I have a Craftsman riding lawnmower model 917.254791
Have never seen it run before and had sat up for awhile ......rebuilt carb and reset speed adjustment cable per owners manual .....cranks up good but idle hunts all the time ..have readjusted idle speeds ect and float level thinking it wasn`t getting enough fuel but nothing has helped ......its a strong motor and doesn`t smoke ect ......12.5 hp with OHC
Thanks .....must be a trick to it eh?

GEORGE, June 2009