The Honda 98079-5487V Spark Plug (ZGR4A) is a genuine OEM ignition component designed for Honda GX610, GX620, GX670, GXV610, GXV620, GXV670 engines and EB11000 generators. As a factory-sourced part, this spark plug is built to the exact specification Honda requires for reliable ignition across these large-displacement horizontal and vertical shaft engines. Always verify your engine's serial number against the fitment table to confirm this is the correct plug for your specific unit, as Honda updates part assignments at serial breaks.
Key Features
- OEM Ignition Specification — the ZGR4A heat range and electrode gap are set by Honda to match the combustion demands of these large-displacement twin-cylinder engines, ensuring a consistent, correctly timed spark every time
- Direct OEM Replacement — sourced directly from Honda, part number 98079-5487V threads in as a straight swap with no adjustment needed
- Broad Fitment Across Honda's Twin-Cylinder Lineup — listed for GX610, GX620, GX670, GXV610, GXV620, GXV670 engines and EB11000 generators; check your serial number against the fitment table to confirm applicability to your unit
- Engine Starting and Running Performance — a worn or fouled spark plug causes hard starting, rough idle, misfires, and increased fuel consumption; replacing it with this OEM plug restores clean ignition and smooth power delivery
A spark plug is the ignition source for the engine's combustion cycle — it fires an electrical spark at precisely the right moment to ignite the air-fuel mixture inside the cylinder. In Honda's large-displacement twin-cylinder engines, maintaining the correct heat range and electrode condition is critical: a plug that runs too hot or too cold causes pre-ignition, fouling, or misfires that rob the engine of power and make it difficult to start. When a spark plug degrades — whether through electrode wear, carbon buildup, or cracked insulation — combustion becomes inconsistent, and the engine runs poorly or fails to start at all. Replacing the Spark Plug (ZGR4A) with the genuine OEM part restores the precise ignition timing these engines depend on.
Part Details
| Part Number | 98079-5487V |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Spark Plug (ZGR4A) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EB11000 | All |
| Horizontal Shaft Engine | GX610, GX620, GX670 | All |
| Vertical Shaft Engine | GXV610, GXV620, GXV670 | 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.
