dies on full open choke?

Discussion in 'Mechanic and Repair' started by d.m.d., Apr 3, 2007.

  1. d.m.d.

    d.m.d. LawnSite Member
    Posts: 72

    i have a couple craftsman string trimmers that start good but only run half way decent at half choke.even when warm if you pull the choke completely off the things will bog down and die.i know they are junk but i want to run them till they are dead then i will go get a stihl or echo.any ideas on this problem?
  2. razor1

    razor1 LawnSite Bronze Member
    Posts: 1,985

    If you haven't yet, remove the screen from inside the muffler. When they clog it won't run. And of course, new plug and tune the carb.
    Good Luck
  3. d.m.d.

    d.m.d. LawnSite Member
    Posts: 72

    has new plug.i just went out and took the muffler off and its a nice little box.its self comtained and just short of cutting it in half it doesnt come apart.it looked pretty clean actually.......
  4. khouse

    khouse LawnSite Bronze Member
    Posts: 1,465

    Were the x ports clean? Sounds like a carb rebuild or replacement is in order. Maybe time to look for that commercial unit?
  5. puddin' pie

    puddin' pie LawnSite Member
    Posts: 95

    what about the air breather is it clean. doesn't sound like enough air is getting through
  6. d.m.d.

    d.m.d. LawnSite Member
    Posts: 72

    filter is clean,fresh gas also.ill probably get a new echo.i will say my old craftsman stuff has paid for itself.and my leaf blower has amazed me,that thing had the hell used ot of it last fall on leaves.id run it dry fill it up and go again but they dont push enough air...........thanks for all responses.
  7. topsites

    topsites LawnSite Fanatic
    Posts: 21,653

    The only thing left I can think of is a compression test, or possibly the coil.
  8. lawnspecialties

    lawnspecialties LawnSite Silver Member
    Posts: 2,513

    Check your primer bulb for cracks.

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