To Fix it..
Take a patern file or dremmel tool, cut the tip side of the brass screws right down to the rod. If you nick the rod no biggie, if you don't get all the peened theads.. You will pull a BOB.. (Strip the threads right out of the rod.) Then you get to talk to the nice folks at the bing agency and get a new throttle shaft, they also have a video on rebuilding carbs..
If you were in the Airheads in AK. I'd show you how not to pull a BOB!