The Honda 98079-5685C Spark Plug (K20PR-UR) is a genuine OEM ignition component designed for the GX440 horizontal shaft engine. As a factory-sourced part carrying Honda's K20PR-UR specification, this spark plug delivers the correct heat range, electrode gap, and thread dimensions Honda engineering requires for the GX440. Confirm part number 98079-5685C against your engine's serial number and parts diagram before ordering, as Honda periodically updates ignition specifications across production runs.
Key Features
- Correct Heat Range — the K20PR-UR designation specifies the exact heat rating Honda requires for the GX440, ensuring the electrode runs at the right temperature to resist fouling and pre-ignition
- Genuine OEM Part — sourced directly from Honda, this spark plug meets the same specifications as the plug installed at the factory, with no substitution of electrode material or gap tolerance
- Direct-Fit for GX440 Engines — sized and threaded to seat correctly in the GX440 cylinder head without modification
- Serial Number Verification Recommended — Honda updates ignition components at production breaks, so confirm your engine's serial number against the fitment table to ensure this is the right plug for your unit
A spark plug ignites the compressed air-fuel mixture inside the engine's combustion chamber, and the K20PR-UR designation identifies the precise heat range, electrode type, and reach that Honda specifies for the GX440. A plug with the wrong heat range will either foul with carbon deposits at low operating temperatures or risk pre-ignition damage at high ones, both of which degrade power output and can shorten engine life. Replacing a worn or fouled plug with the correct OEM unit restores clean, consistent ignition and helps the GX440 start reliably and run at full efficiency.
Part Details
| Part Number | 98079-5685C |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Spark Plug (K20PR-UR) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX440 | 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.
