I have an old McCulloch 605 my neighbor gave me 5 years ago and was sitting for years before that.. due to someone stealing my old 20" Craftsman, that I really liked. I need to get the 605 running. I took it all apart cleaned, checked, fixed and, I got it running. can anyone tell me a good starting point to set the high and slow speed carb screws and then the best way to get a good tune. and is turning the screws in or out more fuel . thanks for any help .