Marine Spark Plug 592C/RJ12C
Champions traditional plugs are all constructed with a corrosion resistant zinc plated shell. Resistor plugs have the most durable high voltage semiconductor while marine application use a special wire wound Q-type suppressor (CDI resistor) when noted. Copper core ground or center electrode (when noted). Conforms to all I.S.O. and S.A.E standards as specified by all manufacturers..