While you wait for answers, we may have found some information which could help you.
Click here for Change Gears FineSears 151/2 46" automatic drive 917.256552?
transmission sears 917.2555581?
why is the pto switch on my sears tractor burning out?
Need to stop carb leak on old Sears Model 917298131 tiller?
Sears 30" rear engine rider won't turn off with the starter key?
Starting?