While you wait for answers, we may have found some information which could help you.
Click here for John Mower StartJohn Deere L120 engaging blades kills engine?
Mower won't stay running?
was mowing with john deere lx172 just quit running , dead?
john deere lawn tractor LT 15?
john deere 120 shuts down when engage mower deck?
What would cause belt to flip on a pully ?