Piston Ring Kit (0.50mm OS) – Fits Yamaha 60/70HP Outboard Engines (Replaces 6K5-11601-22)
Piston Ring Kit (0.50mm OS) – Fits Yamaha 60/70HP Outboard Engines (Replaces 6K5-11601-22) 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 aftermarket Piston Ring Kit (0.50mm OS) is designed for Yamaha 2-stroke 50, 60, and 70 HP E-series outboards manufactured between 1997–2013. These 0.50mm oversize rings are specifically for cylinders that have been bored to a 72.5mm diameter to restore compression and performance.
This kit serves as a direct replacement for Yamaha OEM part numbers 6K5-11601-22 and 6K5-11601-22-00.
- Installation: Fits internally within the engine block cylinder.
- Engine Compatibility: Designed for 2-stroke gasoline (petrol) outboards.
- Specification: 0.50mm (0.020") oversize for 72.5mm piston diameter.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6K5-11601-22 |
| Yamaha | 6K5-11601-22-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fits a wide range of Yamaha 60HP and 70HP 2-stroke models. Ensure your specific model and year are listed for correct fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | E60HE | 60 | 2-Stroke | 1997–2013 | 6K5-11601-22 | |
| Yamaha | E60HM | 60 | 2-Stroke | 1997–2013 | 6K5-11601-22 | |
| Yamaha | E60H | 60 | 2-Stroke | 1997–2013 | 6K5-11601-22 | |
| Yamaha | E60MHZ | 60 | 2-Stroke | 1997–2013 | 6K5-11601-22 | |
| Yamaha | E60MLHA | 60 | 2-Stroke | 1997–2013 | 6K5-11601-22 | |
| Yamaha | E60ELHB | 60 | 2-Stroke | 1997–2013 | 6K5-11601-22 | |
| Yamaha | E60HMHD | 60 | 2-Stroke | 1997–2013 | 6K5-11601-22 | |
| Yamaha | 70B | 70 | 2-Stroke | 1997–2013 | 6K5-11601-22 | Compatible with E-series models |
| Yamaha | 70BEHDO | 70 | 2-Stroke | 1997–2013 | 6K5-11601-22 | Compatible with E-series models |
| Yamaha | 70BEMO | 70 | 2-Stroke | 1997–2013 | 6K5-11601-22 | Compatible with E-series models |
| Yamaha | 70BEO | 70 | 2-Stroke | 1997–2013 | 6K5-11601-22 | Compatible with E-series models |
| Yamaha | 70BETO | 70 | 2-Stroke | 1997–2013 | 6K5-11601-22 | Compatible with E-series models |
| Yamaha | 70TDR | 70 | 2-Stroke | 1997–2013 | 6K5-11601-22 | Compatible with E-series models |
| Yamaha | 70TR | 70 | 2-Stroke | 1997–2013 | 6K5-11601-22 | Compatible with E-series models |
Technical Specs
- Product Type
- Piston Ring Kit (0.50mm Oversize)
- Installation
- Engine Block (Cylinder)
- Fuel Type
- Gasoline (Petrol)
- Product Dimensions
- Height: 1.2cm; Width: 8.5cm; Length: 9.0cm
- Ring Diameter
- 72.5mm (for 0.50mm oversize bore)
- Fitting Type
- Internal Cylinder
- Oversize
- 0.50mm (0.020")
- Warranty
- Varies by seller (Typically 1 year)
What’s in the Box
- 1 x Piston Ring Kit (6K5-11601-22)
Installation Notes
- Disconnect the battery and safely drain engine fluids (oil and coolant).
- Remove the cylinder head and piston assembly according to the engine's service manual.
- Carefully remove the old piston rings using a ring expander tool to avoid damaging the piston.
- Thoroughly clean the piston's ring grooves, removing all carbon buildup.
- Install the new rings onto the piston, ensuring the correct orientation and sequence for the oil and compression rings.
- Lubricate the new rings, piston, and cylinder wall with fresh engine oil.
- Use a piston ring compressor tool to gently guide the piston assembly back into the cylinder.
- Reassemble the engine, torquing all bolts to the manufacturer's specified values.
Troubleshooting & FAQ
How do I know if I need oversize piston rings?
Oversize rings are required when the engine cylinder has been machined (bored) to a larger diameter to correct for wear or damage. You should only purchase this 0.50mm OS kit if your cylinder has been specifically bored to 72.5mm.
What are the signs of failing piston rings?
Common symptoms include excessive blue or gray exhaust smoke, a noticeable loss of engine power, high oil consumption between changes, and poor results from a compression test.
Is this kit for one piston or the whole engine?
This kit contains a complete set of rings to service a single piston. For a 3-cylinder engine, you would need to purchase three kits.
Do I need to check the ring gap before installation?
Yes, it is critical. Always check the end gap of the new rings inside the cylinder bore before final installation. Refer to your engine's official service manual for the correct gap specifications and measurement procedure.
Are special tools required for this installation?
Yes. A piston ring expander (for removal/installation onto the piston) and a piston ring compressor (for inserting the piston into the cylinder) are essential to prevent damage to the rings, piston, and cylinder wall.
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.
Payment & Security
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