Yamaha Piston Kit (STD) – Fits Yamaha 60HP 2-Stroke Outboard Engines (Replaces 6K5-11631-03-95, 6H3-11631-01-96)
Yamaha Piston Kit (STD) – Fits Yamaha 60HP 2-Stroke Outboard Engines (Replaces 6K5-11631-03-95, 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
Yamaha Piston Kit (STD) – Fits Yamaha 60HP 2-Stroke Outboard Engine...
Product Details
This aftermarket Yamaha Piston Kit (STD) provides a reliable replacement for Yamaha 60HP 2-Stroke outboard engines manufactured from 1997 through 2013. It is engineered to meet original equipment specifications for a precise fit and dependable performance.
The kit serves as a direct interchange for Yamaha part numbers 6K5-11631-03-95, 6K5-11631-03, 6H3-11631-01-96, and 6H3-11631-01.
- Designed for direct OEM-style replacement to ensure straightforward installation.
- Kit includes the piston, pin, a full ring set, and two circlips for a comprehensive single-cylinder repair.
- Constructed from a high-quality aluminum alloy for durability in marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6K5-11631-03-95 |
| Yamaha | 6K5-11631-03 |
| Yamaha | 6H3-11631-01-96 |
| Yamaha | 6H3-11631-01 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | E60HE/HM/H | 60 | 2-Stroke | 1997–2013 | 6K5-11631-03-95 | - |
| Yamaha | E60MHZ | 60 | 2-Stroke | 1997–2013 | 6K5-11631-03-95 | - |
| Yamaha | E60MLHA | 60 | 2-Stroke | 1997–2013 | 6K5-11631-03-95 | - |
| Yamaha | E60ELHB | 60 | 2-Stroke | 1997–2013 | 6K5-11631-03-95 | - |
| Yamaha | E60HMHD | 60 | 2-Stroke | 1997–2013 | 6K5-11631-03-95 | - |
Technical Specs
- Product Type
- Piston Kit (Standard Size)
- Material
- High-quality aluminum alloy
- Piston Diameter
- 72mm (STD size)
- Engine Compatibility
- Yamaha 60HP 2-stroke outboard engines
- Installation
- Direct OEM replacement
- Product Height
- 7.5
- Product Width
- 7.5
- Product Length
- 8.0
What’s in the Box
- 1 x Piston (6K5-11631-03-95)
- 1 x Piston Pin
- 2 x Circlips
- 1 x Piston Ring Set (6K5-11601-02)
Installation Notes
- Disconnect the battery and fuel line for safety before beginning work.
- Remove the engine cowling, cylinder head cover, and head gasket.
- Rotate the crankshaft to bring the piston to the bottom of its stroke for easier access.
- Carefully remove the connecting rod cap bolts and the cap itself.
- Gently push the piston and connecting rod assembly out from the top of the cylinder.
- Remove the old piston from the connecting rod after removing the circlips and wrist pin.
- Install the new piston, ensuring rings are correctly seated and oriented per the service manual.
- Reassemble all components in reverse order, using new gaskets where required.
- Use a calibrated torque wrench to tighten all fasteners to the manufacturer's specified torque values.
- Always consult your engine's official service manual for detailed procedures, torque specs, and safety precautions.
Troubleshooting & FAQ
How do I know if this piston kit fits my engine?
This kit is specifically designed for Yamaha 60HP 2-stroke outboard engines manufactured from 1997–2013. The best way to confirm fitment is to match your engine's model and year to our compatibility chart and verify that your existing part number is one of the following: 6K5-11631-03-95, 6K5-11631-03, 6H3-11631-01-96, or 6H3-11631-01.
Is this a standard (STD) or oversized piston?
This is a standard (STD) size piston with a 72mm diameter. Oversized pistons are necessary only if the engine cylinder has been bored during a previous repair.
What are the signs of a failing piston?
Common symptoms of piston failure include a noticeable loss of engine compression, increased blue or white smoke from the exhaust, an audible knocking or rattling sound, and a general decrease in performance and power.
Do I need special tools for installation?
Yes, proper installation requires specialized engine tools, including a piston ring compressor, circlip pliers, and a precision torque wrench. To ensure safety and performance, we recommend that a qualified marine mechanic perform the installation.
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/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and 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 QC.
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