Ignition System

Indmar Marine Spark Plug – 5.7L Standard | Non-Catalysed Exhaust System | Part #491008 Keep your Indmar 5.7L firing on all cylinders with this genuine Indmar standard specification spark plug, designed for engines fitted with a non-catalysed exhaust system. Spark plugs are one of the most fundamental tune-up items on any engine — and on a marine engine running hard all summer they deserve the same attention as your impeller and oil filter. Fresh plugs mean reliable starts, smooth power delivery, and optimal fuel efficiency every time you hit the water. Compatible with: Indmar 5.7L marine engines with non-catalysed exhaust systems fitted to Malibu, Moomba, Supra, MB, Mastercraft and Tige boats. Contact us to verify fitment for your specific model year

Indmar Marine Spark Plug Kit – 5.7L Iridium | Catalyst Exhaust Engine | Part #491009 Upgrade your ignition system with this genuine Indmar iridium spark plug kit, specifically designed for Indmar 5.7L engines fitted with a catalyst exhaust system. Iridium plugs represent the pinnacle of spark plug technology — delivering stronger, more consistent sparks, longer service life, and measurably better performance compared to standard plugs. If you want the best ignition performance from your catalyst-equipped Indmar 5.7L — iridium is the answer. Compatible with: Indmar 5.7L marine engines fitted with catalyst exhaust systems on Malibu, Moomba, Supra, and Tige boats. Contact us to verify fitment for your specific model year