Mercury – Quicksilver NGK IZFR6J Laser Iridium Spark Plug | Marine Ignition Component | Sold Individually | 843220Q MerCruiser-4-5L-MPI-Alpha-2012 A new seal restores a

A new seal restores a tight connection

A quick visual inspection a few times a season will tell you everything you need to know about their condition

Aftermarket blends may promise compatibility

Q: What are signs an idle gear may be worn or damaged

Mercury – Quicksilver NGK IZFR6J Laser Iridium Spark Plug | Marine Ignition Component | Sold Individually | 843220Q MerCruiser-4-5L-MPI-Alpha-2012 A new seal restores aMercury Quicksilver NGK IZFR6J Laser Iridium Spark Plug Marine Ignition Component Sold Individually 843220Q Overview The Quicksilver 843220Q NGK IZFR6J Laser Iridium Spark Plug is built to give your Mercury outboard dependable starts, smooth power, and long service life. Its the same high quality plug trusted by Mercury Marine for factory performance, designed to handle the heat and vibration of real world boating. Each plug comes pre gapped and ready