What octane is best to run in a 1993 90HP Johnson? Would 93 octane improve its performance or hurt the engine. I know in other two cycle engines, such as dirt bikes, the higher octance enhances performance.<br /><br />Thanks.
I recently purchased a 1993 90HP Johnson outboard. The motor has very low hours on it and it has not been run in approximatley three years. Before taking it out for the first time I took it to my local repiar shop to have them look over it and do a general tune-up. The repair shop changed the...
