what size would be good for a rascal 40. I'm getting a Saito and was wondering if a FA-62 A would be to much power, i do want to overpower it just a little but not enough to fold the wings in two.

I had a Saito 56 in mine, it was perfect.

that is what i have wrote down here after researching... a 56 or 62 both in stock and about the same price.

did it fit in the cowl ok and its not too overpowered is it?

TOO OVERPOWERED, there is no such thing, as that is what the throttle stick is for. A Saito 62 should work very well in the rascal. I think with that engine you would only be a little overpowered by your standard. Power and alttitude are your friend.

I fly mine on a Saito 45 so a 62 should be brutal.

62 would work.

How about a Saito 90 twin??

http://www.youtube.com/watch?v=g_qiJh86CsY

the Saito 56 fit perfectly

Using a inverted saito 50 in mine. flys great

I had the Magnum 52 4 stroke in mine, perfect power, but even so, a tight fit in the plane. There is not a lot of room in there. If the .62 is what you have and don't want to spend for another engine, go ahead and see if you can shoe horn it in. As for wanting to "overpower" the Rascal, I'm guessing you have no experience with one. It flies on the wing, very well, overpowering it is not an improvement. Best of luck with this fine plane.