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: 7.
Torque Specs: Cast Iron: 18-25.3lb, ft Aluminium 18-21.6lb ft.
Longevity: 30,000 miles.

NGK Spark Plug BPR7HS-10 is suitable for the following models of marine engines:

Outboards:
Evinrude: 35HP Jet 1994-1997, 40HP2-cly. 1989-1998, 48HP 1989-1997, 48HP Spl 1994-1997, 50HP 2-cly. 1989-1998, 50HP 3-cly. 1995-1998, 55HP 2-cly. Com 1994-1995, 60HP 1994-1998, 65HP Com 1994-1995, 70HP 3-cly. 1994-1998, 90HP LV4 1995-1998, 105HP Jet 1993-1998, 120HP 1991-1997, 130HP 1991-1998, 140HP LV4 1985-1997, 150HP LV6 1991-1998, 150HP Com 1993-1998, 175HP LV6 1991-1998, 200HP LV6 1994-1998, 225HP 1994-1998, 300HP 1986-1997.

Johnson: 30HP Jet 2-cly. 1999, 40HP 2-cly. 1989-1999, 40HP Jet 3-cly. 1999, 50HP 2-cly. 1989-1999, 60HP 1994-1995, 70HP 3-cly. 1994-1999, 90HP LV4 1995-1999, 105HP Jet LV6 1993-1999, 115HP Fast Strike LV4 1995-1999, 130HP LV4 1985-1999, 150HP Fast Strike LV4 1995-1999175HP Fast Strike LV6 1991-1999, 225HP Venom LV6 1994-1999.

Marinepower: 4HP 2Stroke.

Mariner: 4HP 4(2-Stroke) 1990-2000, 5HP 5(2-Stroke) 1990-2000, 15HP 15(684) For CDN.

Mercury: 4HP 4(2-Stroke) 1988-1990 For CDN, EU, 4HP 4(2-Stroke) 1991, 5HP 5(2-Stroke) 1988-1990, 5HP 5(2-Stroke) 1991.

Nissan: NS5B For CDN, NS8B For CDN.

Suzuki: DT5Y 1998.

Tohatsu: M4C, M5B/BS, M5BS 5.0HP 2Stroke 2007, M6B, M8B, M9.8B, M25C2 25HP 2 Stroke.