For your OS carb, the throttle arm is held on the carburetor by a small phillips head screw. If this is not tight, the throttle arm will move without moving the carburetor barrel. Likely because the barrel is still stuck. Soak the carburetor in your glow fuel overnight (covered container so the fuel does not evaporate), then make sure the screw is tight, and see if you can get the barrel to rotate.