The Honda 90403-ZH9-003 SK Washer is a genuine OEM replacement designed for GX240 and GX270 horizontal shaft engines. As a direct OEM part sourced through Honda's parts network, this washer is the correct specification for these engines — no guesswork on sizing or fit. Honda supersedes parts at serial number breaks, so confirm your engine's serial number against the fitment table before ordering to ensure part number 90403-ZH9-003 is the right match for your unit.
Key Features
- Genuine OEM Part — sourced directly from Honda, confirming this washer meets the original specification for GX240 and GX270 horizontal shaft engines
- Exact OEM Replacement — matches the original washer in every dimension, so installation is straightforward with no rework
- Serial Number Awareness — Honda updates part numbers at production breaks; always verify your engine serial number against the fitment table to confirm part number 90403-ZH9-003 applies to your machine
A washer serves as a load-distributing spacer or clamping element at a fastened joint, spreading the bearing force of a bolt or nut across a wider surface area. Without the correct washer in place, the clamping load can concentrate unevenly, leading to fastener loosening, surface damage, or a joint that does not hold its torque over time. Using the proper OEM-spec washer ensures the joint performs as Honda designed it across the full service life of the engine.
Part Details
| Part Number | 90403-ZH9-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | SK Washer |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX240, GX270 | 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.
