After reading your tale about seven times, I conclude you are missing the 310001 cam follower. Or it is assembled wrong.
The “lever and pin” should never be touching the cam.
The “cam follower” rides the cam profile, and transfers the motion to the “lever and pin”, which in turn rotates the throttle shaft open.
Make sure the “lever and pin” is pointing in the right direction. I’m thinking it points downward, but I could be all wet. Then make sure the “cam follower” rides the cam and pushes on the “lever and pin”.
