problem with chain saw

Discussion in 'Mechanic and Repair' started by maxwilbryan, May 22, 2008.

  1. maxwilbryan

    maxwilbryan LawnSite Member
    Messages: 78

    It's a sthil-fairly new. It'll run great for 30 seconds then lose its motivation and cough out. Seems like a fuel thing. Im mixing 50-1. It isnt smoking at all. Would appreciate some hel gentlemen. Thanks.
  2. Turfrific

    Turfrific LawnSite Member
    Messages: 180

    mix 36-1 sounds like it could be a choke problem too or dirty.
  3. mowermankevin

    mowermankevin LawnSite Senior Member
    Messages: 270

    Max, a model # always helps, just got done with a 024AV having the same problem, belongs to a homeowner, not real mechanical, but a computer whiz, he sure got this laptop to speed-up, we're all good at something, not so good at others. Anyhow, pulled the top cover off, pulled the sparkplug(gapped@ .015, opened to .035, it was carboned up, not too bad, cleaned it and reinstalled. Next pulled the air cleaner cover and the air cleaner and cleaned those, cleaned the area around the carb and fuel lines,(had a lot of problems with pin hole leaks in Stihl fuel lines even when (supposedly) new.Next drained out old fuel and put in fresh, cleaned everything some more with carb cleaner and blowgun, held the trigger open, gave it a shot of spray lube and starting fluid and it popped right off. Thought maybe it was a fuel line problem but not this time. Sometimes small engines just need help getting started, sometimes I have to do this half a dozen times to keep'em going, but it beats spending a couple of hours tearing a carb down and putting it back together,

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