Engine Rebuild Parts by Model | Yamaha Outboard

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Home > Outboard > Yamaha Outboard > Engine Rebuild Parts by Model | Yamaha Outboard

Shop Yamaha outboard engine rebuild parts by engine model and family. Find pistons, piston rings, bearings, connecting rods, gaskets, cylinder sleeves, valves, and other internal powerhead components for Yamaha outboard repair and rebuild projects.

Select your Yamaha engine family below to narrow the parts to the correct application.

Shop Yamaha Engine Rebuild Parts by Model

Tip: Do not select Yamaha engine rebuild parts by horsepower alone. Confirm the engine family, model code, displacement, serial information, and OEM part number whenever possible.

Common Yamaha Outboard Engine Rebuild Parts

Pistons and piston ring sets
Main and connecting rod bearings
Connecting rods and rod bolts
Powerhead and engine gasket kits
Oil seals and internal engine seals
Cylinder sleeves
Valves, valve seats, and valve springs
Other model-specific internal powerhead components

How to Choose the Correct Yamaha Rebuild Parts

Yamaha outboards with similar horsepower ratings can use different pistons, bearings, gaskets, rods, and other internal components depending on the engine family, displacement, model code, and production range.

Start by selecting the correct engine family above. Then compare your Yamaha model information and OEM part numbers with the individual product listings before ordering.

Yamaha Powerhead Rebuild Information

The exact parts required for a Yamaha powerhead rebuild depend on engine condition and measurements taken during teardown. Cylinder condition, crankshaft journals, bearing clearances, pistons, rings, connecting rods, valves, and sealing surfaces should be inspected before final parts are selected.

If cylinder machining is required, determine whether standard or oversize pistons, rings, or cylinder sleeves are needed before ordering internal engine components.

Frequently Asked Questions

What parts are commonly replaced during a Yamaha outboard rebuild?

Depending on engine condition, a rebuild may require pistons, rings, main bearings, rod bearings, connecting rods, gaskets, seals, cylinder sleeves, valves, and other internal powerhead components.

Can I find Yamaha rebuild parts by horsepower?

Horsepower is a useful starting point, but it should not be the only fitment identifier. Yamaha engines with the same horsepower can use different parts depending on engine family, displacement, model, and production range.

Do you carry OEM and aftermarket Yamaha rebuild parts?

Pro Marine USA carries genuine Yamaha OEM parts along with quality OEM specification aftermarket replacement parts for many Yamaha outboard rebuild applications.

How do I identify the correct Yamaha part number?

Use your Yamaha engine model information with the OEM parts lookup to locate the factory diagram and original part number, then search that number on Pro Marine USA for available replacement options.

Helpful Links

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Yamaha F90 F115 Mercury 115 EFI Vertex .020 Piston 24228050

.50mm Oversize Vertex Piston for Yamaha F115 & Mercury 115 EFI

Vertex Yamaha / Mercury 4-Stroke .020 Oversize Piston Kit

Yamaha F90-F115 & Mercury 115 EFI Vertex .020 Oversize Piston Kit - 24228050

The Vertex 24228050 Piston Kit is a .020 oversize / .50mm oversize piston for select Yamaha four-stroke and Mercury 115HP EFI outboards.

Verified engine families include extensive Yamaha F115 and LF115 applications, select Yamaha F75 and F90 engines, and select Mercury 115HP EFI four-stroke outboards.

This piston is part of the same engine family as Yamaha 60C-W1164 and 68V-W1164 piston assemblies and Mercury 880895 piston assemblies.

IMPORTANT - .020 / .50MM OVERSIZE PISTON

This is NOT a standard-size piston.

The cylinder must be accurately measured and properly machined for the .020 / .50mm oversize piston before installation.

Do not install this piston into a standard 79.00mm bore.

Piston Size & Application

Specification	Details
Brand	Vertex
Part Number	24228050
Piston Size	.020 Oversize
Metric Oversize	.50mm Oversize
Nominal Diameter	79.5mm
Standard Bore Reference	79.00mm

OEM & Cross Reference Piston Family

Brand / Type	Part Number
Vertex	24228050
Yamaha OEM Family	60C-W1164-00-00
Yamaha OEM Family	60C-W1164-01-00
Yamaha OEM Family	68V-W1164-00-00
Yamaha OEM Family	68V-W1164-01-00
Yamaha OEM Family	68V-W1164-02-00
Mercury OEM Family	880895A05
Mercury OEM Family	880895A14
Mercury OEM Family	880895T1

Yamaha Outboard Fitment

Engine Family	Verified Applications
Yamaha F75	F75TLRB - 2003 and F75TLRC - 2004.
Yamaha F90	F90TJRB / F90TLRB - 2003 and F90TJRC / F90TLRC - 2004.
Yamaha F115 - Early Models	F115TLRY / F115TXRY - 2000, F115TLRZ / F115TXRZ - 2001, F115TJRA / F115TLRA / F115TXRA - 2002, F115TJRB / F115TLRB / F115TXRB - 2003, F115TJRC / F115TLRC / F115TXRC - 2004, and F115TJRD / F115TLRD / F115TXRD - 2005.
Yamaha F115 - Later Models	F115JA, F115LA, F115TJR, F115TLR, F115TXR and F115XA, including the supplied 04, 011, 061 and 0405-0411 suffix variants.
Yamaha LF115	LF115TXRY - 2000, LF115TXRZ - 2001, LF115TXRA - 2002, LF115TXRB - 2003, LF115TXRC - 2004, LF115TXRD - 2005, plus later LF115TXR and LF115XA applications.

Mercury 115HP EFI Fitment

Engine	Serial Number Range
Mercury 115HP EFI	0T178500 thru 0T800999
Mercury 115HP EFI	0T801000 thru 1B226999
Mercury 115HP EFI	1B227000 thru 1B366822

Measure the Cylinder Before Ordering

Oversize piston selection should be based on actual cylinder measurements, not only on the condition of the original piston.

Measure bore diameter, taper and out-of-round condition before machining. The cylinder should then be finished to the piston manufacturer's required piston-to-wall clearance.

Other Piston Options

Vertex Standard Piston - 24228STD

Size: 79.00mm Standard

Standard Vertex piston for compatible cylinders that remain within factory bore-size limits.

First OEM: 68V-W1164-02-00

View Vertex Standard Piston

Vertex .010 Oversize Piston - 24228025

Size: .010 / .25mm Oversize

Intermediate oversize Vertex option for cylinders that can be finished at .010 oversize.

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

View Vertex .010 Piston

Wiseco Standard Piston - 3207PS

Size: 79.00mm Standard

Alternate standard-size Wiseco piston for compatible Yamaha F115 and Mercury 115 EFI engine rebuilds.

View Wiseco Standard Piston

Wiseco .020 Oversize Piston - 3207P2

Size: 79.5mm / .020 Oversize

Alternate .020 oversize Wiseco option for cylinders properly machined to the required finished bore.

View Wiseco .020 Piston

Yamaha OEM Piston Ring Options

Yamaha OEM Standard Ring Kit - 11605

Size: Standard 79mm

First OEM: 6D8-11603-00-00

OEM standard ring option for compatible standard-size 79mm pistons.

View Standard OEM Rings

Yamaha OEM .25mm Oversize Ring Kit - 11606

Size: .25mm / approximately .010 Oversize

First OEM: 6D8-11604-00-00

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

View .25mm OEM Rings

Replacement Cylinder Sleeves

If cylinder damage cannot be corrected with a .020 overbore, replacement cylinder sleeves may be required.

Advanced Sleeve 1185SC

Straight 4-stroke cylinder sleeve for compatible engine rebuilding.

Verify sleeve dimensions, block bore and finished cylinder requirements before machining.

View 1185SC Sleeve

Advanced Sleeve 1185SA

Alternate replacement cylinder sleeve option for compatible Yamaha / Mercury four-stroke engine rebuilds.

Compare sleeve dimensions with the block before installation.

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

Eliminates Yamaha bearing color-code selection and Plastigauge sizing.

View Main Bearing Set

Pro Marine F115 Rod Bearing Set - 4CYLSSROD

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

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

Eliminates the factory Yamaha bearing color selection process.

View Rod Bearing Set

Complete Powerhead Gasket Kit

Pro Marine Powerhead Gasket Kit - 6803

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

Recommended when the engine is disassembled for piston replacement, cylinder machining, bearing service or a complete powerhead rebuild.

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

View Powerhead Gasket Kit

Piston Size Guide

Finished Cylinder Size	Piston Options
79.00mm Standard	Vertex 24228STD or Wiseco 3207PS
.010 / .25mm Oversize	Vertex 24228025
.020 / .50mm Oversize	Vertex 24228050 or Wiseco 3207P2
Cylinder Requires Sleeving	Inspect 1185SA / 1185SC replacement sleeve options and machine the finished cylinder to suit the selected piston.

Shop Yamaha Engine Rebuild Parts by Model

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

Shop Yamaha Engine Rebuild Parts by Model

When to Use a .020 Oversize Piston

A .020 oversize piston is used when cylinder wear, scoring or damage requires enough machining that the cylinder can no longer remain at standard size or .010 oversize.

Before machining, accurately measure cylinder diameter, taper and out-of-round. The finished bore must provide the correct piston-to-wall clearance for the Vertex piston.

When Should a Cylinder be Sleeved Instead?

If cylinder damage, corrosion or previous machining prevents the bore from being restored at .020 oversize, a replacement cylinder sleeve may be required.

The replacement sleeve is installed and then finished to the correct bore for whichever piston size will be used in the rebuilt engine.

Parts to Inspect During a Powerhead Rebuild

Cylinder bore diameter
Cylinder taper and out-of-round
Piston-to-wall clearance
Piston rings and ring end gap
Connecting rods
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

Vertex oversize piston kit
Vertex part number 24228050
.020 / .50mm oversize
79.5mm nominal piston size
Fits extensive Yamaha F115 and LF115 applications
Fits select Yamaha F75 and F90 applications
Fits select Mercury 115HP EFI engines
Vertex standard piston linked above
Vertex .010 oversize piston linked above
Wiseco standard and .020 piston alternatives linked above
Yamaha OEM 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 Vertex 24228050?
It is a .020 / .50mm oversize piston, approximately 79.5mm.

Is 24228050 a standard-size piston?
No. The standard Vertex piston is the 24228STD 79.00mm piston linked above.

Can I install this piston in a standard cylinder?
No. The cylinder must be properly bored and finished for the .020 oversize piston.

Does this fit Yamaha F115?
Yes. The supplied engine fitment includes extensive Yamaha F115 and LF115 applications.

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

Do you have a .010 oversize piston?
Yes. The Vertex 24228025 is the .010 / .25mm oversize option.

Do you have another .020 piston option?
Yes. The Wiseco 3207P2 79.5mm piston is an alternate .020 oversize option.

What standard pistons are available?
Pro Marine stocks both the Vertex 24228STD and Wiseco 3207PS standard 79mm pistons.

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

What main bearings are available?
The Pro Marine 4CYLSSMAIN main bearing set is linked above.

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

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

Dealer Discounts & Store Policies

Dealer / Marine Industry Discounts

Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.

Apply for a Dealer Account

Shipping Policy

Free shipping on orders over $100 continental U.S.
Orders received before 5:30 PM EST ship the same business day.
Typical delivery time is 1-5 business days.

30-Day Return Policy

Returns accepted within 30 days of delivery.
Parts must be new, unused, and in original packaging.
Installed parts are not returnable.
Return authorization is required before sending items back.

Need help with an order or return?
Contact Pro Marine
Phone: 941-721-3000

Searchable Terms

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Item#:

24228050

Manufacturer:

Vertex

Available:

In Stock

Your Price:

145.22

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Yamaha F75-F115 Intake Valve Stem Seal OEM K0A-A3721-00-00

Genuine Yamaha Intake Valve Seal for F75 F80 F90 F100 F115

Genuine Yamaha OEM Intake Valve Stem Seal

Yamaha F75-F115 Intake Valve Stem Seal - OEM K0A-A3721-00-00

The Yamaha K0A-A3721-00-00 Intake Valve Stem Seal is a genuine OEM replacement seal for select Yamaha four-stroke outboard cylinder heads.

Verified applications include select F75, F80, F90, F100, F115 and LF115 Yamaha four-stroke engines.

Pro Marine also stocks an aftermarket replacement, A3721, along with the matching exhaust valve seals, valve spring, intake valve and exhaust valve used during cylinder-head rebuilding.

Genuine Yamaha OEM Intake Valve Seal

OEM Number: K0A-A3721-00-00
Application: Intake Valve Stem
Engine Families: Yamaha F75-F115 and LF115