Ok... I have FINALLY ordered mine and am going back and reading the entire thread again. Currently on page 20... whew... and trying to answer that same ole question of which engine. I'm only considering 2 - Y.S. 91AC (already have but never used) or the Saito 100. I read quite a few differing results on the Y.S. ranging from "it hovers under half-throttle" to "it hovers pretty well just above half throttle" and pull-outs seem to vary too. Looks like most have settled on the APC 15x6 prop for both these engines so the variables seem to be sea-level and original weight of plane and final weight of plane (based on electronics used). I've considered the weight difference of the YS to the Saito, and have even read where the YS balanced just right. I do like the pump factor of the YS as several are experiencing the loading-up of the non-pumped engines.

Sooooo.... does anyone have updated info after all their experience with these two engines? I've got the YS but seem to be still on the fence whether I should install it rather than a new Saito 100. Help... ha!

-s