While you wait for answers, we may have found some information which could help you.
Click here for Diagram John DeereJohn DeereL111 mower deck does not engage. ?
Mower won't stay running?
What would cause belt to flip on a pully ?
John Deere L120 engaging blades kills engine?
John Deer LA105?
JD lawn mower LT133 wondering if clutch switch could be bad?