Re: please help.. locking screw is stuck..
I use the heat method with a tiny pencil torch to cook off the loktite or varnish, then I found I can use a small driver tip in my hand impact hammer. One or to taps and then the screw turns normally. But replace the screw and loktite if needed. I found that on carb screws a drop of the wife's nail polish makes a good varnish that is easy to break loose later if needed for adjustment.