RE: Evolution engine, Need commend
I am an instuctor at our field and I have worked with the Evolution engines on 6 to 8 student's airplanes. I found them to be very easy to start, run well, and put out plenty of power! I was really surprised that a new engine could run that well right at the start! And they are not overly expensive either. I did have trouble getting one to run right, but it turned out that it was because of bad fuel. Fresh fuel and it ran perfect!
Of course these were all brand new this past summer, only time will tell if they will stay running this well after a couple years. But as of right now I would (and have) recommend them to anyone.