I have now taken the generator out of the engine. You can see from the picture below that it is knackered! There is a burnt out set of windings, and hence no charging voltage of any worth. I dont remember it being like this when I rebuilt the engine, but it must have been damaged, and it has got worse and worse. I can only assume that the whole charging circuit was damaged as the reg/rec was also faulty when I first started up the engine.
