I'm running my first gas engine,Running in to trouble starting it, possibly because I don't know how to postion the prop relative to top dead center.

It's a 2 stroke 40cc engine, I have run it on a stand but I changed props when I put it on the plane.

My arm is sore from flippin it and so is my thunb cus it wacked me twice (ouch)

Thanks in advance


Scott