The Honda 90511-921-000 Plain Washer (10MM) is a genuine OEM component designed for Honda BF and BFP series outboard motors, including models B75, BF100, BF115, BF135, BF140, BF15. As a Honda-sourced part, this washer is manufactured to the same standards as the original hardware used during production. Honda supersedes hardware across serial ranges, so confirm your outboard's model and serial number against the fitment table before ordering to ensure this is the correct washer for your unit.
Key Features
- Genuine OEM Hardware — sourced directly from Honda, matching the original specification used in production assembly across the BF and BFP outboard lineup.
- 10MM Bore Sizing — the 10MM internal diameter is the identifying dimension; verify this matches the fastener or shaft in your application before ordering.
- Broad Outboard Fitment — listed for a wide range of Honda portable and full-size outboard motors, including BF5, BF75, BF115, BF150, BF225, BF350, and BFP series models.
- Serial Number Verification Recommended — Honda updates hardware across production runs, so check your outboard's serial number against the compatibility table to confirm the correct part.
A plain washer distributes the clamping load of a fastener across a broader surface area, preventing the bolt head or nut from pulling through or damaging the material beneath it. In marine outboard applications, washers like this one appear throughout the assembly — from gearcase fasteners to powerhead hardware — wherever consistent clamping force and surface protection are required. Using the correctly sized OEM washer ensures the fastener assembly functions as designed; an undersized or incorrect washer can lead to uneven clamping, fastener loosening, or surface damage over time.
Part Details
| Part Number | 90511-921-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Plain Washer (10MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Outboard Motor | BF175 | 1400041-9999999 |
| Outboard Motor | BF135 | 1400183-9999999 |
| Outboard Motor | BF50, BF60, BF75, BF90, BF115, BF140, BF150, BF200, BF225, BF250, BF350, BFP60 | All |
| Portable Outboard Motor | B75, BF5, BF8, BF9, BF15, BF20, BF100, BFP8, BFP9 | 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.
