While you wait for answers, we may have found some information which could help you.
Click here for Riding Lawn MowerMower won't stay running?
John deere z425 54c mower want start?
John Deere L120 engaging blades kills engine?
What would cause belt to flip on a pully ?
john deere 120 shuts down when engage mower deck?
was mowing with john deere lx172 just quit running , dead?