Yes I have a ryobi riding mower with 17.5 briggs engine model# 31C707 type 0154E1 code # 020926ze. I am missing springs and linkage for the choke and from the governor. I need a detailed picture as the carb is mounted on the engine. Where I can see where they go and what they look like. Thank you for your help.

Look up the parts breakdown on Small Engines, Lawn Mower Engines and Generators by Briggs & Stratton (http://www.briggsandstratton.com).