hello everyone.could any one tell me whats the correct spark plug for my newly acquired 1972 evinrude 9.5 sport twin, no.9223m c68850.many thanks.carl
<br /><br />I recommend Champion J4C for high speed running or all-round, J6C for extended idling or trolling.<br /><br />Gap at .030". If you get a lot of fouling open it up to .040"<br /><br />Good luck. 
