1990 Johnson 115 4v

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Chris Bowen

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Feb 22, 2024
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Im about to loose my mind. Motor at the beginning of the day runs absolutely fine. Wide open is great everything is great. But when I shut it off and fish for just a few minutes the motor won't idle. It will start but sounds terrible.. like it's bubbling under water ( not the normal sound) and no power... if I let it run for a minute with some throttle... I can sometimes get power back sometimes I can't and it runs terrible the rest of the day. Get it out of the water and it fires right up.. all compression is the same on all cylinders. New plugs, new lines, new fuel filter. But today I noticed a black soot on one side of the motor just under the motor about 1/4 down the shaft. I'm out of ideas
 

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