Troubleshooting Your Alcohol Stove

The jets on your soda can stove don’t ignite

There might be a couple of reasons for this. First, the jet holes might be too small. It’s difficult to enlarge holes in an existing stove, but go ahead and give it a try. But gentle, though—you could easily damage the stove if you aren’t careful!

The opposite might also be true—the burner holes could be too large. Image there was no cover at all where the burner holes are located—it would burn whatever vaporized denatured alcohol happened to evaporate from the side walls, but you won’t get any real pressure pushing the vaporized denatured alcohol upwards and outwards. If burner holes are too large, they might ignite, but even if they do, they won’t burn well.

Another possibility is that there’s a large gap between the top of the inner wall and the top portion of your stove. If the gap is too large, the building air pressure that should push the vaporized denatured alcohol through the jets might push it through the gap at the top of the inner wall. So mind your gaps! One reader suggestion blocked the small gap with epoxy and got his stove to burn for 35 minutes—far better than my stoves have ever done. So that might fix the problem.

The jets on your soda can stove go out after a few minutes

One person reported this as a problem. He did state that the notches at the bottom of the inner wall were quite a bit larger than the ones I had on my stove and wondered if that might have been the reason. I can only guess, but it’s a reasonable deduction. The jets light when pressure inside the wall builds up enough to eject vaporized denatured alcohol out the holes. If the notches in the inner wall are taller than the level of the denatured alcohol, the air could escape through them before sufficient pressure builds.

He also worried that maybe the jets went out because the holes were too small. That probably would not be the cause, however, because if the holes were too small, they usually don’t light in the first place. Once they’re lit, they tend to stay lit until it runs out of fuel.

I never heard back of the guy with this problem, so I don’t know if a new stove with smaller notches fixed the problem. But it’s as good as theory as any!

The jets on your stove burn unevenly or weakly

One person reported this problem, and he tried skipping the step where you make notches in the inner wall and that fixed the issue. So go ahead and give that a try if you’re having that problem. As long as enough fuel can seep through the crack at the bottom of the inner wall, it should still work fine!