So my coworker Bruce purchased a used Mac 3200 and it ran good for one season w/ no issues. He let someone borrow it last winter that left the gas in it until a couple of months ago when Bruce tried to fire it up and couldn't get it to start at all. I took it to a local guy that still works on Macs and when I got it back I handed it off to Bruce without turning it over (mistake). Bruce tried it recently (a couple of weeks after being in the shop) and couldn't get it to stay running unless you give it a good bit of gas and keep it going. I took it back to check it out and have had similar issues w/ the saw...as soon as i let off the gas it wants to stall out. I checked the muffler and the air filter and both look clear/clean. What should I look at next? Should I take it back to the shop and see if they will help me out or is their possibly something i could do myself to adjust/clean it? Thanks in advance for the help!