Copper Washer – Fits Yamaha 2-Stroke Outboard 40-60HP (Replaces 90209-27M07)
Copper Washer – Fits Yamaha 2-Stroke Outboard 40-60HP (Replaces 90209-27M07) 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
Copper Washer – Fits Yamaha 2-Stroke Outboard 40-60HP (Replaces 902...
Product Details
This is a high-quality aftermarket Copper Washer – Fits Yamaha 2-Stroke Outboard 40-60HP (Replaces 90209-27M07), specifically designed for use on the connecting rod's big end. It is fully compatible with Yamaha 2-Stroke 40HP and 60HP models from approximately 1995 to 2010. This washer also fits a variety of Yamaha-based engine designs, including those from Parsun, Hidea, HDX, and Seapro.
It serves as a direct replacement for Yamaha OEM part number 90209-27M07 and compatible washers with the same dimensions from Parsun, Hidea, HDX, and Seapro.
- Installs on the connecting rod big side.
- Engineered for marine gasoline environments.
- Precision-manufactured for a reliable seal.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 90209-27M07 | |
| Parsun / Hidea / HDX / Seapro | Compatible | Matches OEM dimensions |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Yamaha: Fits select 2-stroke 40HP and 60HP outboard models within the specified year range.
Parsun/Hidea/HDX/Seapro: Compatible with corresponding 40HP and 60HP 2-stroke models that use a Yamaha-based design. Please verify dimensions before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | Various 2-Stroke | 40 | 2-Stroke | 1995–2010 | 90209-27M07 | Connection rod big side |
| Yamaha | Various 2-Stroke | 60 | 2-Stroke | 1995–2010 | 90209-27M07 | Connection rod big side |
| Parsun | T40 | 40 | 2-Stroke | Compatible | Connection rod big side | |
| Parsun | T60 | 60 | 2-Stroke | Compatible | Connection rod big side | |
| Hidea | 40HP | 40 | 2-Stroke | Compatible | Connection rod big side | |
| Hidea | 60HP | 60 | 2-Stroke | Compatible | Connection rod big side | |
| HDX | 40HP | 40 | 2-Stroke | Compatible | Connection rod big side | |
| HDX | 60HP | 60 | 2-Stroke | Compatible | Connection rod big side | |
| Seapro | 40HP | 40 | 2-Stroke | Compatible | Connection rod big side | |
| Seapro | 60HP | 60 | 2-Stroke | Compatible | Connection rod big side |
Technical Specs
- Product Type
- Copper Washer
- Installation
- Connection Rod Big Side
- Fuel Type
- Gasoline
- Housing Material
- Copper
- Housing Color
- Copper/Bronze
- Dimensions
- 27mm (ID) x 45mm (OD) x 1mm (thickness)
- Other Technical Attributes
- Used for big end bearing connection rod
What’s in the Box
- 1 x Copper Washer (90209-27M07)
Installation Notes
- Ensure the engine is off and disconnected from the power source before starting work.
- Access the connecting rod assembly according to your engine's service manual. This is a critical internal component.
- Carefully remove the old washer, noting its orientation. Clean all mating surfaces of oil and debris.
- Place the new copper washer in position, ensuring a perfect fit.
- Reassemble the components, torquing all bolts to the manufacturer's specified values. Incorrect torque can lead to engine failure.
- Given the critical nature of this component, professional installation is strongly recommended.
Troubleshooting & FAQ
How do I know if this washer fits my specific engine model?
The most reliable method is to match the OEM part number 90209-27M07. You can also use the compatibility table provided and compare the dimensions (27mm ID x 45mm OD x 1mm thickness) with your old part.
What are the signs of a failing connecting rod washer?
A worn or damaged washer can contribute to excessive play in the connecting rod, leading to a knocking sound from the engine (rod knock), reduced performance, and potentially catastrophic engine failure if not addressed.
Can I reuse my old washer?
No. Crush washers like this one are designed for single use. They deform to create a seal and will not provide a reliable seal if reused, which can lead to oil pressure loss and severe engine damage.
Is this a direct replacement for the Yamaha part?
Yes, this is a direct aftermarket replacement for Yamaha OEM part number 90209-27M07, manufactured to the same specifications for material and dimensions.
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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