I finally got my rebuilt Nikki carburetor re-installed.
On the rear (firewall) side of the carburetor there is an auxiliary arm with a weight on the bottom. I'm not sure I have this set up or oriented correctly. Here's a picture of the auxiliary arm in the down position (my finger is on the weight):
When the arm rotates into the "up" position there are a couple of tabs that collide, one on the auxiliary arm and one on the throttle mechanism, so that the arm's upward rotation moves the throttle. Here are the two tabs:
I'm confused because those two tabs really only can intersect when the throttle is applied or the choke is pulled. Otherwise, when the auxiliary arm rotates up it doesn't do anything.
What is the purpose of the auxiliary arm and when it moves into the up position?
Can anybody confirm that I have it set up correctly, meaning it only hits the throttle arm when the throttle (or choke) is being applied?