The Honda 78106-YG2-003 Impeller is a genuine OEM replacement built for the WT40 water pump. Sourced directly from Honda, this impeller matches the original component in every critical dimension, ensuring the pump restores full flow capacity without any guesswork. If your WT40 is losing prime, running weak, or failing to move water efficiently, a worn impeller is a common cause — and this is the correct OEM part to address it.
Key Features
- Genuine Honda OEM Part — manufactured to the same specification as the original, ensuring the correct blade geometry and clearances that the WT40 pump volute requires for rated flow performance.
- Direct OEM Replacement — this impeller is designed specifically for the WT40 water pump, dropping in as a direct swap with no adaptation needed.
- Restores Pumping Performance — a degraded impeller reduces flow rate and priming ability; replacing it with this genuine part brings the pump back to its designed output capacity.
- Verify Your Serial Number — Honda supersedes parts at production breaks, so confirm your WT40 serial number against the fitment table before ordering to ensure part number 78106-YG2-003 is correct for your unit.
The impeller is the rotating core of a centrifugal water pump. Driven by the engine, it spins at high speed inside the pump volute, using centrifugal force to draw water in through the inlet and push it out under pressure through the discharge port. Over time, abrasive debris, cavitation, and normal wear erode the impeller vanes, reducing the running clearance between the impeller and the volute casing — the result is a noticeable drop in flow rate, difficulty priming, or a pump that runs but moves little water. Replacing a worn impeller with this genuine Honda part is one of the most effective ways to bring a tired WT40 back to full working order.
Part Details
| Part Number | 78106-YG2-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Impeller |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WT40 | 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.
