Hi, I am new to this forum but a friend recommended it as "the" resource for saw questions. I have an MS310 that I bought new in 2001. I use it every year to cut about 6 cords of mesquite firewood out of a friends ranch fencelines. It recently developed a problem where it will start up but die the minute you give it throttle. I put in a new spark plug mixed a new batch of gas and the air filter is clean but no help. The local stihl dealer where I bought it seems like a jackass and I am leery of taking it in for service-I don't want to be taken for an expensive ride. Should I try and get it fixed or should I just consider it worn out and upgrade to a better saw? Is this much mesquite about all I can expect to cut with a cheap saw like this one? I am no expert but it seems a lot tougher cutting the mesquite than the pinon, pine, oak and juniper I used to cut in NM. Thanks in advance for any advice.