The Honda 90503-921-020 Washer (17MM) is a genuine OEM replacement designed for Honda portable and standard outboard motors, including the B75, BF100, BF15, BF75, BF8, and BF9. As a direct Honda OEM part, it meets the exact dimensional specifications of the original component it replaces. Because Honda supersedes parts across serial ranges, confirm your outboard's serial number against the fitment table before ordering to ensure this is the correct washer for your unit.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this washer matches the original part's dimensions and tolerances exactly as fitted at the factory.
- 17MM Sizing — the 17MM designation identifies this specific variant; verify it against your outboard's parts diagram to confirm it is the correct size for your application.
- Broad Outboard Fitment — listed for Honda B75, BF8, BF9, BF15, BF75, and BF100 outboard motors; check your serial number against the compatibility table to confirm the correct fit for your model.
- Direct OEM Replacement — installs in place of the original with no rework, keeping your outboard's assembly to Honda's original specification.
A washer of this size serves as a load-distributing fastener component in Honda outboard motors, spreading the clamping force of a bolt or nut across a wider surface area to prevent damage to the mating parts and maintain secure, consistent assembly. In a marine environment, using the correctly sized washer matters — an undersized or incorrect washer can allow fasteners to work loose under vibration, leading to misalignment or component damage. Replacing a worn or damaged washer with the correct Honda OEM part restores proper clamp load.
Part Details
| Part Number | 90503-921-020 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Washer (17MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Outboard Motor | BF75 | All |
| Portable Outboard Motor | B75, BF8, BF9, BF15, BF100 | 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.
