The Honda 78104-YB3-K90 Outlet (NPTF) is a genuine OEM replacement designed for the WB20 water pump. As a factory-original component, this outlet is an exact match for the connection it replaces, ensuring a proper seal with no guesswork on thread form. Confirm part number 78104-YB3-K90 against your pump's existing outlet before ordering, as Honda supersedes parts at serial breaks and the fitment table will show which serial ranges apply to your unit.
Key Features
- Genuine OEM Thread Integrity — NPTF thread form is manufactured to Honda's original specification, delivering a pressure-tight seal critical to keeping water moving through the pump circuit without leaks at the discharge port.
- Direct OEM Replacement — sourced directly from Honda, this outlet drops in as a like-for-like replacement on the WB20 water pump with no rework to the surrounding connections.
- Serial Number Verification Recommended — Honda updates parts at production breaks, so check your pump's serial number against the fitment table to confirm this is the correct outlet for your specific WB20 unit.
The outlet is the discharge fitting through which pressurized water exits the pump body and enters the delivery hose or piping. On a centrifugal pump like the WB20, the impeller drives water outward through the volute and forces it out through this port, so a cracked, stripped, or leaking outlet directly compromises flow rate and delivery pressure. Replacing a damaged outlet restores the sealed discharge path the pump depends on to move water efficiently.
Part Details
| Part Number | 78104-YB3-K90 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Outlet (NPTF) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WB20 | 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.
