12-09-2019, 11:03 AM
You have not stated that you have four good sparks. Have you spun the engine with ignition on and all the plugs connected and lying on the head. If you get four good blue sparks it looks as though the ignition system is not the problem. If there is any doubt about this change ignition components until you get a good result, and don't forget that the rotor arm can fail, earthing the spark through the middle. I have come across this more than once.
Robert Leigh
Robert Leigh