While you wait for answers, we may have found some information which could help you.
Success
Message
Carburettor?
Lawnmower repair?
Tractor won't shift into gear?
How to recoil the starter spring - Champion R484TR?
Throttle issue?
Flymo 400 turbo stopped working?
Trying to find lawn mower part- Power Devil PDG4037R?
Bosch al3640 cv?
No ignition light?
Reassemble Throttle?
How do I trace a Lawn Tractor starting problem?
Mountfield empress drive belt?