The Honda 78101-YG2-023 Casing is a genuine OEM component designed for the WT40 water pump. Sourced directly from Honda, this casing is manufactured to the exact specifications of the original part, ensuring a correct fit without guesswork. Verify your unit's serial number against the fitment table to confirm this is the right casing for your machine.
Key Features
- Genuine OEM Construction — manufactured by Honda to the same specification as the original, ensuring the internal geometry that governs pump performance is maintained exactly.
- Critical to Flow Performance — the casing forms the pump's volute housing, and a cracked, worn, or damaged original compromises both output pressure and volume; this replacement restores full pump capability.
- Direct Fit for the WT40 — engineered specifically for the WT40 water pump; check your serial number against the fitment table before ordering to ensure compatibility with your serial range.
The casing is the outer housing that encloses the impeller and forms the volute — the curved internal passage that converts the impeller's rotational energy into flow and pressure. On a centrifugal pump like the WT40, the shape and integrity of this volute are what direct water efficiently from the inlet to the discharge port. A casing that is cracked, eroded, or damaged at the sealing surfaces allows internal recirculation and pressure loss, causing the pump to deliver less flow than its rating — or fail to prime altogether. Replacing a compromised casing restores the tight running clearances and sealed passages the WT40 depends on to move high volumes of water reliably.
Part Details
| Part Number | 78101-YG2-023 |
|---|---|
| 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.
