Well, for what it's worth, I owned (past tense) three. An Evo 40, 61, and 100. NONE of them ran well enough to keep. The .40 started out ok, but after several tanks, it would start but not transition. The same with the two others, except the 100 never would run right no matter what I did. Our club has several guys that could be considered engine experts, one is FAI Pattern level and absolutely KNOWS engines. He could not get it to run right. We would get it set up at idle, hit the throttle, and it would die. After we got it adjusted to what we thought was correct, I put the plane in the air. One flight, land, refuel, back to 'normal'. I went back up, and it would die on throttle transitions. At times, I could not get it off the ground because it would just die.

I went to my LHS and bought an OS 1.20 AX and replaced the Evo 100 with it. Never again did I have a problem. When I go out to the field now, I fuel up, turn the engine to get fuel flow to the carb, attach the glow driver and flip the prop with my chicken stick and go flying. No more sweating over getting the stupid engine running. That was back in May. I still have that OS 1.20 AX and it still runs like a champ. In fact, it runs well enough that I bought another for another plane and it too runs like a champ.

My LHS has the EVO's in his showcase for sale 'on consignment'. All of you evo lovers.. go on over and pick one up. I'd be glad to sell it to you.

DS.