While you wait for answers, we may have found some information which could help you.
Success
Message
Trying to find lawn mower part- Power Devil PDG4037R?
Reassemble Throttle?
Throttle issue?
No ignition light?
How do I trace a Lawn Tractor starting problem?
Flymo 400 turbo stopped working?
Mountfield empress drive belt?
How to remove roller from lawnmower?
Tractor won't shift into gear?
How to recoil the starter spring - Champion R484TR?
Lawnmower repair?
Belts for old WEBB Mower?