That engine is just awesome once you master it.....3.5 hp rating with NO NITRO!!!!!
Must have tuned pipe.....got one?
Fuel mix..........have used these in helicopters many hours............ 12% Klotz, 1% castor, in one gallon of methanol. High needle set at 2-3 turns out and the idle set the same. (on that engine set the idle on the bench and then set the high side.
If you have problems send me a PM and we will exhange phone numbers. It is an awesome powerplant when you get it right. Best damn glow engine out there, but needs the right fuel mix.
Jack