Kid that works for me had a log roll on a 2171 yesterday. When the log rolled on the saw it went wide open. Problem was the saw was stuck under the log for a minute or so wide open with the brake on. Busted bar and cracked tank no problem. Problem I do have clutch blue as blue can be, had to get that crank hot as hell. New seal on clutch side for sure, maybe some bearings. It's just a saw though, people stay up nights making them.