The Honda 78106-YG1-003 Impeller is a genuine OEM replacement designed for WT20 and WT30 water pumps. As a direct Honda OEM component, this impeller is manufactured to the exact geometry required for proper flow and pressure output in your pump. This part is listed for both the WT20 and WT30 — confirm your pump model and serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and the correct impeller geometry varies by production run.
Key Features
- Genuine OEM Flow Geometry — engineered to Honda's original vane profile and diameter specifications, ensuring the impeller moves water at the volume and pressure your pump was designed to deliver, not an approximation of it
- Direct OEM Replacement — sourced directly from Honda, this impeller drops into the pump volute as the original did, with no alteration to housings or seals
- Fits WT20 and WT30 Water Pumps — confirmed fitment for Honda WT20 and WT30 centrifugal water pumps; verify your serial number against the fitment table, as Honda updates part numbers mid-production
- Restores Pumping Performance — a worn or damaged impeller causes reduced flow rate, loss of prime, and overheating; replacing it returns the pump to full output capacity
The impeller is the rotating core of a centrifugal water pump. Driven by the engine through the pump shaft, its curved vanes spin at high speed inside the volute housing, drawing water in through the inlet and accelerating it outward to the discharge port through centrifugal force. When the impeller wears, erodes, or cracks — often from running dry, abrasive debris, or cavitation — the pump loses the ability to generate suction and pressure, resulting in weak flow or a complete failure to prime. Replacing the impeller with a genuine Honda part restores the running clearance and vane efficiency the pump depends on for consistent output.
Part Details
| Part Number | 78106-YG1-003 |
|---|---|
| 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.
