Coleman model 16 space heater

There are 2 knobs, the generator knob is the smaller of the two

there is a cap with knurles around the edge and a screw in the center, take that off and add coleman fuel.

this cap may leak air because the gaskets get old and crack- so pump it up and put some soapy water on it and see if you get bubbles

okay THIS IS IMPORTANT!!!!!!!! if you have never fired one of these up before~~~~~ dont do it in your kitchen-- you will burn your house down--- fire it up outside first to see how it works!