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