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.

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.

Technical Specifications:

Shell:
Thread Diameter: 14mm.
Thread Pitch: 1.25mm.
Hex Size: 21mm.
Reach: 12.7mm.
Seat Type: Gasket.
Terminal Type: Removable Nut.
Gap: 0.7mm.

Centre Electrode:
Material: Nickel.
Type: Standard.
Size: 2.5mm.
Projection: Projected.

Ground Electrode:
Material: Nickel.
Type: Standard.

Specifications:
Resistor: Yes.
Resistor Value: 5K Ohm.
Heat Range: 8.
Torque Specs: Cast Iron: 18-25.3lb, ft Aluminium 18-21.6lb ft.
Longevity: 30,000 miles.

NGK Spark Plug BPR6HS is suitable for the following models of marine engines:

Outboards:
Evinrude: 2HP 1991-1998, 2.3HP 1991-1997, 3.3HP 1991-1998, 115HP LV4 1995, 300HP 1994-1995.
Force (US Marine): 5HP 1999, 9.9HP 1999, 15HP 1999, 25HP 1999.
Johnson: 2HP 1-cly. 1991-1999, 2.3HP 1991-1995, 3.3HP 1-cly. 1991-1999, 120HP 1991-1994, 200HP 1992-1995, 300HP 1994-1995.
Spirit: 3.5HP Spirit 3.5, 4.5HP Spirit 4.5, 5HP Spirit 5.
Suzuki: DT5 1993-1994, DT8.