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