Quicksilver 33-97389 Spark Plug NGK BPR6FSQuicksilver NGK BPR6FS standard plugs come pre-gapped as specified by your engine manufacturer. It is always recommended to check the gap before installation. Use only the spark plug listed in your engine owners manual. Using the wrong plug can reduce optimum performance, reduce fuel economy or cause damage to your engine. Spark plugs are easy to change with common spark plug sockets. The NGK pure alumina silicate ceramic insulator provides superior strength, reduces breakage and better heat transfer. The ribbed suppressor seal extends resistance and prevents spark flash over and misfire plus the triple seal helps prevent leakage.Applications:Fits MerCruiser 3.7L enginesNGK BPR6FS Standard plugs are pre-gapped to your engine manufacturers specificationsCheck your engine owners manual for the correct spark plug and use only the plug as recommended by your engines original equipment manufacturerNGK Trivalent metal plating also provides superior anti-corrosion in the marine environment and anti-seizing for easier removalThese NGK standard plugs feature a copper core to promote heat dissipation and more efficient spark plug operation and a solid terminal to ensure positive contact with spark plug wiresReplace all the engine plugs at the same timeMercury spark plugs are proven technology that offer reliable performance. Standard spark plugs are treated with corrosion-resistant plating to ensure ease of installation and removal. The solid copper core offers superior heat dissipation, conductivity and broad heat range. Mercury Standard plugs are an OE cornerstone that has provided decades of reliable performance.Part Number:BPR6FSStock Number: 2623Resistance (Ohm): 5000Ground configuration: StandardGround electrode core material: NickelCenter electrode core material: CopperCenter electrode tip material: NickelFitsI/O – 1979-1975 CHRYSLER, 1998-1972 CRUSADER, 2006 MERCRUISERCheck your engine and maintenance manual for the correct spark plug and only use as recommended by your engine’s original equipment manufacturer. Using the wrong plug can reducing optimum performance, reduce fuel economy or cause damage to your engine.