NGK is one of the largest suppliers of spark plugs for marine applications in the world. Companies that include Honda, Mercury Marine, OMC, Suzuki, Tohatsu and Yamaha all specify NGK Spark Plugs as Original Equipment.
NGK produces spark plugs for almost every application, from outboards to stern drives, from small trolling motors to highly modified V8s.
NGK's cold-rolled threads help prevent spark plugs from seizing, even in aluminum heads or salt water conditions. And NGK's double-dipped zinc chromate coated metal shell makes them very corrosion resistant, even in harsh salt water environments.