Weedwhacker motor, runs for a while then quits

Discussion in '2-Stroke Engines' started by skyl4rk, Aug 17, 2008.

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  1. skyl4rk

    skyl4rk Guest

    I am trying to get an old weedwhacker motor running for conversion to a motored bike. It is still in the old weedwhacker frame. I can get it to run after it sits for a while and it will run well for less than a minute, then it just quits. I thought it was the carb so I bought a new one. After replacing the carb, it still does the same thing.

    What would you do next to try to fix it? Maybe a new fuel line and filter? I have seen fuel running out of the fuel line, there does not seem to be an obstruction.

    The motor is running rich right now. I will adjust the idle once I can keep it going for a couple of minutes. Could that be the problem?

    Also, the carb has two gas line connections. I am thinking one is the return line, which I do not need for the weedwhacker set up. I am just plugging the return line.

    Any suggestions appreciated.

  2. Mountainman

    Mountainman Active Member

    I was going to say - fuel carb problem - same problem with new carb - like you say - return line ? Sure sounds like a fuel problem - although maybe condenser or coil - when slightly heated - shorting out ?? Let us know ok ? Happy Riding from - Mountainman
  3. jboisclair

    jboisclair Member

    Yeah my weedwhacker does this also runs for a little then dies. Now its at the point where it will barely start up. Although there are a lot of bubbles in my gas line.
  4. Ahhh.
    the old weed whacker on the Bike Build..

    Did it !.
    It was a while back ..Cant even remember How i did it anymore..LOL

    before pulling all your hair out Do yourself a favor .
    Try taking off the muffler and drilling a few holes In the baffle area.
    It seems the little mufflers Get clogged up after some usage.

    good luck.


  5. s_beaudry

    s_beaudry Member

    Had the same problem with my troy built weed wacker engine...

    The return line to the tank had hairlines cracks in it, it ran for a minute or so, then died out, prime it and same thing again....

    Check your lines to and from