I bought a blown 346xp today from a guy and when he brought it to me, he also brought a ms311 sthil. Saw had no B/C, but it looked almost new. We decided to crank it up. Well it would fire and run for a sec and then clunk and die. We got to looking and seen that there wasnt a clutch on the saw so we removed the cover. You can grab the crank end and move it quite a bit by hand. Its a clamshell saw and if a new bearing and seal is all thats needed, then it would be a easy fix. The thing that really bothers me is this saw looks like it hasnt had a tank of gas ran thru it. So why would a bearing fail so quickly. The other thing I worry about is the clamshell where the bearing goes, is this screwed up. He asked me $30 for the saw, but I told him I wouldnt touch it until more research on my part. Without removing the cyl, I dont know of anyway to tell if there is more damage inside, besides the bad bearing and seal. I usually dont work on sthils and have never worked on a clamshell saw, so a little edumacation is needed here.