We may have found other answers which could help you.
Click here for Tractor Drive Belt Clutch
Screaming tiller?
Sears self propel lawnmower and the front wheels do not move?
Mower cranks when primed, but after running a second or two dies?
lawnmower problems?
why is the pto switch on my sears tractor burning out?
How do I set the float level in my carb?