Monoloco17, and sorry for stepping on your toe's Equest, the YS are a picky motor, as I have seen from veteran modelers and long career mechanics at my club are continuously messing with them. I would strongly suggest that you do a good search on the YS, and take in what problems they may have. Just because someone tells you that there is no problem with this engine, does not mean that you're not going to have a problem with it. From what I have seen I wouldn't do it.

Equest, the reason I say this is because two of the person's at our club, one you know have had nothing but problems with them. Dewayne R and Bobby W, both have gotten rid of theirs due to the problems they have had with them. You must remember that this engine is a super charged engine in which can bring complications.

Blackie