Description
Overview:
The Genuine NGK ZGR5A Spark Plug (Manufacturer Part Number 5839) is a high-quality ignition component for petrol engines used in construction and garden machinery. Built with a corrosion‐resistant metal shell and a glazed ceramic insulator, it delivers a strong, consistent spark to ignite the air‐fuel mixture for dependable starting and smooth running. As an NGK resistor‐type plug, it helps reduce electrical interference. It is a direct replacement specified for selected Honda V‐twin engines, including GX610 K1 and GX620 K1, and is widely used in equipment such as generators, mowers, pumps, and compactors. Precision manufacture and controlled heat characteristics make it suitable for hard‐working engines that run for long hours. Supplied as a single plug for straightforward maintenance or one‐off replacement. This is a Genuine Part.
Key Features:
- Genuine NGK part, Manufacturer Part Number 5839
- Resistor type (R) to reduce radio-frequency interference
- Reliable ignition for easier cold and hot starts
- Consistent combustion for smoother idle and throttle response
- Durable construction for long service life in tough environments
- Corrosion-resistant shell and quality ceramic for stable heat dissipation
- Precision fit for the listed Honda GX/GXV V‐twin engines
- Easy to fit with a standard spark plug spanner
- Sold individually to match the exact quantity you need
- Helps maintain fuel efficiency and reduce misfires when serviced on schedule
Typical Applications:
Suitable for ride‐on and commercial lawn tractors, generators, water pumps, plate compactors, pressure washers, chippers, and other equipment fitted with compatible Honda GX and GXV V‐twin engines. Used by tradespeople, grounds care teams, hire fleets, and DIY users to restore reliable starting, stable idle, and clean running during routine services or when replacing a worn or fouled plug.
Also known as:
Ignition plug, spark igniter, engine igniter, ZGR5A engine plug, NGK 5839 plug, petrol engine plug.
Fits Models:
GX610 K1, GX610K1, GX620 K1, GX620K1, GX670, GX670 GCAM, GX670GCAM, GX670U, GX670U GCASK, GX670UGCASK, GXV610 K1, GXV610K1, GXV620 K1, GXV620K1, GXV670, GXV670 GJAH, GXV670GJAH, GXV670U, GXV670U GJAHK, GXV670UGJAHK
Alternate Part Numbers:
5839
Product Specifications
| L&S Part No. | ZGR5A |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | NGK |
| OEM No. | 5839 |
| Unit of Sale | 1 |
| Applications | GX610 K1, GX610K1, GX620 K1, GX620K1, GX670, GX670 GCAM, GX670GCAM, GX670U, GX670U GCASK, GX670UGCASK, GXV610 K1, GXV610K1, GXV620 K1, GXV620K1, GXV670, GXV670 GJAH, GXV670GJAH, GXV670U, GXV670U GJAHK, GXV670UGJAHK |
| Machine Type | Engines |
| Fits Brands | Honda, NGK |
| Fits Models | GX670 (GCAM) | GX670U (GCASK) | GXV670 (GJAH) | GXV670U (GJAHK) |
