Mercury Marine NGK IZFR5J Laser Iridium Spark Plug

The NGK ceramic insulator delivers strong heat transfer and durability, while the ribbed suppressor seal helps prevent misfires and flashover. Easy installation with standard spark‑plug sockets. IZFR5J spark plugs come pre‑gapped to factory specs for your engine. Always use the plug recommended in your owner’s manual to maintain peak performance and fuel efficiency.

Features

• NGK fine wire tipped center electrode Laser Iridium Spark Plugs deliver slow wear rate, stable idle, superior anti-fouling, improved fuel efficiency and lower emissions
• Check your engine owner’s manual for the correct spark plug and use only the plug as recommended by your engine’s original equipment manufacturer
• NGK Trivalent metal plating also provides superior anti-corrosion in the marine environment and anti-seizing for easier removal
• Replace all the engine plugs at the same time
• Longer service life with a copper core and ribbed suppressor seal for durability and performance

Product availability varies between locations, and some products are only available online. Please contact your nearest Martin Motor Sports here for availability.