oversize

Vertex oversize piston option for compatible Yamaha F90-F115 four-stroke engine rebuilds.

OEM Family: 60C-W1164 / 68V-W1164

View Vertex .020 Piston

Yamaha OEM Piston Ring Options

Yamaha OEM Standard Piston Ring Kit - 11605

Bore: 79.00mm Standard

First OEM: 6D8-11603-00-00

OEM standard-size ring option for compatible 79mm Yamaha 115HP four-stroke piston applications.

View Standard OEM Rings

Yamaha OEM .25mm Oversize Ring Kit - 11606

Size: .25mm / approximately .010 Oversize

First OEM: 6D8-11604-00-00

OEM oversize ring option for the corresponding Yamaha .25mm oversize piston configuration.

View .25mm OEM Rings

Replacement Cylinder Sleeves

If a cylinder is too damaged for a normal overbore repair, Pro Marine stocks replacement Advanced Sleeve options for compatible four-stroke engine rebuilding.

Advanced Sleeve 1185SC

Straight replacement 4-stroke cylinder sleeve for compatible powerhead rebuilding applications.

Verify sleeve dimensions and machining requirements before installation.

View 1185SC Sleeve

Advanced Sleeve 1185SA

Alternate straight 4-stroke cylinder sleeve option for compatible Yamaha / Mercury powerhead rebuilding.

Compare sleeve dimensions with the block before machining.

View 1185SA Sleeve

Crankshaft Main & Connecting Rod Bearings

When rebuilding the complete Yamaha F115 powerhead, inspect the crankshaft main and connecting rod bearings at the same time as the pistons.

Pro Marine Yamaha Main Bearing Set - 4CYLSSMAIN

One-size crankshaft main bearing set for compatible Yamaha four-cylinder four-stroke applications.

First OEM Reference: 6D8-11416-00-00

No Yamaha bearing color-code selection or Plastigauge sizing required.

View Main Bearing Set

Pro Marine Yamaha F115 Rod Bearing Set - 4CYLSSROD

Complete one-size connecting rod bearing set for compatible Yamaha F115 four-stroke engines.

First OEM Reference: 68V-11656-00-00

Designed to eliminate Yamaha bearing color-code selection and Plastigauge sizing.

View Rod Bearing Set

Complete Powerhead Gasket Kit

Pro Marine Powerhead Gasket Kit - 6803

Complete powerhead gasket kit for compatible Yamaha F75-F115 engine rebuilds.

A useful option when the engine is being completely disassembled for piston replacement, cylinder machining, bearing service or other major internal repairs.

OEM Families: 6D8-W0001, 67F-W0001 and 68V-W0001

View Powerhead Gasket Kit

Choosing the Correct Piston Size

Shop Yamaha Engine Rebuild Parts by Model

Looking for the rest of the internal engine components? Use the Pro Marine Yamaha Engine Rebuild Parts by Model section to find pistons, rings, bearings, valves, gaskets, sleeves and related powerhead parts.

What This Piston is Used For

The piston transfers combustion force through the connecting rod to the crankshaft while the piston rings seal combustion pressure and control oil on the cylinder wall.

During a powerhead rebuild, piston size should be selected only after the cylinders have been accurately measured for diameter, taper and out-of-round condition.

Parts to Inspect During a Piston Replacement

• Cylinder bore diameter, taper and roundness
• Piston-to-cylinder-wall clearance
• Piston rings and ring end gap
• Connecting rods and rod bolts
• Connecting rod bearings
• Crankshaft main bearings
• Crankshaft journals
• Cylinder head sealing surface
• Intake and exhaust valves
• Valve stem seals
• Oil passages and lubrication system
• Powerhead gaskets and seals

Key Features and Benefits

• Wiseco aftermarket piston kit
• Wiseco part number 3207PS
• Standard 79.00mm / 3.110" piston size
• Fits extensive Yamaha F115 and LF115 applications
• Fits select Yamaha F75 and F90 applications
• Fits select Mercury 115HP EFI four-stroke engines
• Cross references Yamaha 60C-W1164 piston family
• Cross references Yamaha 68V-W1164 piston family
• Cross references Mercury 880895 piston family
• Wiseco .020 oversize piston available
• Vertex standard, .010 and .020 piston options available
• Yamaha OEM standard and oversize rings linked above
• Replacement cylinder sleeves linked above
• Pro Marine main and rod bearing sets linked above
• Complete powerhead gasket kit linked above

FAQ

What size is Wiseco 3207PS?
The 3207PS is the standard 79.00mm / 3.110" piston.

What Yamaha numbers does 3207PS replace?
It cross references 60C-W1164-00-00, 60C-W1164-01-00, 68V-W1164-00-00, 68V-W1164-01-00 and 68V-W1164-02-00.

What Mercury piston numbers does this cross reference?
Mercury references include 880895A05, 880895A14 and 880895T1.

Does this piston fit Yamaha F115?
Yes. The supplied application data includes extensive F115 TJR, TLR, TXR, JA, LA and XA applications as well as LF115 counter-rotation engines.

Does it fit Mercury 115 EFI?
Yes. Supplied Mercury fitment includes 0T178500 thru 0T800999, 0T801000 thru 1B226999, and 1B227000 thru 1B366822.

Is there a .020 oversize Wiseco piston?
Yes. The Wiseco 3207P2 79.5mm / .020 oversize piston is linked above.

Are Vertex pistons available?
Yes. Pro Marine stocks Vertex standard, .010 oversize and .020 oversize piston options for compatible applications.

Do you have OEM Yamaha rings?
Yes. The 11605 standard 79mm and 11606 .25mm oversize Yamaha OEM ring kits are linked above.

Do you have cylinder sleeves?
Yes. Advanced Sleeve 1185SA and 1185SC options are linked above.

What main bearing set is available?
The Pro Marine 4CYLSSMAIN crankshaft main bearing set is linked above for compatible Yamaha engines.

What rod bearings are available for the F115?
The Pro Marine 4CYLSSROD connecting rod bearing set is linked above.

Is a complete gasket kit available?
Yes. The Pro Marine 6803 Powerhead Gasket Kit is linked above for compatible powerhead rebuilds.

Searchable Terms

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