Washer, Plate - Fits Yamaha Outboard Motors (Replaces 90201-21M75-00)
Washer, Plate - Fits Yamaha Outboard Motors (Replaces 90201-21M75-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Washer, Plate - Fits Yamaha Outboard Motors (Replaces 90201-21M75-00)
Product Details
This replacement Washer, Plate – Fits Yamaha Outboard Motors (Replaces 90201-21M75-00) is a crucial hardware component used in a variety of Yamaha outboard engine applications to ensure proper spacing, load distribution, and secure fastening of components.
It serves as a direct replacement for Yamaha OEM part number 90201-21M75-00.
- Engineered for use in marine environments.
- Ensures secure connections and prevents component wear.
- Includes one plate washer as pictured.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 90201-21M75-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 90201-21M75-00 | Specific model compatibility is limited in source data; please verify part number. |
Technical Specs
- Product Type
- Plate Washer
- Application
- Yamaha Outboard Motors
- Dimensions
- 10.0mm x 10.0mm x 0.2mm
- OEM Part Number
- 90201-21M75-00
What’s in the Box
- 1 x Washer, Plate (90201-21M75-00)
Installation Notes
- Ensure the engine is off, cool, and disconnected from the power source before starting.
- Locate the assembly where the old plate washer is installed.
- Carefully remove the corresponding bolt or nut that secures the component.
- Remove the old, worn, or damaged washer.
- Clean the surfaces of the fastener and the component where the new washer will sit.
- Position the new plate washer correctly according to the service manual's diagram.
- Reinstall the bolt or nut and tighten it to the manufacturer-specified torque. Do not overtighten, as this can damage the components.
- Once installation is complete, reconnect the power and test for proper operation.
Troubleshooting & FAQ
How do I know if this washer fits my specific Yamaha model?
The best way to confirm fitment is by matching the OEM part number 90201-21M75-00 to the one listed in your engine's service or parts manual. Visual comparison with your old part is also highly recommended.
What are the signs of a failing or worn-out plate washer?
Signs of a failing washer include visible corrosion, cracking, warping, or significant thinning. Functionally, a worn washer can lead to loose connections, vibrations, or leaks in the assembly it is part of.
Is a specific torque setting required when installing this washer?
Yes. Always refer to your outboard motor's official service manual for the correct torque specifications for the bolt or nut that this washer is used with. Applying incorrect torque can lead to part failure or unsafe operation.
Can I reuse the old bolt/nut with this new washer?
It is generally recommended to use new fasteners (bolts, nuts) when replacing critical components, especially if the old ones show signs of corrosion, stripped threads, or fatigue. If the existing fastener is in excellent condition, it may be reused, but always tighten to the specified torque.
What is the function of a plate washer?
A plate washer, which is typically flat and thin, is designed to distribute the load of a threaded fastener (like a bolt or nut) over a wider surface area. This prevents damage to the component surface and ensures a secure, even connection.
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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