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Help with this repair.

Discussion in 'Lawn Mowing' started by 1MajorTom, Mar 31, 2001.

  1. 1MajorTom

    1MajorTom Former Moderator
    Messages: 6,073

    A friend of the family has a piece of junk tiller and they asked Matt if he would be able to repair it for them.
    Matt, not knowing how to say NO, said sure, no problem.

    Well now, he has run into a problem.

    Here's the specifics. 3.5 Briggs, used one time, then sat for 3 years with fuel in it.
    Installed new spark plug, cleaned carb, installed new diaphragm gasket. Still won't start. The only time it will run is when Matt force feeds gas thru the carb. It will run as long as you keep putting gas in it.
    So he's assuming it is not getting gas from the tank to the carb.
    Help if you can, if not the 60 year old guy is going to have to till his garden by hand. Matt can care less at this point.
  2. awm

    awm LawnSite Gold Member
    Messages: 3,354

    The carb is going to need a new thingamadigy
    needle.Could need a whole new carb but probably not
  3. bob

    bob LawnSite Platinum Member
    from DE
    Messages: 4,260

    It's probably all gummed up. Tell the family friend that when he's done with the tiller, to put some fuel stabilizer in the tank and run it through the system.
  4. Yard

    Yard LawnSite Member
    Messages: 129

    Check the gas pick up tube. They tend to clog when left sitting. Good luck!
  5. klite

    klite LawnSite Member
    Messages: 72

    I would take the carb off and soak it in fresh gas with fule stabilizer mixed in, for a couple days. then blow thourouhly dry reinstall (make sure you put fresh gas in the tank with stabilizer mixed in(I yse all year long in my equipment)).If that doesnt work replace the carb.
  6. Chopper Lover

    Chopper Lover LawnSite Senior Member
    Messages: 288

    Hold your hand over the air intake and pull the cord hard a few times. Do you get gas on your hand? Probably not. Either their is blockage or you have an air leak.

    First, take the carb off the gas tank and remove the little pick up tube from the bottom.

    Second, shoot carb cleaner through it from both ends and shoot carb cleaner in any orifice you can find in the carb and see where it shoots out. This should blow out most any obstruction.

    Third, put it back together and place it back on the tank making sure you get a proper seal at the gasket. Air leaks will not allow you to pull the gas up from the tank.

    Forth, put some gas in it and do the hand test again.

    It should start after that...

    If that does not work try soaking it like mentioned in another post in this thread.
  7. Fantasy Lawns

    Fantasy Lawns LawnSite Bronze Member
    Messages: 1,912

    Not to seem silly ....but check the gas "shut off valve"
  8. thelawnguy

    thelawnguy LawnSite Silver Member
    Messages: 2,411

    What Yard said. Pull the pickup tube and replace.
  9. 1MajorTom

    1MajorTom Former Moderator
    Messages: 6,073

    Quote: Not to seem silly ....but check the gas "shut off valve"

    No fuel line, direct pick up from carb to tank.

    Pick up tube is clean as a whistle. Carb clean as a whistle.
    Any other suggestions?
  10. Mark

    Mark LawnSite Senior Member
    Messages: 723

    Needel valve is not working in carb. If you can pour gas into the carb and it runs,your just bypassing the needel. Sure you got all that gum and varnish off? Id replace the valve. Marks Mowing Service....ps does that have a primer bulb? My billygoat did this onece and was vaperlocked.

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