We may have found other answers which could help you.
Click here for Started System Start
Sears self propel lawnmower and the front wheels do not move?
Mower cranks when primed, but after running a second or two dies?
Problems starting Lawn tractor (Sears Craftman)?
transmission sears 917.2555581?
Screaming tiller?
Sears 30" rear engine rider won't turn off with the starter key?