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  1. J

    1990 70hp johnson no spark

    I have a 1990 70 johnson that just lost spark on all three cylinders. I started it on muffs to make sure it was gonna run,anyhow i let it warm up then shut it off. I came back about 20 mins later and turned the key and i got one loud backfire out of the exhaust and it hasnt fired a spark plug...
  2. J

    70 johnson carb adjustment

    ive got a 1990 70 johnson. When i turn the idle mixture srew out does that richen or lean the mixture. Its hard to tell while adjusting them. my carbs are about 1 1/2 turns out engine idles good but smells really rich and plugs are black. i know alittle rich is better than lean but i don't...
  3. J

    carb issues

    ive got a 1990 johnson 70 hp. ive rebuilt carbs and they are still leaking gas out of the venturies. it stil runs good until it gets warm and then it doesnt want to idle. ive taken carbs back off and rechecked float level and all is well. im not sure where to go from here. it doesnt leak...
  4. J

    carb problems on a 1990 70 johnson

    I bought a 1990 70 Johnson and the Carb bowls were leaking so I got three OEM kits and rebuilt carbs. Put them back on and it run like a dream. The next morning I tried to start it and engine was turning over very slow and all three carbs are flooding and leaking out of throttle body. I'm very...
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