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1975 9.9 johnson fuel bulb issue.

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  • 1975 9.9 johnson fuel bulb issue.

    1975 9.9 johnson . This motor looks really nice for its age it has 100+ on both cylinders and pretty good spark. Any the carb was a mess I cleaned it up really well blew out all the ports real good cleaning. Anyhow the problem is when I pump the bulb from the tank I can't even get half a pump and it hard as a rock. I took the gas line off at the carb and it pumps fuel clean through but the second you put it on the carb it stiff again ???? Any ideas

  • #2
    Re: 1975 9.9 johnson fuel bulb issue.

    Inlet blocked,

    Needle valve stuck shut ....... clip between needle and float arm not fitted.

    Float not dropping

    Float incorrectly adjusted , or fitted ???

    Or the bowl is already full and you don't realise it.

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    • #3
      Re: 1975 9.9 johnson fuel bulb issue.

      float in upside down?
      many men fish for years without ever knowing its not about catching one.

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      • #4
        Re: 1975 9.9 johnson fuel bulb issue.

        Take the carb off again. You may have some crap underneath the needle and seat.

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        • #5
          Re: 1975 9.9 johnson fuel bulb issue.

          second that. Disassemble the carb again, and soak everything overnight. Remove jets or at least make sure that they get a good soaking and cleaned with a wire. One of the recent suggestions here was to use PineSol for soaking, and that's what I'm going to try for my next carb cleaning -- might give that a try. (And it IS possible to install the float upside down, as in NWCoves post.)

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          • #6
            Re: 1975 9.9 johnson fuel bulb issue.

            Took it apart again the bowl was full of gas but it looked nasty. I also took apart the fuel pump pretty rough there to. So I will be ordering a fuel pump and soaking the carb + ordering a new float assembly. Then I'll get back with ya on what happens next. New fuel lines to . Thanks for the help.

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            • #7
              Re: 1975 9.9 johnson fuel bulb issue.

              think I would at least switch out the existing gas in the tank -- maybe replace the tank. If you are running with a metal tank, those nasties may be coming from the bottom of the tank. The plastic ones are probably better in that way.

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              • #8
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                Re: 1975 9.9 johnson fuel bulb issue.

                No metal tank ,gotta have a new fuel pump, carb kit , and float then I'll get back to her.

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