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  1. #1

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    Checking check valves

    So my accelerator pump diaphragm is ok,but no fuel out the carb fittings any ideas for checking the carb outlets?


  2. #2
    casey67's Avatar
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    Hand held Vacuum pump or using your mouth.
    The outlet fittings need to allow pressure pushing out , but need to close and seal allowing suction/vacuum .
    There are small check balls inside those check valves. There is also a check ball/valve at the other end in the jet block-that works to allow fuel into the pump and seals so that pressure goes into the hoses.

    The check valves work together to make the pump squirt possible. Actually working opposite of each other ( when one is closed-other is open and vice versa ).

  3. #3

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    Thx Casey,will like and prod some more!

  4. #4

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    Took hard pressure from this to shift them,is that right?
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  5. #5
    casey67's Avatar
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    What do you mean by "shift them" ?


    With vacuum/suction where the hose attachs-it should not leak-can not suck.

    If that is a positive pressure pump (blows), it should push or blow through easily.

  6. #6

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    Took hard pressure on the pump to blow air through,can these check valves be cleaned or can you change the springs?

  7. #7
    casey67's Avatar
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    Hmmmm… usually they don't seal. They are a soft metal.. brass??. and pressed together. So they can be taken apart and cleaned.
    I don't see any reason to change the spring-I'm guessing dirt/corrosion is keeping it from moving easily.

    Are there any cheap carbs for sale near you ? Pretty sure all the squirters are the same.

  8. #8

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    Thx again for the reply,I'm in the UK parts are getting brate,but I shall take apart and clean,then take it from there.

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