Chainsaw Repair

The 30 degrees is cool, but it's the filing of the rakers that could cause it to be grabby like that. It's easier to over do it with .325, while 3/8 is more forgiving. Just taking some guesses here, cause I agree that it should be performing better for you.

The shop wouldn't adjust the saw cause it would void the warranty? They probably get a LOT of warranty issues if they won't adjust them properly. Which way did you go when you adjusted it? Out on the hi I hope. Try opening it up until you hear the RPM's drop off, and then go back in just enough to bring it back up. Might make a difference.