RE: Evolution engine
tmw,
I am having the same problem with my EVolution .61. It won't start inverted, but when you turn it right side up it will run and transition like opjose says. I have mine intall in a H9 harrier .46. I have repostion the gas tank, bought a new gas tank assuming it was not maintaining pressure. I am open for any new ideas as well. I am in the porcess of buying a an ASP 80 four stroke for the Harrier .46.
My only concern being new to four strokes is, will this be enough power for this size plane?