The Honda 98056-54757 Spark Plug (U14FSR-UB) is a genuine OEM spark plug designed for a wide range of Honda engines and equipment, including GXH50 horizontal shaft engines, GXV50 and GXV57 vertical shaft engines, BF2 portable outboard motors, EU1000 and EX700 inverter generators, F220 tillers, and WX15 water pumps. As a direct OEM replacement, this spark plug carries the correct heat range, electrode gap, and thread specification Honda engineering requires. Verify your equipment's serial number against the fitment table to confirm this is the right plug for your unit before ordering.
Key Features
- Correct Heat Range and Electrode Specification — the U14FSR-UB designation identifies a specific heat range and resistor construction; using the exact specified plug ensures clean ignition and protects against pre-ignition or fouling
- Genuine Honda OEM Part — sourced directly from Honda, this plug meets the same specification as the one your equipment left the factory with, with no guesswork on compatibility
- Broad Cross-Equipment Fitment — listed for GXH50 and GXV50/GXV57 engines, BF2 outboard motors, EU1000 and EX700 inverter generators, F220 tillers, and WX15 water pumps; confirm your model and serial number before ordering
- Ignition Reliability — a worn or fouled spark plug causes hard starting, misfires, and poor fuel efficiency; replacing it with the correct OEM plug restores crisp starting and smooth running across all operating conditions
A spark plug is the component that ignites the air-fuel mixture inside the engine's combustion chamber. At precisely the right moment in each engine cycle, the plug fires a high-voltage spark across its electrode gap, triggering combustion and driving the piston. Over time, electrodes erode and deposits build up on the plug, weakening the spark and leading to hard starts, rough idling, and increased fuel consumption. Replacing a worn plug with the correct OEM unit — matched to the right heat range and thread specification for the engine — restores full ignition performance and keeps the engine running cleanly.
Part Details
| Part Number | 98056-54757 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Spark Plug (U14FSR-UB) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GXH50 | All |
| Inverter Generator | EU1000, EX700 | All |
| Portable Outboard Motor | BF2 | All |
| Tiller | F220 | All |
| Vertical Shaft Engine | GXV50, GXV57 | All |
| Water Pump | WX15 | 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.
