I have a YS110Fz on my Utra Stick. What an awsome engine. The previous posts are right, after you get it tweeked in you have few problems.

I don't believe in buying engines over, I mean first an inferior engine, and later a decent engine. I would much rather spend the cash the first time and buy power and quality. The issue is I would like to put either a YS63 or a Saito 72 on my Proteget 60 Trainer. I am going to use my GMS 76 as a paperwieght, a piece of junk. I figuer that after I am bored with the trainer for just fun flying I could put that engine in an other plane.

I am a YS man now. I get along with them fine. Why break habit, but will the 63 pull a trainer? I think it would pull it around no problem at 1/2 throttle.

What's your opinion? we'd like to know...