What I mean by it is that the throttle is not at all linear. That is not enough control etc. I think 10,600 RPM on a 14-6 prop is revving plenty enough! A carb that is oversized does this, butterfly valves do this unless staged with a secondary set, or the rate of opening exponentially decreased. Not sure about our rotating barrel carbs, but would appear to be better than butterfly valves. The TT problem is that the restriction of the choke adaptor is making the last part of the throttle ineffective.