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Firestone

Firestone spark plug

Champion Spark Plugs for Firestone Outboard Motors

Champion spark plugs are original equipment on many outboard and inboard motors and are excellent replacements for everyday engine maintenance. Please view the application guide below. You may also find the Champion spark plug code helpful.

Year Model / Engine Copper Plus Plug Alternate Plug Gap
30 HP
1962-1960   RH12 H12 0.03
25 HP
1962-1960   RH12 H12 0.03
12 HP
1962-1960   RH12 H12 0.03
8 HP
1962-1960   RH12 H12 0.03
7.5 HP
1962-1960   RH12 H12 0.03
2 HP
1962-1960   RH12 H12 0.03
1966 Featherweight 5 RJ12C J11C 0.03