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Outboard Motor Parts | OEM & Aftermarket
Shop OEM and aftermarket outboard motor parts for Mercury, Yamaha, Suzuki, Honda, Johnson / Evinrude / E-TEC, Tohatsu / Nissan, and Chrysler / Force engines. Pro Marine USA carries parts for routine maintenance, troubleshooting, repair, and complete marine engine rebuilds.
Browse by outboard manufacturer or engine system, or use our OEM parts lookup to identify the correct part number before ordering. Find cooling, fuel, ignition, electrical, internal engine, lower unit, steering, trim, service kit, gasket, seal, and rebuild parts in one place.
Shop Outboard Parts by Manufacturer
Chrysler / Force Outboard Parts for Chrysler and Force outboard repair 
Honda Outboard Honda cooling, fuel, electrical, and engine parts 
Johnson / Evinrude / E-TEC Outboard Johnson, Evinrude, E-TEC, and OMC replacement parts 
Mercury Outboard Mercury and Mariner maintenance, repair, and rebuild parts 
Suzuki Outboard Suzuki service, lower unit, fuel, and engine parts 
Tohatsu / Nissan Outboard Tohatsu and Nissan outboard replacement parts 
Yamaha Outboard Yamaha maintenance, repair, lower unit, and rebuild parts Find the Correct Outboard Part
Not sure which part fits your engine? Start with the engine manufacturer, horsepower, model number, serial number, and year whenever available.
Our OEM parts lookup lets you view factory parts diagrams and identify the original part number for many popular outboard engines. Once you have the OEM number, search Pro Marine to find available OEM and aftermarket replacement options.
Use Our OEM Parts Lookup »Shop Outboard Parts by Engine System
Outboard engines use several interconnected systems. Select your manufacturer above to browse the exact categories available for your engine, including the following common repair and maintenance areas.
Common Outboard Problems and Where to Start
- Engine overheating: inspect the water pump, impeller, thermostat, pressure-control components, cooling passages, and engine anodes.
- Hard starting or rough idle: check fuel delivery, carburetor or injector operation, spark plugs, ignition components, filters, and intake sealing.
- Weak spark or no spark: test ignition coils, stators, switch boxes or ignition modules, sensors, wiring, grounds, and related electrical components.
- Low compression or poor power: inspect pistons, rings, cylinder condition, head and powerhead gaskets, bearings, and other internal engine components.
- Milky gear lube: inspect prop shaft, driveshaft, shift shaft, bearing carrier, and other lower unit seals for water intrusion.
- Lower unit or gearcase noise: inspect bearings, gears, clutch components, shafts, and gear lube condition before continued operation.
- Trim or steering problems: inspect hydraulic fluid level, seals, hoses, trim motors, pumps, steering cylinders, and mechanical connections.
Why Buy Outboard Parts from Pro Marine USA?
- OEM and aftermarket replacement options for major outboard engine brands.
- Marine engine parts for routine maintenance, professional repair, and complete rebuild projects.
- OEM diagram and part-number lookup tools to help identify the correct component before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large selection of service kits, engine parts, lower unit components, fuel system parts, electrical parts, steering, and rigging products.
- Same-day weekday shipping available on qualifying in-stock orders placed before the shipping cutoff.
OEM and Aftermarket Outboard Parts
OEM parts are supplied by the original engine manufacturer and are designed for the specific engine application. Aftermarket parts are replacement components produced by independent marine parts manufacturers and may provide additional availability or value for many common repairs.
Pro Marine carries both genuine OEM parts and quality aftermarket replacement parts for many outboard maintenance, repair, and rebuild applications. Always confirm fitment using the engine model, serial number, horsepower, year range, or OEM part number when available.
Frequently Asked Questions
How do I find the correct parts for my outboard motor?
Start by identifying the engine manufacturer, horsepower, model number, serial number, and year. Select the manufacturer above to browse by engine system, or use the OEM parts lookup to locate the original part number from a factory diagram.
Can I search Pro Marine by OEM part number?
Yes. If you already have the OEM part number, enter it into the Pro Marine site search to locate available OEM and aftermarket replacement options. If you do not know the part number, use the OEM parts lookup first.
What information should I have before ordering an outboard part?
Have the engine manufacturer, horsepower, model number, serial number, and year whenever possible. An OEM part number from the original component or parts diagram is especially helpful because visually similar parts may fit different engine families.
What is the difference between OEM and aftermarket outboard parts?
OEM parts come from the original engine manufacturer. Aftermarket parts are replacement components manufactured by other marine parts companies for compatible applications. Pro Marine carries both OEM and aftermarket options across many common outboard engine systems.
Are aftermarket outboard motor parts reliable?
Quality aftermarket marine parts are commonly used for maintenance, professional repair, and engine rebuilding. The best option depends on the application, manufacturer, availability, and customer preference.
Do you carry parts for older outboard motors?
Yes. Pro Marine carries parts for many older Mercury, Mariner, Johnson, Evinrude, Chrysler, Force, Yamaha, Honda, Suzuki, Nissan, and Tohatsu outboards. Availability varies by engine family and component.
What outboard parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump impellers, complete water pump kits, thermostats, gear lube, drain plug seals, anodes, and manufacturer-specific service kit components.
Fitment Tip: Outboard parts can vary by model, serial range, horsepower, and production year. Confirm the OEM part number or engine identification information whenever possible before ordering.
976581
976582
976583
824052R1
824052R2
824052R3
822900R1
822900R2
822900R3
9737A8
Vertex Yamaha / Mercury 4-Stroke .010 Oversize Piston Kit
Yamaha F90-F115 & Mercury 115 EFI Vertex .010 Oversize Piston Kit - 24228025
The Vertex 24228025 Piston Kit is a .010 oversize / .25mm 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 the Yamaha 60C-W1164 and 68V-W1164 piston assemblies and Mercury 880895 piston assemblies.
This is NOT a standard-size piston.
The cylinder must be measured and properly machined for the .010 / .25mm oversize piston before installation.
Do not install this piston into a standard 79.00mm bore.
Piston Size & Application
| Specification | Details |
|---|---|
| Brand | Vertex |
| Part Number | 24228025 |
| Piston Size | .010 Oversize |
| Metric Oversize | .25mm Oversize |
| Standard Bore Reference | 79.00mm |
OEM & Cross Reference Piston Family
| Brand / Type | Part Number |
|---|---|
| Vertex | 24228025 |
| First OEM Reference | 60C-W1164-10-00 |
| 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 |
Oversize piston selection should always be based on actual cylinder measurements.
If the bore remains within standard-size limits, use a 79.00mm standard piston. If machining is required, choose the correct .010 or .020 piston based on the finished bore size.
Other Piston Options
Vertex Standard Piston - 24228STD
Size: 79.00mm Standard
Standard-size Vertex piston for cylinders that remain within standard bore specifications.
First OEM: 68V-W1164-02-00
View Vertex Standard Piston
Vertex .020 Oversize Piston - 24228050
Size: .020 / .50mm Oversize
Larger oversize Vertex piston option where cylinder condition requires machining beyond .010.
View Vertex .020 Piston
Wiseco Standard Piston - 3207PS
Size: 79.00mm Standard
Alternate Wiseco standard-size piston for compatible Yamaha F115 and Mercury 115 EFI applications.
View Wiseco Standard Piston
Wiseco .020 Oversize Piston - 3207P2
Size: 79.5mm / .020 Oversize
Wiseco .020 oversize alternative for correctly machined cylinders.
View Wiseco .020 PistonYamaha 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
This is the OEM Yamaha oversize ring option to review for the corresponding .25mm / .010 oversize piston configuration.
View .25mm OEM RingsReplacement Cylinder Sleeves
If cylinder damage cannot be corrected with an oversize bore, replacement cylinder sleeves may be required.
Advanced Sleeve 1185SC
Straight 4-stroke replacement sleeve for compatible powerhead rebuilds.
Verify sleeve dimensions and block machining requirements before installation.
View 1185SC Sleeve
Advanced Sleeve 1185SA
Alternate straight 4-stroke cylinder sleeve option for compatible Yamaha / Mercury engine rebuilding.
Compare sleeve dimensions to the block before machining.
View 1185SA SleeveMain & 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 factory 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 four-stroke applications.
First OEM Reference: 68V-11656-00-00
Eliminates the factory Yamaha rod-bearing color selection process.
View Rod Bearing SetComplete 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 replacement or other major internal repairs.
OEM Families: 6D8-W0001, 67F-W0001 and 68V-W0001
Piston Size Guide
| Finished Cylinder Size | Piston Options |
|---|---|
| 79.00mm Standard | Vertex 24228STD or Wiseco 3207PS |
| .25mm / .010 Oversize | Vertex 24228025 |
| .50mm / .020 Oversize | Vertex 24228050 or Wiseco 3207P2 |
| Cylinder Requires Sleeving | Inspect 1185SA / 1185SC sleeve options and machine the finished cylinder to the specification required by the selected piston. |
Shop Yamaha Engine Rebuild Parts by Model
Find additional pistons, rings, bearings, valves, gaskets, sleeves and internal engine components in the Yamaha Engine Rebuild Parts by Model section.
Shop Yamaha Engine Rebuild Parts by Model
When to Use a .010 Oversize Piston
A .010 oversize piston can be used when cylinder wear or damage requires machining beyond the standard bore but does not require a full .020 overbore.
The cylinder should be measured for diameter, taper and out-of-round before machining. The finished bore and piston-to-wall clearance should follow the piston manufacturer's specifications.
Parts to Inspect During an Engine Rebuild
- Cylinder diameter and bore condition
- Cylinder taper and out-of-round
- 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
- Vertex oversize piston kit
- Vertex part number 24228025
- .010 / .25mm oversize
- Fits extensive Yamaha F115 and LF115 applications
- Fits select Yamaha F75 and F90 applications
- Fits select Mercury 115HP EFI engines
- Standard Vertex piston linked above
- Vertex .020 piston linked above
- Wiseco standard and .020 piston options linked above
- Matching Yamaha OEM .25mm oversize rings linked above
- Replacement cylinder sleeves linked above
- Main and connecting rod bearings linked above
- Complete powerhead gasket kit linked above
FAQ
What size is Vertex 24228025?
It is a .010 / .25mm oversize piston.
Is this 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 79mm cylinder?
No. The cylinder must be correctly machined and finished for the
.25mm / .010 oversize piston.
Does this fit Yamaha F115?
Yes. The supplied engine fitment includes extensive 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.
What rings go with the .010 oversize piston?
The Yamaha OEM 11606 .25mm oversize ring kit is linked
above for the corresponding oversize piston configuration.
Do you have a .020 oversize Vertex piston?
Yes. The Vertex 24228050 is the .020 oversize option.
Do you have Wiseco piston options?
Yes. The Wiseco 3207PS standard 79mm and
3207P2 .020 / 79.5mm pistons are linked above.
Are 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 rod bearing set is linked above.
Is a complete 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.
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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60C-W1164-11-00
68V-W1164-10-00
68V-W1164-11-00
68V-W1164-12-00
880895A12
880895A16
880895T10
15410-93401
15410-93410
15410-93411
15410-94400
15410-94401
15430-87D10
9738A8
9738T10
9737A8
61A-41112-A0-00
61A-41112-A1-00
61A-41112-00-00
9738A8
9738T10
68F-11193-00-00
68F-11193-01-00
68F-11193-02-00
68T-24251-00-00
68T-24251-01-00