The Honda 78122-YG2-003 Shim Washer is a genuine OEM component designed for WT40 water pumps. As a direct Honda OEM part, it is manufactured to the exact dimensions the WT40 requires, ensuring proper fit at installation. Confirm your pump's serial number against the fitment table before ordering, as Honda periodically supersedes parts at production breaks.
Key Features
- Genuine Honda OEM Part — sourced directly from Honda, this shim washer meets the exact dimensional spec the WT40 water pump demands, not an approximation of it.
- Precise Shim Control — shim washers set critical clearances and endplay within the pump's rotating assembly; using the correct thickness ensures components run within their designed tolerances.
- WT40 Water Pump Fitment — built specifically for the Honda WT40; verify your serial number against the compatibility table to confirm this is the right shim for your unit.
A shim washer is a precision spacer used to establish and maintain exact clearances between rotating or mating components inside a pump. In a centrifugal water pump like the WT40, correct shimming keeps the impeller and shaft assembly within their designed operating tolerances, which directly affects pump efficiency and the service life of surrounding components. When a shim washer is worn, missing, or of the wrong thickness, clearances shift, leading to accelerated wear and reduced pump output.
Part Details
| Part Number | 78122-YG2-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Shim Washer |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WT40 | 1105132-9999999 |
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.
