I just dug out the directions.
To charge, unscrew and take off the fiber handle.
Fill the tube with gasoline.
Screw on the filling cap tightly and replace the fiber handle.
Stand iron on end and fill the priming cup full of denatured alcohol or gasoline and light. When it is burned out, immediately open valve and touch lighted match to large holes under copper point. The vapor in the tube will ignight causing a strong hissing noise which indicates the iron is burning well.
WOW! Sounds like a finger burner.