Champion Spark Plugs Spark Plug 821M @4 L77JC4

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    Champion Spark Plug Each #24-L77JC4 For all brands of marine engines. 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

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