This is Curtsey of the:
Sometimes you don't need to completely rebuild the lantern or stove. Usually you can identify and fix the problem or problems rather easily.
Select a symptom from the below list. If you can't find your exact trouble, choose the closest one. Unless indicated, the steps apply to both lanterns and stoves. If you're still having trouble when you go through the repair steps please feel free to send me an email.
Pump plunger has no resistance.
Loses pressure right away or within a few minutes of pumping.
The plunger stem rises after I pump it up.
Leaking fuel somewhere around the on/off valve.
Nothing happens when I open the valve 1/4 turn.
Only air comes out of the generator.
Lantern burns dim.
Lantern burns yellow.