hirst,
I had one carb that I couldn't get loosened up to save my life. (The engine had been in a drawer for about three years.)

I eventually had to carefully heat the body of the carb with a small torch. I used the screw for the throttle arm and a couple of small washers to hold it tight. (Don't want the plastic to melt.) Should be able to move the throttle barrel while the carb body is still hot, and then it will stay free after it cools off.

You can buy small "pencil" torches that you re-fill with "butane" for cigarrette lighters. I've seen them go on eBay for about $8 shipped if you can't find one locally. These torches will work pretty well for soldering wire for landing gears and stuff too.

That glow igniter should be on the charger for at least 10 to 12 hours if it's really low.

Good luck,
Dennis-