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I received my all metal hit & miss engine a couple of days ago and just made a temporary mount to run it on today. I was thinking about fuel choices and as these engines use a mixer (no carb/jets) I went with alcohol. I use regular 91% "store bought" isopropyl alcohol and Motul 100% synthetic ester 2 cycle go kart racing oil. It runs much cooler than it would on gasoline. It hand starts very easily and the firing cycle is like my full scale 2-1/2 hp John Deere engine.
I finaly got it after several months, runs well on 2% mixed gasoline or lighter fluid, setting is 3/8 turn. Powered by 18650 battery with USB charger board, toggle switch and a green LED (+ a 100 ohm resistor). I put a 1/4-32 cap to connect the CDI to the spark plug. DO NOT connect the engine ground wire to the ignition case, connect it to the battery negative terminal.