The Honda 78136-YG2-003 Outlet Gasket is a genuine OEM replacement designed for the WT40 water pump. Sourced directly from Honda, this gasket is manufactured to the exact specifications required for a proper, leak-free seal at the pump outlet. Confirm part number 78136-YG2-003 against your unit's serial number using the fitment table to ensure this is the correct gasket for your machine.
Key Features
- Genuine OEM Sealing Integrity — manufactured by Honda to the precise thickness and material profile required at the outlet port, so the seal seats correctly the first time without gaps or distortion.
- Direct Replacement — this gasket installs as a drop-in replacement on the WT40 water pump, restoring the outlet connection to its original sealed condition.
- Check Your Serial Number — Honda periodically supersedes components at production breaks, so verify your pump's serial number against the fitment table before ordering.
- Prevents Pressure Loss — a compromised outlet gasket allows water to bypass the sealed joint, reducing discharge pressure and flow efficiency; replacing it restores the pump to full output.
The outlet gasket forms the static seal between the pump's discharge port and the outlet fitting, preventing water from escaping the pressurized flow path at the connection point. On a high-volume pump like the WT40, even a minor leak at this joint causes a measurable drop in discharge pressure and flow rate. When the gasket deteriorates, cracks, or is damaged during servicing, water bypasses the seal and the pump can no longer deliver its rated output — replacing the gasket is the straightforward fix that restores full pump performance.
Part Details
| Part Number | 78136-YG2-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Outlet Gasket |
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.
