B7HS10 NGK spark plug which is one of the largest suppliers in the world in regard to spark plugs for marine applications. Yamaha recommends NGK spark plugs as original equipment. The cold rolled son NGK help prevent blockage of the spark plugs, even over the heads of aluminum and salt water. In addition, the metal-plated coating of zinc chromate dual immersion NGK spark plug makes it extremely strong corrosion resistance, even in harsh environments such as saline environments.
