While you wait for answers, we may have found some information which could help you.
Click here for Spark Plugs MowerMower won't stay running?
John Deere L120 engaging blades kills engine?
What would cause belt to flip on a pully ?
was mowing with john deere lx172 just quit running , dead?
John deere z425 54c mower want start?
John Deere L130 clutch problem?