Re: please help timing 1988 johnson 150 vro
Yes, yours is the base engine, based on the model number. Keep in mind the ignition system on this engine will creep (continue to advance) the timing as the rpm's increase. Could be up to 3-4 degrees timing creep from idle to 5000 rpm's. So, make sure when you are setting wot timing, that you account for the creep. That's why the manual says to set it at 5000 rpm's. If you set max timing at idle, you'll be 3-4 degrees high @ 5000 rpm's.