Yamaha Hexagon Bolt with TH Washer (3-Pack) – Fits Yamaha Marine Engines (Replaces 90890-06821-00)
Yamaha Hexagon Bolt with TH Washer (3-Pack) – Fits Yamaha Marine Engines (Replaces 90890-06821-00) 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 component is a Yamaha Hexagon Bolt with TH Washer (3-Pack), designed as a direct replacement part for a wide range of Yamaha marine engines. It provides a secure fastening solution for various general service applications.
It directly replaces OEM part number 90890-06821-00.
- Easy OEM-style installation.
- Constructed from zinc-plated steel for durability.
- Includes a set of three identical bolts with integrated washers.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 90890-06821-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Yamaha | Various Marine Applications | 90890-06821-00 | General service part |
Technical Specs
- Product Type
- Hexagon Bolt with TH Washer (3-Pack)
- Installation
- OEM replacement
- Housing Material
- Steel
- Finish
- Zinc-plated
- Other Technical Attributes
- Pack of 3 identical bolts with washers
- Product Dimensions
- 7.0" L x 10.5" W x 1.0" H
- Package Dimensions
- 7.0" L x 10.5" W x 1.0" H
What’s in the Box
- 3 x Bolt hex w/ washer (90890-06821-00)
Installation Notes
- Disconnect the vessel's battery and ensure the engine is completely cool before starting work.
- Locate the existing bolt that requires replacement.
- Use a suitable wrench or socket to carefully remove the old bolt and washer.
- Visually compare the new bolt from the kit with your old part to confirm an exact match.
- Install the new hexagon bolt with its integrated TH washer into the designated position.
- Tighten the bolt to the manufacturer's recommended torque specifications found in your service manual. Avoid overtightening.
- Reconnect the battery and check the area for any issues before resuming normal operation.
Troubleshooting & FAQ
How do I know if this bolt is the right one for my engine?
The best way to confirm is by matching the part number 90890-06821-00 to your engine's service manual. Since this is a general service part, a visual comparison with your old part is crucial to ensure an exact fit.
What are the signs that this bolt needs replacement?
Common signs include visible corrosion, stripped or damaged threads, a rounded-off hexagon head, or if the bolt has become loose and can no longer be tightened to the correct torque specification.
Can I reuse my old washer with these new bolts?
It is not recommended. This kit includes three new bolts, each with its own pre-installed TH washer. Using the complete new hardware is essential for ensuring a proper and secure fit.
Is a special tool required for installation?
A standard metric wrench or socket set is typically sufficient for installation. However, always refer to your engine's specific service manual for official tool recommendations and correct torque settings.
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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