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