2 month old saw with maybe 5 gallons of gas just quit. Would start up after sitting over night, then just died and would not start. Dealer reprogrammed the carb ( for free) and all is well again. He said it was running very rich, but really showed no signs of that. I am just wondering if this is a common problem with these auto-tune saws and if there is a carb tuner Joe Shmo can buy to do it myself out in the field if needed. Other than that, very happy with the 550.