Take a household staple and straighten one end and use it to push up through the port and push the throttle thing upward. Obviously gently reem around the top edge first to remove any staked bits. Mine was missing the spring so nothing was making it pop up until I tried that trick.
@NeverGiveUpYota, I used that staple trick on a couple of the tiny jets / holes in my carb today: such a great suggestion! I'm going to leave a bunch of staples out in my shop for similar tasks. Thanks again.