Its a craftsman 18.5 briggs and stratton engine, riding lawn tractor. I just got it back from the shop, all was well, stalled in tall grass, now it will not re-start, only turns engine over and makes loud BANG. I have a new battery and have replaced the plug. What's wrong????

Anniebelle123, April 2010

Sounds like it may have sheared the flywheel key putting the ignition timeing out.

Husqvarna man, April 2010