I had the same issue derek, (have actually rebuilt the throttle control several times at this point), with the set screw out (just remove it completely) you need to pry the fixture off with even pressure on both sides. I used two pry bars against the sides of the cockpit, one on either side and with enough pressure it should pry loose. If you're worried about corrosion, spray a little pb blaster and that should penetrate and lubricate. If you pry on just one side it wont release (or at least it wouldn't for me).
Where did you find a new throttle assembly or are you planning to rebuild it?
Last edited by JBiermann; 09/29/14 09:38 PM.