The opening of the throttle plate can be delayed as long as

I'm trying to adjust the sawtooth throttle on my H. I can open the throttle to 8 notches from the top and it is at the 1815 rated rpm. When I go above that it will overspeed, up to 2500rpm! At the last notch on the quadrant. I have tried the adjustments in the governor, the only thing I have been able to do is set the high rpm screw so it stops at the 8th notch from the top. I should be able to have full use of the quadrant and not go over the 1815 rpm, right? Does anyone have a pic of the throttle linkage under the hood and how to adjust it? I've also tried adjusting the rod in the governor between it and the carb, it is tightened all the way up now. Any ideas what I am missing?