Spark Plugs & Ignition

Spark plugs in the heat ranges and reaches outboards and sterndrives actually call for, from NGK and Champion, plus Sierra ignition coils, points, condensers and tune-up kits for MerCruiser, OMC and Johnson/Evinrude. Plug part numbers are in the title; match them to the number on the plug you pulled, not the engine year alone.