I rent a mobile home (or used to) and require the yard to mowed by the renter. The renter asked me if he could use my Beaver to mow the yard until he got a lawnmower in a few weeks. I told him he could since the guy seemed so nice. I told him to watch the temperature and make sure the coolant was full. The next week I went buy and he said the enigne quit running. I walked over to the tractor and could smell the over heated engine. Anyway, scored cylinders, pistons and of course rings. He said he did not know what happened. As it turned out, he ended up not paying rent, stole my stuff that was there and trashed the place. Oh, I trusted this guy because he assured me he knew how to operate equipment because he was a heavy equipment operator (he really was). Go figure.