My sear st16 has a blown engine.its right at the bottom of the cooling fins, I believe the cylinder comes off seperate from the case. Not sure what in side looks lilke. all know is the its probaly filled with piston or con rod or something. the engine turns over half way and stops dead. the tractor is in pieces but i have all the peices i believe included the original owners manual. in great condition. Anywhere I can get that part? Or should I put different motor on it? backround info on the tractor. This sears is one of many lawn tractors on my grandfathers. He took great care of like everthing else he owned. sometime ago, it blew up and started taking it apart. the hood is off and put on a snapper outside to protect the engine. i have a box of parts sitting on the seat. its missing a rear wheel because i took it off for my grandpa because it fits his snowblower with a shattered rim. The Sears is sitting in the back of a shed so its not gonna get any worse. the mower deck is the only attachment i know of and its sitting outside somewhere. My plan is to restore the tractor and use it for its intended purpose. Any thoughts or suggestions? I will put some pictures up soon.