The Honda 78107-YG0-023 Volute Case is a genuine OEM replacement built for WT20 and WT30 water pumps. As a direct Honda OEM component, this part is manufactured to the same specifications as the original, ensuring the housing geometry and port dimensions that the pump depends on are preserved exactly. This Volute Case is confirmed for WT20 and WT30 water pumps — always verify your unit's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks.
Key Features
- Genuine OEM Housing Integrity — manufactured by Honda to maintain the precise internal profile the impeller relies on for consistent flow and pressure output
- Direct OEM Replacement — matches the original volute case exactly, allowing this part to install without modification to gasket surfaces, port alignment, or mounting flanges
- Confirmed Pump Fitment — designed for WT20 and WT30 water pumps, including multiple serial ranges within those models
- Verify Serial Number Before Ordering — Honda updates pump components at specific serial breaks; check your pump's serial number against the compatibility table to confirm this is the correct volute case for your unit
The volute case is the snail-shaped housing that surrounds the impeller in a centrifugal water pump. As the impeller spins, the volute's gradually widening channel converts the high-speed rotation of water into usable pressure and directs flow toward the discharge port — the shape of this housing is what makes the pump efficient. When the volute case cracks, erodes, or develops internal damage, the pump loses the ability to build pressure correctly, resulting in reduced flow, poor priming performance, and potential loss of pumping capacity entirely.
Part Details
| Part Number | 78107-YG0-023 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Volute Case |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WT20, WT30 | 1017145-1030812 |
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.
