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: 1mm.

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: 6.
Torque Specs: Cast Iron: 18-25.3lb, ft Aluminium 18-21.6lb ft.
Longevity: 30,000 miles.

NGK Spark Plug BPR6HS-10 is suitable for the following models of marine engines:

Outboards:
Marinepower: 2.5HP 2Stroke, 3.3HP 2 Stroke.
Mariner: 2.5HP 2.5 1990-2000, 3.3HP 3.3 1993-2000.
Mercury: 2.2HP 2.2 1984-1994, 2.5HP 2.5 1990, 3HP 3 1990-1994, 3.3HP 3.3 1993.
Nissan: NS2.5A For CDN, NS3.5A For CDN, NS3.5A2 3.5 HP 2007.
Tohatsu: M2.5A/A2, M3.5A/A2, M3.5B/B2.
Yamaha: 3A(3).