Allen head screw for the adjustment wheel was frozen in the body and broken off with very few threads left showing. And what threads were showing were pretty screwed up and rounded off. Thanks to Tom, his torch and some WD-40 it will be back in the water soon!
From Tom
Here is how it works. The heat expands the metal and the air trapped in the threads. When the WD hits it it cools it and causes a reduced pressure in the threads which sucks in the WD. The auto ignition temperature of WD is about 480 F. As long as it won’t ignite when sprayed on with no flame present to ignite it the part is below 480. 480 won’t affect the metal or finish, I use this technique this on frozen valve bonnets and it doesn’t affect the Teflon washers or O rings in the valves.
[video]https://youtu.be/o8BQxuDaq4w[/video]