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Have a McCulloch 3818 chainsaw. when it warms up it wants to die and then after restart after restart after restart, it boggs down. Air filter is clean Spark plug is fine new gas hose cleaned carb

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  • dontbother10
    dontbother10 May 11, 2010

    Good answer roller. this may help: Carburetor Adjustment by Madsens.comhttp://www.madsens1.com/saw%20carb%20tun... CW is leaner; to lean will destroy the saw. If over tightened closed (CW) the adjustment screw faces are easily marred; marred adjustments are difficult to impossible to set properly. Clean the air filter; adjusting with a dirty filter can cause a run lean condition once cleaned and the saw run. There are 2 wav (sound - idle & full ? may not be highlighted) files that I find most helpful, I think you will too. Lou

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Had this problem with my saw (3818) there are two adjustment screws on the side of the carb there is a hole in the plastic to get to them just fwd of the choke slide, not the idle adjustment which is farther fwd of the other. take a 1/8" flat head screwdriver, get the saw running and turn them ever so slightly till you can get a good idle, they only have a 1/2 turn of adjustment each, it doesnt take much

Posted on Jan 14, 2010

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Let us try this again. Good answer roller, this should help:
Carburetor Adjustment by Madsens.com
http://www.madsens1.com/saw%20carb%20tune.htm
CW is leaner; to lean will destroy the saw. If over tightened closed (CW) the adjustment screw faces are easily marred; marred adjustments are difficult to impossible to set properly.
Clean the air filter; adjusting with a dirty filter can cause a run lean condition once cleaned and the saw run.

There are 2 wav (sound - idle & full – may not be highlighted) files that I find most helpful, I think you will too.
Lou

Posted on Jan 14, 2010

  • dontbother10
    dontbother10 Jan 14, 2010

    I feel like a trout roller. Please look at the date, this one a year old. LOL

    Lou

    Still a good answer.

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Get a compression gage and see if the compression is to specifications. May two stroke cycle engines wear quickly due to the light oil ratio we presently use on them. 

Posted on Jan 31, 2009

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