The Honda 90601-ZE2-000 Drain Plug Washer (12mm) is a genuine OEM replacement designed for an exceptionally wide range of Honda equipment, including BF-series outboard motors, GX240 and GX340 horizontal shaft engines, WT30 water pumps, HS80 two-stage snow blowers, H5013 and RT5000 multi-purpose tractors, and a broad lineup of Honda generators and welder generators. As a direct OEM part, this washer is manufactured to Honda's exact dimensions so the drain plug seats properly and the seal holds. Because Honda supersedes hardware across production runs, always confirm your unit's serial number against the fitment table before ordering.
Key Features
- OEM Sealing Integrity — manufactured to Honda's exact 12mm specification, delivering the crushing surface area the drain plug needs to form a leak-free seal at each oil or fluid change
- Direct-Fit Replacement — sized and profiled to match the original washer exactly, so it drops in without reworking the drain plug or its bore
- Broad Honda Compatibility — listed for BF-series outboard motors ranging from BF25 through BF350, GX240 and GX340 engines, WT30 water pumps, HS80 snow blowers, EB, EG, EM, EW, EX and EXW generators and welder generators, and H5013 and RT5000 tractors, including BF100 portable outboard motors
- Serial-Number Verification Recommended — Honda updates hardware at specific production breaks, so confirm your machine's serial number against the compatibility table to ensure this is the correct washer for your unit
- Prevents Drain-Down Between Services — a deformed or missing crush washer allows oil or gear oil to seep past the drain plug between service intervals; replacing it at every drain keeps fluid where it belongs
A drain plug washer is a small crush-type sealing ring that sits between the drain plug head and the mating surface of an oil sump, gearcase, or fluid reservoir. When the drain plug is torqued down, the washer deforms slightly to fill any microscopic irregularities in both surfaces, creating a fluid-tight seal. Over time — and especially after repeated removal and reinstallation — the washer loses its ability to deform and seal correctly, which leads to slow seepage around the plug. Replacing this washer at every oil or fluid change is standard service practice across all the equipment it fits, from outboard gearcases to generator crankcases to engine sumps, and it is one of the lowest-cost steps a technician can take to prevent a slow leak from becoming a larger problem.
Part Details
| Part Number | 90601-ZE2-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Drain Plug Washer (12mm) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EB5000, EG5000, EM5000, EX4500 | 1000001-1463925 |
| Generator | EB3500, EG3500, EM3500, EX3300 | 1000001-1518601 |
| Horizontal Shaft Engine | GX340 | 1000001-1463925 |
| Horizontal Shaft Engine | GX240 | 1000001-1518601 |
| Multi-Purpose Tractor | H5013, RT5000 | All |
| Outboard Motor | BF25, BF30, BF35, BF40, BF45, BF50, BF60, BF75, BF90, BF115, BF130, BF135, BF140, BF150, BF175, BF200, BF225, BF250, BF350, BFP60 | All |
| Portable Outboard Motor | BF100 | All |
| Two-Stage Snow Blower | HS80 | All |
| Water Pump | WT30 | 1000001-1518301 |
| Welder Generator | EW171, EXW171 | 1000001-1463925 |
| Welder Generator | EW140 | 1000001-1518601 |
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.
