I try to keep fresh gas in the saw I just had a new plug ,gasfiter, air filter put in it.I think the carb needs adjusting- however, when I start "adjusting something" its never the same When you get it running its fine for a little bit then its starts stuttering about half way through the log, rather annoying when you are trying to clear the road for traffic.I used to marvel at the old 'Huskies" that the foremans used to carry on the back of the company pickups, everything throwed on top of them, wackers, chains you name it. Be a tree ion the road grab the old Husqvarna, give er abou 4-5 pulls running and running pretty well, I baby my Stihl carry it in a case and everything usually even use the Stihl premum 2 cycle oil, maybe I can get the dealer I bought it from( traded a Husky- the thing that really griped me about the husky was when you sat it down it automatically flipped on its side) I used to have good luck with Stihls maybe I just need to get it into somebodies hands that knows how to tune it( BTW the airfuel ratio would be a bit different here than it would at VA Beach) Otherwise I like it, the old 290s used to piss me off same weight as the 310 with less power, the reason I never bought a 270 was because I would not give a hundred dollars more for a lighter saw. I have had a lot of experience cutting right of way and clearing, now I basically just use it for light clearing and firewood. Not running your products down.