The Spark Plug BR9HS-10 (86-4551) provides greater ignitability, increased throttle response, and superior anti-fouling for the performance enthusiast. The laser-welded small Iridium tip ensures...
If you had difficulty starting the engine, lost engine power, or experienced decreased acceleration, your boat's spark plugs may be failing or in poor condition. Invest in a high-quality spark plug...
Most people don't give their spark plugs a second thought, even though they are vital to your vehicle's performance. Your vehicle would most likely not be able to function at all if the spark plugs...