Stihl 290 chainsaw quits

Discussion in 'Mechanic and Repair' started by Jerry and Sons, Oct 6, 2005.

  1. Jerry and Sons

    Jerry and Sons LawnSite Member
    from Pa
    Messages: 249

    Whne the saw is running wide open everly thing is fine, but as soon as a remove full throttle it dies. Once it dies it is a real bithc to get started. Any suggestions?
  2. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Well, I'm not the two stroke joke where I work but you could start with the easy things first. check the fuel filter, Air filter, Muffler for carbon build-up (partly plugged) and the spark plug. If all is fine the next step would be the carb.
    Maybe this will help a little.
    Good luck
  3. joe stihl

    joe stihl LawnSite Member
    Messages: 35

    Chances are it is in the carberator. Might be the fuel line (notorious for cracking just above the tank.) Also, might be one of the oil seals is leaking air. This will cause the rpms to vary alot at wide open throttle and it will not idle.
  4. Lawn Masters

    Lawn Masters LawnSite Senior Member
    Messages: 850

    its possible that the carb is just a little gummed up, and wont supply enough fuel to keep it going at idle, or the fuel line is cracked, as has been said. an oil seal isnt very likely since it runs fairly well at full throttle. if it makes a slight 4 cycling sound at fulll throttle the carb is correctly set, but if its just SCREAMING along, its too lean, and would be evidence of something definately not right.
  5. Grassmechanic

    Grassmechanic LawnSite Silver Member
    Messages: 2,697

    It's junk. Send it to me. I'll take it off your hands. :waving:
  6. Brianslawn

    Brianslawn LawnSite Silver Member
    Messages: 2,004

    yeah.... or else just adjust the idle speed screw
  7. o-so-n-so

    o-so-n-so LawnSite Bronze Member
    from Alabama
    Messages: 1,218

    I have a MS310 that does the same thing...really gets my blood pressure up. I have had it in 2 stihl shops and it is not right yet. I think its the crankshaft seal leaking through not allowing the carburetor to work correctly. Mechanic looks at me funny when I suggest that. :dizzy:

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