Re: 1972 50 HP Johnson idle mixture adjustment
Replace plugs every 80hours or so,and it's normal.<br />I would turn it clockwise 1/4turn, and see if the performance stays the same. If so, great. Your fuel economy should pick up a bit too. <br />If so, try another 1/4turn in,but be suure to wait about 30 seconds between the two adjustments. But if it seems slugish at all, return it to 1-3/4 turns.It's best to burn rich, fouling the occasional plug and smoking a bit, than to score the jugs from lack of lubrication due to a lean condition.
