The engine is now running again with a new piston and ring , two new main bearings thanks to Ade(Yozhek) , and new hardened grub screws on the flywheels . New governor springs have been ordered as well , as the original ones had stretched to far , my fault . It's running on temporary springs
which will do for now.
Thanks for everyone's help in getting my engine running again .
Regards Trevor.