Champion Spark Plug 4Pack #24QL16VFor 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 Qtype 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... More