While you wait for answers, we may have found some information which could help you.
Click here for Diagram Riding Deck
John Deere L120 engaging blades kills engine?
What would cause belt to flip on a pully ?
lawn mower ?
John deere z425 54c mower want start?
john deere js30 won't start?
JD lawn mower LT133 wondering if clutch switch could be bad?