The Honda 98079-5585V Spark Plug (J16CR-U) is a genuine OEM ignition component designed for Honda GX610, GX620, GX670, GXV610, GXV620, GXV670 horizontal and vertical shaft engines, and the EB11000 generator. As a direct Honda OEM part, this spark plug is manufactured to the same specification as the plug originally installed at the factory, ensuring the correct heat range, electrode geometry, and thread pitch for these engines. Verify your engine's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and coverage may vary by production range.
Key Features
- Correct Heat Range for These Engines — the J16CR-U designation specifies the exact thermal rating Honda engineers selected for the GX610, GX620, GX670, GXV610, GXV620, GXV670, and EB11000; running the wrong heat range risks fouling or pre-ignition.
- Genuine OEM Construction — sourced directly from Honda, this plug meets the same electrode gap, insulator grade, and shell dimensions as the original, so it threads in and seats without modification.
- Broad Fitment Across Honda's Large-Displacement Line — listed for Honda's twin-cylinder GX and GXV 610–670 cc engine families as well as the EB11000 generator; check the fitment table to confirm your specific serial range.
- Ignition Reliability — a fresh spark plug at the correct specification restores clean ignition across the full rpm range; a worn or fouled plug causes hard starting, misfires, and increased fuel consumption in these large-displacement engines.
A spark plug ignites the compressed air-fuel mixture inside each cylinder, producing the combustion event that drives the piston and generates power. In a large-displacement twin-cylinder engine like the GX620 or GXV670, consistent spark from both cylinders is essential for smooth power delivery and efficient fuel use. When a spark plug wears, its electrode gap widens and the insulator degrades, weakening the spark and leading to misfires, rough running, difficulty starting, and higher fuel consumption — making periodic replacement a straightforward way to keep these engines performing at full output.
Part Details
| Part Number | 98079-5585V |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Spark Plug (J16CR-U) |
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.
