The Honda 78106-YE0-003 Impeller is a genuine OEM replacement designed for the WMP20 water pump. Sourced directly from Honda, this component meets the same specifications as the original part installed at the factory. If your pump has lost flow capacity or is no longer priming correctly, a worn impeller is a likely cause — and this is the correct OEM replacement to restore full performance. Confirm your unit's serial number against the fitment table before ordering to ensure this is the right version for your pump.
Key Features
- Genuine OEM Flow Performance — as a Honda OEM impeller, this part is built to the exact vane geometry and dimensional tolerances that determine flow rate and pumping efficiency in the WMP20.
- Direct OEM Replacement — engineered to drop into the WMP20 volute housing without modification, restoring proper running clearance and seal contact.
- Correct Fit for the WMP20 Water Pump — verify your serial number against the fitment table, as Honda supersedes impeller part numbers at production breaks.
- Restores Full Pump Output — a worn or damaged impeller reduces flow volume, causes cavitation, and can result in complete loss of prime; replacing it with this OEM part brings the pump back to rated output.
The impeller is the rotating core of the WMP20's centrifugal pumping system. Driven by the engine, its vanes spin at high speed inside the volute housing, creating the centrifugal force that draws water in through the inlet and pushes it out under pressure through the discharge port. Over time, the vane edges wear or erode, reducing the running clearance between the impeller and the housing — this causes a drop in flow rate, difficulty priming, and eventually no pumping action at all. Replacing a worn impeller with a correctly sized OEM part is the most direct way to return the WMP20 to its full rated flow capacity.
Part Details
| Part Number | 78106-YE0-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Impeller |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WMP20 | 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.
