Well its going.....
Serviced the carby - new O-Rings, Needle, Diaphragm, Primer Plate, new O-Rings for the manifold (big and small) - and of course gave it a real good clean.
Put some petrol in it fired up almost straight away.
Engine is running really well - but running quite fast - despite the new O-Rings - had a few goes at pulling it apart and putting it back together, trying to be real careful with the assembly - now when I start it it run s quite well, will respond to throttle, but once I go to full throttle, it pretty much stays there

Gives me the impression that the throttle cable is getting stuck - but when I pull it apart I can see the throttle working OK.
Hmmmmm
Bloody kerb side mowers!!!

Polybus