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