The Honda 78101-YG3-000 Casing is a genuine OEM component designed for the WB20 water pump. As a direct Honda OEM part, it is manufactured to the same specifications as the original, ensuring a correct fit and proper pump operation. This casing is the right choice for operators restoring a WB20 to full working condition. Always verify your unit's serial number against the fitment table to confirm this is the correct part for your pump.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this casing meets the original design requirements for the WB20 water pump, ensuring the pump housing geometry is exactly as built.
- Correct Pump Housing Fit — the casing forms the main outer body of the pump's hydraulic section, so dimensional accuracy is critical to maintaining proper running clearances and sealing.
- Designed for the WB20 Water Pump — built specifically for Honda WB20 water pumps; reference part number 78101-YG3-000 and confirm your serial number before ordering.
The casing is the main outer housing that encloses the impeller and volute of the WB20 centrifugal water pump. It directs water flow from the inlet through the pump chamber and out to the discharge port, and its internal geometry is precisely shaped to maintain the running clearances that allow the impeller to move water efficiently. When the casing is cracked, worn, or damaged, the pump loses prime, output pressure drops, and flow rate falls — replacing it restores the pump to its original performance.
Part Details
| Part Number | 78101-YG3-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Casing |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WB20 | 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.
