Engine stalls

Sound like the clutch is not disengging. The springs in it are likely week. Take note as to weather the chain stops when it is idleing. If it seem to idle at a reasonable speed and the chain does not stop turning, the clutch is most likely the problem. This problem can be caused by trying to work the saw without the throttle wide open. When the clutch slips it creates heat wich will over heat, and weeken the springs used to disengage the clutch. It is also possible that it was defective when new.