cumn thru.. what do you mean make sure the throttle is closed before backing out. Are you saying that in order to completely close the low end that the throttle has to be closed or it will not screw in all the way? I don't see how that would correlate.. so... I think I am just not understanding you.

I fixed it by the way. I turned the regulator out/couter clock/richen. I actually have it above the casing. It immediatly started purring. I was elated to see this. didn't bother to set the high end fully. The low end was great. The high end was too rich, but, didn't have my tach and didn't want to mess with it w/o tach. It was actually holding still with my 16x6 prop!! Of course... this was on grass, but, I think it will hold on concrete. I had to turn the thing out over half a turn (I am told that is a lot for the regulator) http://home.comcast.net/~mark.fuess/ys110.htm.