Thanks Max
I have put the blade plate on and swapped the leads on the the electronic ignition. No spark at all. I was really hopeing that would be the answer.
Changed the ignition back plenty of spark. Tried it with a couple of different plugs, both spark well outside the motor, but it does not fire. Not even once. Even tried putting petrol directly into the plug hole. Does not seem to make sense, got spark, got fuel, it should ignite something. I have turned it over with a drill for more than a minute.
Only things left I can think of,
Increase the valve gap
New fuel (unlikely only filled it a month ago)
A longer reach plug, (it looked OK when I had the head off, so not much room for more)
My compression guage is about 30 years old but you would expect it to under read rather than over.
The electronic ignition is not firing at the correct time (I could try to find a capacitor for it and put the points back in)
