A genuine Japanese standard fitting NGK Spark Plug for Mariner, Yamaha, Suzuki, Mercury, Selva and Honda marine engines. A pure alumina silicate ceramic insulator provides superior strength and heat transfer, whilst a copper core aids heat removal. Corrugated ribs prevent flashover and triple seals prevent leakage.
Spark plugs are a vital component of your marine engine ignition system, as they supply the spark that ignites a mixture of air and fuel within the cylinders of your engine, thus creating a combustion that makes your engine operation.
Champion Correspondences: QL78C.
Thread Diameter: 14mm.
Thread Pitch: 1.25mm.
Hex Size: 21mm.
Seat Type: Gasket.
Terminal Type: Removable Nut.
Resistor Value: 5K Ohm.
Heat Range: 8.
Torque Specs: Cast Iron: 18-25.3lb, ft Aluminium 18-21.6lb ft.
Longevity: 30,000 miles.
Mariner, Yamaha, Suzuki, Mercury, Selva and Honda.
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