Hi Bruce
Sorry for taking so long to get back to you.
I have taken the engine completely apart again and reassembled the engine with a governor system taken off another Suzuki engine that I obtained from scrap (engine had a mint governor).
I reassembled the engine and put it back on the body with a spacer to achieve the right cutting depth.
As I completely dismantled and serviced all the engine parts this mower now runs great. It does not miss a beat and has loads of power. It cuts almost everything without issues and gives a great finish.
These engines seems to be of a very good design.
