You probably got some dirt in your oil tank.Most saws have a screen or actual filter in the oil compartment-something like the fuel tank-I had same problem on my husky.I got mine going by draining all the oil out and flushing the tank with parts cleaner a couple times and blowing out the tank with compressed air,I also blew out the area around the chain and drive sprocket.If that doesnt work you will probably have to change the filter or screen in the tank.I was told about the in tank filter from my local stihl dealer.
Bob Runser, April 2007
