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  1. #1

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    Angry mccullock 32cc line trimmer why wont the primer work!

    Primer ball on my mccullock line trimmer will not pull gas from other side of the carb.. i really dont like the design and im not sure i fully understand how it actually works.. primer ball on the return side of the fuel route.20170730_165945.jpg20170730_165955.jpg20170730_170013.jpg

  2. #2

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    Boudreaux In Eunice La.'s Avatar
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    Re: mccullock 32cc line trimmer why wont the primer work!

    Several things can cause that.........

    A bad bulb... Which yours looks new. Or a wrong fuel line configuration. It is easy to hook them up wrong. I did it a couple times myself.

    A carb that is not cleaned well can do that do that because the passages or not letting the air and gas through them....

  3. #3

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    Re: mccullock 32cc line trimmer why wont the primer work!

    Two questions. When you press the bulb and let go does the bulb stay pushed in. The second question is if the bulb comes back out can you hear what sounds like air being sucked from the center of the carb were the butterflies are when you pump the bulb. .
    ILLINOIS ENGINE, BEECHER CITY, IL
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  4. #4

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    Re: mccullock 32cc line trimmer why wont the primer work!

    You might also check to see that your fuel pickup filter is not clogged.

  5. #5
    Boobala's Avatar
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    Re: mccullock 32cc line trimmer why wont the primer work!

    Quote Originally Posted by Ronno6 View Post
    You might also check to see that your fuel pickup filter is not clogged.
    This might be helpful ...

    http://www.ereplacementparts.com/art...e_Engines.html


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  6. #6

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    Re: mccullock 32cc line trimmer why wont the primer work!

    Question to Ilengine,

    I have an Echo chainsaw that I converted to model airplane use. It refused to start after removing the engine from the saw.
    I replaced the original carb with a Walbro off a Ryobi and it starts and runs fine. The "primer bulb" was labeled "purge valve" on the saw. I'm thinking the "purge valve" bleeds any air out of the carb, is this thinking correct?

    Jeff

  7. #7
    BlazNT's Avatar
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    Re: mccullock 32cc line trimmer why wont the primer work!

    Yes, a purge bulb removes air from the fuel line to the carb.
    Chuck
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