The Honda 78101-YH6-000 Casing is a genuine OEM component designed for WH15 and WH20 water pumps. As a direct Honda OEM part, it is manufactured to the exact dimensions required for a correct fit in these pumps, ensuring the internal hydraulic path is restored as Honda intended. This casing is the right choice for operators rebuilding or repairing a WH15 or WH20 pump and want confidence that the replacement part matches the original exactly. Always verify your pump's serial number against the fitment table before ordering, as Honda periodically updates parts at serial number breaks.
Key Features
- Genuine Honda OEM Construction — manufactured to Honda's original specifications, maintaining the precise internal geometry that determines pump output and efficiency
- Correct Hydraulic Pathway — the casing forms the volute that guides water from the impeller to the discharge port; an incorrect or damaged casing directly reduces flow rate and pressure
- Confirmed Fitment — fits WH15 and WH20 Honda water pumps; check your serial number against the fitment table to confirm the correct casing for your unit
- Direct OEM Replacement — replaces the original casing with no rework needed, restoring the pump to its original pumping capacity
The casing is the main pump body that houses the impeller and forms the volute — the curved internal channel that converts the spinning impeller's velocity into pressure and directs water toward the discharge outlet. In a centrifugal pump like the WH15 and WH20, the close relationship between the impeller and the casing's inner profile is what determines how efficiently the pump moves water. A cracked, worn, or damaged casing disrupts that clearance, causing a drop in flow volume and discharge pressure, or allowing water to bypass the impeller entirely. Replacing a damaged casing with a genuine Honda part restores the original internal geometry and brings pump output back to specification.
Part Details
| Part Number | 78101-YH6-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Casing |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WH15, WH20 | 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.
