I have finally got the Genny running (sort of). Main jet clogged. PIlot jet is easy to access. Main jet needs a special screwdriver so I ground one down. Did not work, couldn't unscrew it and ended up nearly b**gring it right up. Poked it with a fine needle from her sewing box. Now I think the stepper motor governor is playing up to control ECO mode.
Looks like new parts in the very near future. I want to keep the Genny available at all times just in case we end up back in the early 70's crisis.