Thankyou Kieth, I will be going down tomorrow for another try and will take a rpm reading for you and then take the engine out of the aeroplane and check the timing as you suggested. I have a half gallon of fuel through the engine as of now. I can remove the igniter at 3/4 or above throttle and it keeps running but anything less and she stops instantly without the igniter. Thankyou again and I will report on tomorrows findings. Rad