The Honda 90504-921-010 Plain Washer (6MM) is a genuine OEM component used across Honda's extensive outboard motor lineup, including models B75, BF100, BF115, BF130, BF135, BF140. As a Honda OEM part, this washer is manufactured to the exact specifications Honda requires, ensuring it seats and functions exactly. This plain washer is listed for a wide range of Honda portable and full-size outboard motors — verify part number 90504-921-010 against your motor's serial number and the fitment table to confirm the correct application before ordering. Sourcing a genuine OEM washer means no guesswork on dimensions or material grade.
Key Features
- Genuine Honda OEM — manufactured to Honda's exact dimensional standards, so this washer sits flush and performs the same load-distribution role as the original on your outboard motor.
- Broad Outboard Coverage — listed for Honda portable and full-size outboard motors including the B75, BF2, BF15, BF115, BF150, BF250, BFP series, and many more; check the fitment table for your specific model.
- Serial Number Verification Matters — Honda supersedes hardware at production breaks, so confirm your motor's serial number against the fitment table to ensure part number 90504-921-010 is the correct washer for your unit.
A plain washer distributes the clamping load of a fastener across a wider surface area, protecting the material beneath the bolt or nut from being pulled through or deformed under torque. On an outboard motor operating in a harsh marine environment, using the correct OEM washer ensures that fastener assemblies maintain proper clamp load over time. A missing or incorrect washer can allow fasteners to loosen prematurely or cause surface damage to the components being secured.
Part Details
| Part Number | 90504-921-010 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Plain Washer (6MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Outboard Motor | BF25, BF30, BF35, BF40, BF45, BF50, BF60, BF75, BF90, BF115, BF130, BF135, BF140, BF150, BF175, BF200, BF225, BF250, BFP60 | All |
| Portable Outboard Motor | B75, BF2, BF5, BF8, BF9, BF15, BF20, BF100, BFP8, BFP9, BFP15, BFP20 | All |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
