The Honda 78101-YD4-013 Casing is a genuine OEM replacement built for the WT40 water pump. Sourced directly from Honda's parts catalogue, this component meets the same specifications as the original part installed at the factory. This casing is designed specifically for the WT40, so buyers can confirm fitment using the serial number on their unit against the compatibility table.
Key Features
- Genuine Honda OEM — sourced directly from Honda's parts catalogue, ensuring the casing matches the original in form and function for the WT40 water pump.
- Correct Flow Path Geometry — as the volute housing of the pump, the casing defines the internal passage that converts impeller velocity into discharge pressure; an OEM-spec replacement preserves the flow characteristics Honda engineered into the WT40.
- WT40 Fitment — built exclusively for the WT40 trash pump; verify your unit's serial number against the fitment table before ordering to confirm this is the correct part for your machine.
The casing is the outer housing that forms the volute chamber of the WT40 centrifugal water pump. As the impeller spins, the casing channels water from the inlet, accelerates it through the volute, and directs it out through the discharge port — the shape and internal clearances of the casing directly determine the pump's flow rate and pressure output. A cracked, worn, or damaged casing causes pressure loss, reduced flow, and potential leakage, leaving the pump unable to perform to its rated capacity.
Part Details
| Part Number | 78101-YD4-013 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Casing |
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.
