NGK B8HS-10 spark plug

The NGK B8HS-10 is a standard spark plug used in select marine, powersports, and small-engine applications. It is commonly chosen where the engine manufacturer specifies a B8HS-10 plug with the correct reach, heat range, terminal style, and preset gap.

Before ordering, confirm that NGK B8HS-10 matches your Yamaha model, engine family, and service manual specification. Spark plug fitment should always be verified by part number, not just appearance.

Standard spark plugs are chosen by more automotive, motorcycle and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.

• Triple gasket sealing process eliminates gas leakage past the shell
• 99% Highly pure alumina silicate insulator
• Solid copper core
• Corrugated ribs to prevent flash over
• Cold rolled threads to prevent damage to cylinder head
• Trivalent plating - silver chromate and zinc for corrosion resistance