Yamaha Piston Kit – Fits Yamaha 25/50/60/70HP (Replaces 6H3-11631-01-96)
Yamaha Piston Kit – Fits Yamaha 25/50/60/70HP (Replaces 6H3-11631-01-96) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This standard bore Yamaha Piston Kit is designed for a wide range of Yamaha 2-stroke outboard motors, including 25HP, 50HP, 60HP, and 70HP models manufactured between 1984 and 2006. The kit provides everything needed for a single-cylinder replacement, ensuring restored engine compression and performance.
It serves as a direct replacement for Yamaha OEM part 6H3-11631-01-96 and is an equivalent for Wiseco part WIS-3132PS.
- Complete Kit: Includes the piston, rings, wrist pin, and clips for a full replacement.
- Engine Installation: Designed for installation in the engine's powerhead assembly.
- Durable Material: Constructed from high-strength aluminum alloy to meet OEM specifications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Yamaha | 6H3-11631-01-96 |
| Wiseco | WIS-3132PS |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | 25B/BETO | 25 | 2-Stroke | 1994–1995 | 6H3-11631-01-96 |
| Yamaha | 50G/GEO/GETO | 50 | 2-Stroke | 1993–2007 | 6H3-11631-01-96 |
| Yamaha | 60TLRU/60ELRU/60TLRU | 60 | 2-Stroke | 1996 | 6H3-11631-01-96 |
| Yamaha | 60TLRV/C60TLRV | 60 | 2-Stroke | 1997 | 6H3-11631-01-96 |
| Yamaha | 60TLRW/C60TLRW | 60 | 2-Stroke | 1998 | 6H3-11631-01-96 |
| Yamaha | 60TLRX/C60TLRX | 60 | 2-Stroke | 1999 | 6H3-11631-01-96 |
| Yamaha | 60TLRY/C60TLRY | 60 | 2-Stroke | 2000 | 6H3-11631-01-96 |
| Yamaha | 60TLRZ/C60TLRZ | 60 | 2-Stroke | 2001 | 6H3-11631-01-96 |
| Yamaha | 60TLRA | 60 | 2-Stroke | 2002 | 6H3-11631-01-96 |
| Yamaha | 60TLRB | 60 | 2-Stroke | 2003 | 6H3-11631-01-96 |
| Yamaha | 60TLRC | 60 | 2-Stroke | 2004 | 6H3-11631-01-96 |
| Yamaha | 60TLRD | 60 | 2-Stroke | 2005 | 6H3-11631-01-96 |
| Yamaha | 60TLR | 60 | 2-Stroke | 2006 | 6H3-11631-01-96 |
| Yamaha | 70ETLN | 70 | 2-Stroke | 1984 | 6H3-11631-01-96 |
| Yamaha | 70ETLK | 70 | 2-Stroke | 1985 | 6H3-11631-01-96 |
| Yamaha | 70ETLJ | 70 | 2-Stroke | 1986 | 6H3-11631-01-96 |
| Yamaha | 70ETLH | 70 | 2-Stroke | 1987 | 6H3-11631-01-96 |
| Yamaha | 70ETLG | 70 | 2-Stroke | 1988 | 6H3-11631-01-96 |
| Yamaha | 70ETLF | 70 | 2-Stroke | 1989 | 6H3-11631-01-96 |
| Yamaha | 70ETLD | 70 | 2-Stroke | 1990 | 6H3-11631-01-96 |
| Yamaha | 70TLRP/70TRP | 70 | 2-Stroke | 1991 | 6H3-11631-01-96 |
| Yamaha | 70TLRQ | 70 | 2-Stroke | 1992 | 6H3-11631-01-96 |
| Yamaha | 70TLRR | 70 | 2-Stroke | 1993 | 6H3-11631-01-96 |
| Yamaha | 70TLRS | 70 | 2-Stroke | 1994 | 6H3-11631-01-96 |
| Yamaha | 70TLRT | 70 | 2-Stroke | 1995 | 6H3-11631-01-96 |
| Yamaha | 70TLRU | 70 | 2-Stroke | 1996 | 6H3-11631-01-96 |
| Yamaha | 70TLRV | 70 | 2-Stroke | 1997 | 6H3-11631-01-96 |
| Yamaha | 70TLRW | 70 | 2-Stroke | 1998 | 6H3-11631-01-96 |
| Yamaha | 70TLRX | 70 | 2-Stroke | 1999 | 6H3-11631-01-96 |
| Yamaha | 70TLRY/C70TLRY | 70 | 2-Stroke | 2000 | 6H3-11631-01-96 |
| Yamaha | 70TLRZ/C70TLRZ | 70 | 2-Stroke | 2001 | 6H3-11631-01-96 |
| Yamaha | 70TLRA | 70 | 2-Stroke | 2002 | 6H3-11631-01-96 |
| Yamaha | 70TLRB | 70 | 2-Stroke | 2003 | 6H3-11631-01-96 |
| Yamaha | 70TLRC | 70 | 2-Stroke | 2004 | 6H3-11631-01-96 |
| Yamaha | 70TLRD | 70 | 2-Stroke | 2005 | 6H3-11631-01-96 |
| Yamaha | 70TLR | 70 | 2-Stroke | 2006 | 6H3-11631-01-96 |
| Yamaha | P60TLHP | 60 | 2-Stroke | 1991 | 6H3-11631-01-96 |
| Yamaha | P60TLHQ | 60 | 2-Stroke | 1992 | 6H3-11631-01-96 |
| Yamaha | P60TLHR | 60 | 2-Stroke | 1993 | 6H3-11631-01-96 |
| Yamaha | P60TLHS | 60 | 2-Stroke | 1994 | 6H3-11631-01-96 |
| Yamaha | P60TLHT | 60 | 2-Stroke | 1995 | 6H3-11631-01-96 |
| Yamaha | P60TLHU | 60 | 2-Stroke | 1996 | 6H3-11631-01-96 |
| Yamaha | P60TLHV | 60 | 2-Stroke | 1997 | 6H3-11631-01-96 |
| Yamaha | P60TLHW | 60 | 2-Stroke | 1998 | 6H3-11631-01-96 |
| Yamaha | P60TLHX | 60 | 2-Stroke | 1999 | 6H3-11631-01-96 |
Technical Specs
- Product Type
- Piston Kit
- Installation
- Engine Powerhead
- Fuel Type
- Gasoline (2-Stroke)
- Piston Material
- Aluminum Alloy
- Piston Diameter
- 72mm (2.834")
- Wrist Pin Diameter
- 20mm
- Bore Size
- Standard
- Product Dimensions
- 3.38" L x 3.13" W x 3.0" H
- Weight
- 0.42 kg (0.93 lb)
What’s in the Box
- 1 x Piston (Replaces 6H3-11631-01-96)
- 1 x Set of Piston Rings
- 1 x Wrist Pin
- 2 x Pin Clips
Installation Notes
- Disconnect the battery and ensure the fuel supply is shut off before beginning work.
- Drain the engine oil and coolant completely.
- Carefully remove the cylinder head and related components to access the old piston.
- Remove the old piston assembly and thoroughly clean the cylinder bore, inspecting for any scratches or damage.
- Install the new rings onto the new piston, ensuring proper gap alignment per the service manual.
- Liberally lubricate the new piston, rings, and cylinder wall with fresh 2-stroke engine oil.
- Use a piston ring compressor tool to gently guide the new piston assembly into the cylinder.
- Reassemble all components in the reverse order of removal. Use a torque wrench to tighten all fasteners to the manufacturer's specified values.
- Refill engine oil and coolant, then check for any leaks before starting the engine.
Troubleshooting & FAQ
How do I confirm this piston kit fits my specific engine?
The most reliable method is to match your engine's model and year to the compatibility table. You can also verify the OEM part number (6H3-11631-01-96) in your engine's service manual or by inspecting the existing piston if possible.
What are common signs that a piston needs to be replaced?
Symptoms of a failing piston include low compression in one or more cylinders, excessive smoke from the exhaust, a knocking or rattling sound from the engine, and a noticeable loss of power.
Is there a specific break-in procedure after installing a new piston?
Yes. A proper break-in period is crucial for seating the new rings. Typically, this involves running the engine at varied, low-to-mid RPMs for the first few hours of operation, avoiding full-throttle acceleration. Always consult your engine's service manual for specific break-in guidelines.
How does an aftermarket piston compare to the OEM Yamaha part?
Our aftermarket pistons are engineered to meet or exceed OEM specifications for fit, material composition, and performance. They are manufactured in certified facilities and provide a reliable, cost-effective alternative to the original manufacturer's part.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before ordering. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement part, not an OEM component.
- Professional installation is strongly recommended for safety and to ensure optimal engine performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or quality control.
Payment & Security
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