Description
Overview:
The Genuine NGK Spark Plug No. MAR9A-J (MPN 6869) is a high-quality ignition component for petrol engines used across construction and garden machinery. Built with a corrosion-resistant steel shell, a ribbed ceramic insulator for high dielectric strength, and precisely finished electrodes, it generates a consistent spark to ignite the air-fuel mixture. This supports easy starting, stable idling, and efficient running under load. Suitable for equipment such as lawn mowers and generators, as well as contractor tools like plate compactors and cut-off saws, where the engine manufacturer specifies this code. As a genuine NGK part, it offers dependable OEM performance and is supplied individually, making it straightforward to replace a single fouled plug or service multiple cylinders as required.
Key Features:
- Genuine NGK OEM quality part; code MAR9A-J, stock number 6869.
- Resistor type (R) to suppress electromagnetic interference with electrics and instruments.
- Durable build with corrosion-resistant shell and robust ceramic insulator for long service life.
- Consistent spark for reliable cold starting, smooth idle, and clean combustion.
- Helps minimise fouling and misfire when used with correct fuel mix and service intervals.
- Factory pre-set gap; check and adjust to your engine specification before fitting.
- Direct replacement where MAR9A-J is specified; straightforward installation with a suitable plug socket.
- Sold individually to match the number of cylinders or plugs being serviced.
Typical Applications:
For petrol-powered equipment in workshops, sites, and gardens, including generators, lawn mowers, ride-on mowers, brushcutters, hedge trimmers, scarifiers, water pumps, pressure washers, compactors, and cut-off saws. Suitable for both 2-stroke and 4-stroke engines where the manufacturer lists MAR9A-J. Ideal for routine servicing to restore easy starting and consistent performance.
Also known as:
Resistor spark plug, igniter plug, engine ignition plug, spark igniter, ignition electrode, petrol engine plug.
Product Specifications
| L&S Part No. | MAR9A-J |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | NGK |
| OEM No. | 6869 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | NGK |
| Key Features | - Genuine NGK OEM quality part; code MAR9A-J, stock number 6869 - Resistor type suppresses electromagnetic interference - Corrosion-resistant steel shell for long service life - Consistent spark ensures reliable cold starting - Direct replacement where MAR9A-J is specified |
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