While you wait for answers, we may have found some information which could help you.
Click here for Clutch John DeereJohn deere z425 54c mower want start?
Mower won't stay running?
john deere clicks rapidly but will not start?
was mowing with john deere lx172 just quit running , dead?
What would cause belt to flip on a pully ?
john deere lawn tractor LT 15?