The Honda 78106-YB8-003 Impeller is a genuine OEM replacement designed for WT20 and WT30 water pumps. As a direct Honda OEM part, it is manufactured to the same specification as the original component your pump shipped with, ensuring the fit and flow characteristics match exactly what Honda engineered. This impeller is confirmed for WT20 and WT30 water pumps — verify your pump's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and the correct impeller can vary within a model run.
Key Features
- Genuine OEM Flow Performance — manufactured by Honda to deliver the correct vane geometry and clearance for full rated pumping capacity, unlike non-OEM impellers that may sacrifice flow rate or pressure head
- Direct OEM Replacement — part number 78106-YB8-003 drops straight into the pump volute in place of the original, with no modification to the pump housing required
- Fits WT20 and WT30 Water Pumps — confirmed fitment across both models; check your serial number against the compatibility table to confirm the correct impeller for your specific unit
- Restore Lost Output — a worn or eroded impeller causes a noticeable drop in flow rate and discharge pressure; replacing it with this genuine part brings the pump back to its original output
The impeller is the rotating core of a centrifugal water pump. Driven directly by the engine, its curved vanes spin at high speed inside the volute housing, drawing water in through the suction port and accelerating it outward toward the discharge. The efficiency of that transfer — how many gallons per minute the pump moves and at what pressure — depends almost entirely on the condition and geometry of the impeller. As the impeller wears, through abrasion from sand and debris or simple fatigue, flow rate and discharge pressure fall off progressively until the pump can no longer meet the demands of the job. Fitting a fresh Honda OEM impeller restores the pump's original hydraulic characteristics and puts it back to work at full capacity.
Part Details
| Part Number | 78106-YB8-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Impeller |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WT20, WT30 | 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.
