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1998 Johnson 150 leaking 2 cycle oil from carbs

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  • 1998 Johnson 150 leaking 2 cycle oil from carbs

    I have a 1998 Johnson 150 which is pouring 2 cycle oil from the carbs and the lower carbs are the worst. What is causing this problem?

  • #2
    my 250 does the same thing,was told its probably check valve for vent.my tank holds pressure during hot weather.

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    • #3
      That may be the problem. Yesterday I talked to a boat mechanic who told me the same thing.

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      • #4
        I have same problem with my 97 Johnson 200 ocean runner
        today I took the oil hose off the motor because I was trying to replace my inline fuel filter and oil spilled out the whole time till I pluged it.
        where is this valve and is it something I should be worried about
        thank john

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        • #5
          Mine does not have any kind of valve but has a hole in the center of the cap on the oil tank that lets the tank vent. I cleaned mine but it did not seem to be stopped up.

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