The Honda 90478-700-000 Washer A (6MM) is a genuine OEM replacement designed for a wide range of Honda equipment, including B75 and BF100 portable outboard motors, the BF75 outboard motor, the BF8 portable outboard motor, F28 tillers, G80 horizontal shaft engines, and HT3810, HT3813, and HT4213 lawn tractors. As a genuine OEM component, this washer is sourced directly from Honda and meets the same specifications as the original part installed at the factory. Confirm your model and serial number against the fitment table before ordering, as Honda supersedes and updates hardware at serial breaks across this broad equipment range.
Key Features
- Genuine OEM Hardware — sourced directly from Honda, matching the original washer specification for each listed application
- 6MM Sizing — the (6MM) designation is the variant identifier; confirm this size matches your machine's requirement before ordering
- Broad Equipment Coverage — listed for portable outboard motors, outboard motors, a tiller, a horizontal shaft engine, and lawn tractors, including the B75, BF75, BF100, BF8, F28, G80, HT3810, HT3813, and HT4213
- Serial Number Verification Recommended — Honda updates hardware specifications at serial breaks, so cross-check your unit's serial number against the fitment table to confirm this is the correct washer for your machine
A washer of this type serves as a load-distributing spacer or retention aid at a fastened joint, spreading clamping force evenly across a mating surface to protect components and maintain secure assembly. On equipment that sees vibration, thermal cycling, or repeated service — whether an outboard motor, a tiller, an engine, or a lawn tractor — a correctly sized washer prevents fastener loosening and surface damage over time. Using the right OEM-specified washer ensures the joint behaves as Honda engineered it, avoiding the wear or fastener failure that an incorrect substitute can cause.
Part Details
| Part Number | 90478-700-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Washer A (6MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | G80 | All |
| Lawn Tractor | HT3810, HT3813, HT4213 | All |
| Outboard Motor | BF75 | All |
| Portable Outboard Motor | B75, BF8, BF100 | All |
| Tiller | F28 | 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.
