A spark plug seals the combustion chamber. It conducts a spark that is generated in the ignition coil into the combustion chamber and provides a gap for that spark to jump across. Finally, it conducts the heat it picks up in the combustion process to the cylinder head and into the cooling system. Since 1936, NGK has built itself to be the world's leading spark plug manufacturer. NGK's spark plugs have a triple-gasket sealing process which helps them to withstand the roughest ride. A solid copper core increases spark and heat transfer and the longer insulating nose prevents fouling. The double dipped zinc-chromate shells resists corrosion and rusting.
Over time jet ski spark plugs can deteriorate from producing the spark. When this happens, it changes the spark plug gap causing irregular spark and missing. You don't have to wait to change your plugs. When you do change them, however, wait for the engine to be cold. Do notchange them when the engine is hot or warm because it could cause you to cross thread it by putting a cold spark plug in an heated up expanded hole.
2003 FX Cruiser
2004 FX 140
2004 FX Cruiser
2004 FX Cruiser HO
2004 FX HO
2005 FX 140
2005 FX Cruiser
2005 FX Cruiser HO
2005 FX HO
2005 VX Deluxe
2005 VX Sport
2006 FX 140
2006 FX Cruiser
2006 FX Cruiser HO
2006 FX HO
2006 VX Deluxe
2006 VX Sport
2007 FX 140
2007 FX Cruiser
2007 FX Cruiser HO
2007 FX HO
2007 VX Deluxe
2007 VX Sport
2008 FX 140
2008 FX Cruiser
2008 FX Cruiser HO
2008 FX HO
2008 VX Deluxe
2008 VX Sport
2005 AR 230 HO
2005 SX 230 HO
2006 AR 230 HO
2006 SX 230 HO
