Going back to Tiggie's first posts; "will start no problem if I spray starter fluid into air intake, then engine dies once fluid has burned up. I have stripped and cleaned carbs more than once I can open float bowl drain and put petcock to prime and watch petrol pour out so I know carb is getting fuel. Battery is fully charged and I'm getting a spark at both cylinders." This sugests that there is compression there and that the engine is only burning the Easy Start and not fuel. The plugs are dry, so fuel is not getting from the carb float bowls in to the engine. I reckon there is a blockage in the pilot jet or main jet circuit. Tiggie, how recently did you put fresh fuel in the tank or go on reserve? Worth draining the float bowl into a clear glass and seeing if there's any crud or water in there! Also try starting it with the fuel filler cap undone as a partial vacuum in there will restrict fuel flow. As said, low compression is unlikely, but needs eliminating from the equation. The only other thing that would prevent starting is timing , either ignition or valve timing, but that is unlikely to go out overnight!!! Good luck and keep us posted