I have had a Troy Built Horse for over 30 years. It has had its share of troubles mostly engine, Tecumseh go figure. The last time I used it it sounded funny couldn't put my finger on it but I knew it was not normal. Well last night I tilled my garden for fall to get rid of some weeds. I got done and parked it in front of the garage and shut the fuel off to run the carb dry. about 30 seconds into that it went KABOOM! and then SWISH, SWISH, SWISH. I could hear metal parts being disintegrated inside. So I am in the market for a new motor. Any suggestions?