The Honda 90403-889-000 Thrust Washer (25MM) is a genuine OEM component designed for G300, GX240, and GX270 horizontal shaft engines. Sourced directly from Honda, this part meets the same specifications as the washer installed at the factory, ensuring correct fit and function without adaptation. Because Honda supersedes parts across serial number breaks, confirm your engine's serial number against the fitment table before ordering to ensure part number 90403-889-000 is the right match for your unit.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this Thrust Washer (25MM) matches the original specification for correct axial load management in the engines it serves.
- Correct 25MM Sizing — the 25MM dimension is the key selection criterion; verify this matches the washer in your engine before fitting.
- Horizontal Shaft Engine Fitment — listed for G300, GX240, and GX270 horizontal shaft engines, including multiple serial ranges within those models.
- Serial Number Verification Recommended — Honda updates part numbers at specific serial breaks; check your engine's serial number against the compatibility table to confirm this is the correct supersession for your machine.
A thrust washer controls axial movement along a rotating shaft, absorbing the thrust loads generated as the engine runs and preventing metal-to-metal contact between moving components. By maintaining the correct running clearance, it reduces wear on adjacent parts and keeps shaft end-play within the tolerance the engine is designed to operate within. A worn or damaged thrust washer allows excessive axial movement, which can accelerate wear on surrounding components and lead to noise, vibration, or more significant internal damage over time.
Part Details
| Part Number | 90403-889-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Thrust Washer (25MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | G300, 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.
