The Honda 78130-YH6-003 Mechanical Seal Assembly is a genuine OEM component designed for WH15 and WH20 water pumps. Sourced directly from Honda, this assembly delivers the exact fit and sealing performance the original design requires. Confirm your pump's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and the correct assembly varies by production run.
Key Features
- OEM Sealing Integrity — genuine Honda construction ensures the rotating and stationary faces meet to the same specification as the original, maintaining full pump pressure and flow without leakage at the shaft.
- Direct Replacement — engineered to drop into WH15 and WH20 water pumps as a direct swap for the original assembly, with no adaptation needed at the pump housing.
- Confirmed Fitment — covers WH15 and WH20 Honda water pumps; verify your serial number against the fitment table, as this assembly may vary across production ranges.
- Leak Prevention — a functioning mechanical seal keeps water from reaching the engine-side bearing and crankcase; a worn or damaged seal allows pumped fluid to migrate inward, causing bearing failure and broader pump damage.
A mechanical seal assembly is the dynamic sealing interface between the pump's rotating impeller shaft and its stationary housing. It consists of a rotating seal face pressed against a fixed mating ring, held in contact by spring pressure, creating a fluid-tight barrier that allows the shaft to spin freely while preventing pumped water from escaping along the shaft bore. When the seal faces wear, score, or crack — through abrasive water, dry running, or age — the pump will weep or leak at the shaft, and continued operation risks contaminating the bearing and driving end of the unit. Replacing the Mechanical Seal Assembly at the first sign of shaft leakage restores the pump's sealing performance and protects the surrounding components from water damage.
Part Details
| Part Number | 78130-YH6-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Mechanical Seal Assembly |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WH15, WH20 | 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.
