my chainsaw was working perfectly then yesterday just kept stalling and had to constantly fiddle with choke to keep it going. how to cure? or is it timing?

chris, November 2009

It is not timing, the symptoms you describe are fuel starvation, check for dirty or stale fuel in the tank, check for blocked fuel filter in tank, remove carb and check filter screen in the pump side of the carb ( cover held with one philips head screw ) richen the L screw on the carb, 1/4 turn anti clockwise.

Husqvarna man, November 2009