The Honda 90581-831-650 Washer (18MM) is a genuine OEM replacement designed for EG1400 and EG2200 generators, G150 and G200 horizontal shaft engines, and WT20 water pumps. As a direct Honda OEM component, this washer is manufactured to the exact specifications called out in Honda's parts catalog, ensuring it matches the original hardware it replaces. Verify part number 90581-831-650 against your machine's serial number and parts diagram before ordering, as Honda supersedes hardware across production runs.
Key Features
- Genuine OEM Hardware — sourced directly from Honda, this washer matches the original dimension and load-bearing profile specified for each listed application, so there is no guesswork on fit.
- Broad Cross-Application Fitment — listed for EG1400 and EG2200 generators, G150 and G200 horizontal shaft engines, and WT20 water pumps; confirm the application against your parts diagram before installation.
- Serial Number Verification Recommended — Honda updates hardware specifications at production breaks, so check your machine's serial number against the fitment table to confirm part number 90581-831-650 is correct for your unit.
A washer of this size distributes the clamping load of a fastener across a broader surface area, preventing the fastener head or nut from pulling through or deforming the material beneath it. Without the correct washer in place, fasteners can work loose under vibration or over-stress the surrounding material, leading to joint failure. Using the exact Honda-specified replacement keeps the assembly torqued and seated the way it was designed.
Part Details
| Part Number | 90581-831-650 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Washer (18MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EG1400, EG2200 | All |
| Horizontal Shaft Engine | G150, G200 | All |
| Water Pump | WT20 | 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.
