Ron,
You are not an isolated case, sent in one of my Mag 91 fs. It was about a year old and started running hot and quitting, cyl/piston problem no doubt. No problem they sent me a new one and enclosed the old muffler in the box, I really appreciated that as the old ones are prone to seperate after a while. I have a good spare to boot now.Will I buy from them again?, YOU BET!