Online manual for Scott's riding lawn mower w/ Kholer 16 hp engine 42 " made by John Deere
Drive # 7740717
Deck ## 774018
Automatic/cruise control

Perhaps the following site will have what you want or at least put you in the right direction:

Scotts Tractors - Manufactured by John Deere - Operator's Manuals (http://www.deere.com/en_US/scotts/serv_operators_manuals.html)