This is what's left of a 20 hp Kohler Command on a Dixie Chopper. The customer said he checked the oil that morning and it was ok. While he was mowing a yard, he said he started to hear a rattling noise, but continued to use it because he said he thought he just ran over a dog leash.....Well you can see what the noise was. Look how the piston turned around in the cylinder. The camshaft broke right in half and the connecting rod looks like it's now turning the cam. New motor should be here in a couple of days.