The Honda 98079-5547V Spark Plug (ZGR5A-4) is a genuine OEM ignition component designed for GX620 and GX670 horizontal shaft engines. As a factory-original part, it is manufactured to Honda's exact specifications for gap, heat range, and thread pitch — the same plug that ships in new Honda engines. This spark plug is a direct OEM replacement confirmed for GX620 and GX670 applications; always cross-reference your engine's serial number against the fitment table to ensure part number 98079-5547V is correct for your specific serial range.
Key Features
- OEM Heat Range and Gap Specification — the ZGR5A-4 designation identifies the exact heat range and electrode gap engineered for the combustion characteristics of these large-displacement horizontal shaft engines, ensuring consistent ignition timing and complete combustion
- Direct OEM Replacement — sourced from Honda and built to the same specification as the original plug, this component installs without modification on GX620 and GX670 engines
- Fits GX620 and GX670 Horizontal Shaft Engines — confirmed fitment for both models; check your engine's serial number against the compatibility table to verify the correct application before ordering
- Ignition Integrity — a worn or fouled spark plug causes hard starting, misfires, rough running, and elevated fuel consumption; replacing it with the correct OEM plug restores clean ignition and smooth, consistent power output
A spark plug ignites the compressed air-fuel mixture inside the engine's combustion chamber, firing once every power stroke to keep the engine running. The heat range of the plug — encoded in the ZGR5A-4 designation — determines how quickly the electrode dissipates heat; a plug that runs too hot will pre-ignite the charge, while one that runs too cold will foul with carbon deposits. When a spark plug degrades, symptoms range from difficult cold starts and rough idle to misfires under load and increased fuel consumption, all of which are resolved by fitting the correct replacement plug.
Part Details
| Part Number | 98079-5547V |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Spark Plug (ZGR5A-4) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX620, GX670 | 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.
