You know guys, I have to say this is one heck of an engine I have it on a Twist 60 3D although I am not a 3D pilot yet, this engine runs awesome after the break in I tune the carb and this thing is just as good as my OS 75.. Throttle transition is perfect and has more power than my plane needs....So far I have not even used a starter on it...I have only started it with a chicken stick..So far I can't say anything negative about this engine....