The Honda 98079-54855 Spark Plug (W14EPR-U) is a genuine OEM replacement designed for a wide range of Honda vertical shaft engines, horizontal shaft engines, lawn mowers, and power carriers, including the GX120, GX160, GX610, GCV520, GCV530, GXV120, GXV160, GXV520, GXV530, HR214, HR215, HR216, HR194, HR195, HRA214, HRA215, HRA216, HRC215, HRC216, and HP400. As a factory-sourced component, this spark plug carries the correct heat range, electrode gap, and thread specification Honda engineers specified for these applications. Confirm your machine's serial number against the fitment table before ordering, as Honda periodically supersedes parts across production runs.
Key Features
- Correct Heat Range for the Application — the W14EPR-U designation specifies the exact thermal rating Honda requires for consistent ignition across these engines and equipment models; a mismatched heat range causes fouling or pre-ignition
- Genuine OEM Part — sourced directly from Honda, this spark plug meets the same electrode geometry and gap specification as the plug installed at the factory
- Broad Fitment — listed for GX120, GX160, GX610, GCV520, GCV530, GXV120, GXV160, GXV520, GXV530, HP400, and the HR/HRA/HRC lawn mower series, including models such as the HR216 and HRC216
- Serial Number Verification Recommended — Honda updates spark plug specifications at production serial breaks; check your serial number against the fitment table to confirm part number 98079-54855 is correct for your unit
- Clean Combustion, Easy Starting — a properly functioning spark plug fires every cycle reliably, supporting strong cold starts and smooth throttle response; a worn or fouled plug causes hard starting, misfires, and increased fuel consumption
A spark plug delivers the high-voltage electrical spark that ignites the air-fuel mixture inside the combustion chamber, initiating the power stroke that drives the engine. The W14EPR-U heat rating determines how quickly the electrode sheds heat during operation — too cold and deposits build up, too hot and the electrode erodes prematurely or causes uncontrolled pre-ignition. When a spark plug wears out or becomes fouled, the engine may be difficult to start, run unevenly, or consume more fuel than normal; replacing it with the correct OEM plug restores clean, consistent ignition and full engine performance.
Part Details
| Part Number | 98079-54855 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Spark Plug (W14EPR-U) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX120, GX160, GX610 | All |
| Lawn Mower | HR194, HR195, HR214, HR215, HR216, HRA214, HRA215, HRA216, HRC215, HRC216 | All |
| Power Carrier | HP400 | All |
| Vertical Shaft Engine | GCV520, GCV530, GXV120, GXV160, GXV520, GXV530 | 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.
