The Honda 78123-YB8-003 Liner is a genuine OEM component designed for WT20 and WT30 water pumps. As a direct Honda OEM part, it is manufactured to the same specifications as the original, ensuring proper fit and function within the pump housing. This liner is the correct replacement for WT20 and WT30 units — always verify your pump's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks.
Key Features
- Genuine OEM Fit — sourced directly from Honda, this liner matches the original dimensions and surface profile required for correct pump operation
- Designed for WT20 and WT30 Water Pumps — confirmed fitment for Honda's WT20 and WT30 centrifugal water pumps; check your serial number against the fitment table to confirm applicability
- Critical to Pump Efficiency — a worn or damaged liner reduces pumping capacity and output pressure; replacing it restores the pump to its intended performance
The liner is the wear surface inside the pump volute that works in close proximity to the impeller. It defines the running clearance between the spinning impeller and the pump housing, and that clearance directly controls how efficiently the pump moves water. As the liner wears, that gap widens, allowing water to recirculate internally rather than being pushed through the discharge — the result is reduced flow rate and lower output pressure. Replacing a worn liner restores the tight clearance the impeller needs to build proper pressure and move the rated volume of water.
Part Details
| Part Number | 78123-YB8-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Liner |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WT20, WT30 | 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.
