I got one out after breaking it off on the last carb I did but I felt very lucky to get it drilled without damaging the shaft threads. It took a lot of patience. I drilled it as close to the edge as possible and used a sharp punch to break the remaining screw threads out. Like I said, I felt very lucky to get it out without ruining the threads.
If it had been more than one, I think I would have shopped a new shaft as has been suggested.
For future reference, I always use a Dremel with a carbide bit to grind those staked threads flush with the shaft. Also, NEVER try to force one of those screws. As you know, they'll break off in a heartbeat! If it offers much resistance to turning, you haven't ground the staked area off enough.
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Greg Reid
Palmetto, Georgia
 
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