so i decided to run my slayer today and blew my engine. i don't know what caused it, because one second it was running fine then i heard a weird noise come from the engine then it revved up real high and i had to kill it. i took it apart and a small shard of metal was sitting on top of the piston. that shard came off the part of the connecting rod that attaches to the piston. does anyone know what could have caused it? also what type of engine should i get when i get a new one?