So I pulled the carby down again and removed the 2 brass washers, re-assembled and managed to get it to fire but not start.
Pulled it down again and installed a new set of points, checked the O-rings on the manifold, checked the decompresser, seems OK, re-assembled, but this time it wouldn't fire.
So pulled it down again and cleaned the new points with fine emery paper, re-assembled and put hose from carby into larger hole on engine cover, nearer to the fan blades. Then it started! Seems to run OK, but haven't checked the idle adjustment, as pleased it was going again.
Cut-out switch seems to work OK.
Noticed that when you rock the blade plate back and forth by hand, you can feel/hear a slight play in the engine, which might be play in the gudgeon pin or play in the con-rod bearing on the crankshaft. Turning the blade plate you can find the spot when the play/knock is the greatest, then turn the plate 180 deg and the play is at a minimum.

So does this mean the main bearing or the gudgeon pin? How bad can it get before serious damage is done? What is it going to cost to replace bearings?

Styx

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