While you wait for answers, we may have found some information which could help you.
Click here for Rototiller Repair Engine
How do I set the float level in my carb?
Sears self propel lawnmower and the front wheels do not move?
What is the problem with my Sears Garden Tractor?
lawnmower problems?
why is the pto switch on my sears tractor burning out?
Mower cranks when primed, but after running a second or two dies?