Q: It starts up wide open with the trigger depress fully but when I release the trigger it dies.
A: The carburetor idle jet (Picture A item #27) is dirty/plugged. the carburetor needs to be taken apart and cleaned or it just needs to be turned out a bit to flow fuel or the idle screw that sets the idle speed (Picture B) on the carburetor need to be screwed in to open the flap a bit more. Your carburetor may not be like either of these two carburetors but close enough. If you need to figure out which carburetor you have to locate the idle jet look search for picture of your carburetor and that tells all such as in picture A.
Another couple things. In picture B you see the spring on the throttle shaft that closes the flap to idle. If that area is really dirty the flap could be stuck wide open. Make sure the it is free to open and close. If the chainsaw has had a lot of use the engine could be wore to the point at idle the piston isn't making enough compression for the engine to stay running even if you turn the idle speed screw (Picture B) in as far as you can.
thank you Falcon 52, it was a small twig that somehow made it from the branch thru the filter system, almost all the way down the throat of the carb and lodged under the throttle plate. How ? i haven't a clue ! but again thanks a lot .thank you Falcon 52, it was a small twig that somehow made it from the branch thru the filter system, almost all the way down the throat of the carb and lodged under the throttle plate. How ? i haven't a clue ! but again thanks a lot .
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Your question isn't detail enough such as.
Q: It starts up wide open with the trigger depress fully but when I release the trigger it dies.
A: The carburetor idle jet (Picture A item #27) is dirty/plugged. the carburetor needs to be taken apart and cleaned or it just needs to be turned out a bit to flow fuel or the idle screw that sets the idle speed (Picture B) on the carburetor need to be screwed in to open the flap a bit more. Your carburetor may not be like either of these two carburetors but close enough. If you need to figure out which carburetor you have to locate the idle jet look search for picture of your carburetor and that tells all such as in picture A.
Another couple things. In picture B you see the spring on the throttle shaft that closes the flap to idle. If that area is really dirty the flap could be stuck wide open. Make sure the it is free to open and close. If the chainsaw has had a lot of use the engine could be wore to the point at idle the piston isn't making enough compression for the engine to stay running even if you turn the idle speed screw (Picture B) in as far as you can.
thank you Falcon 52, it was a small twig that somehow made it from the branch thru the filter system, almost all the way down the throat of the carb and lodged under the throttle plate. How ? i haven't a clue ! but again thanks a lot
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