[CADET127]

Just wondering if anyone else has had this problem - it's a 1970 cub cadet 127 - 12hp koehler - hydrostatic drive - motor starts fine , runs fine , until after using it a while and good and hot , and it seems to be doing it more often lately , you will be going along and the motor will just , pow , and it will scare you , and the motor will just freewheel until it quits rotating , like something broke , valves stuck open . You can try it and it turns over with no compression . Sometimes you sit there for a couple minutes and it will start and other times it takes longer . I thought maybe at first it might be an ignition problem making it quit running . This engine has a compression release on the camshaft to hold , i think the exhaust valve open until it reaches a certan rpm . I don't know if maybe an ignition problem may be causing the quit running and maybe when it pops the compression release gets activated to cause the no compression or if the compression release is causing the problem . It will always restart after a little but man , when it pops or backfires it will just about make you want to jump off and run .