I'm new to this deal, but I've noticed a few posts wondering about blow-by on compression releases. I'm a faller in Montana and the first thing I do with a new saw is plug the compression release with a bolt. They are worthless. They make the saw easier to pull, but you have to pull the thing 90 times to start it. Just my 2 cents, but give it a shot. Often times just pulling the top cover is enough to bump the release and create blow-by