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