tripps said:
Basically I switched to a lower-quality butane without thinking and started having some issues where the gas wasn't coming through as strong as it used to. Then the gas stopped working completely. I emptied the gas and switched back to the butane I was using before, but it is still not working. When I turn it on all I get is a little bit of a hissing noise that usually lasts a few seconds before stopping.
Anyone know how I can fix this?
This is based on my understanding of what's up, I've never personally had one fail from low grade fuel, although in my ignorance I did foul my first some and made it erratic in operation, which I finally cleared.
What I think is at play is stuff dissolved in the fuel, contamination. As I understand solids are not the issue as there's a filter inside that should trap them. So, think about the minerals dissolved in tap water. If the water evaporates, the minerals are left behind. Likewise, the butane that evaporates inside the unit can leave the junk behind at that point. Not much junk needs to be there if over time lots of it ends up at the critical orifice that meters flow choking it off. That's what I think you have going for you. The cure is to flush fresh (clean) solvent. through it. As long as there's still some flow, we have a chance.
First, dump all the contaminated fuel (use a pin on the valve). Fill and dump again with the recommended fuel a time or two. Don't be shy. Then fill it up and open the feed valve and set it outside to vent down over time without burning (no heat). Hopefully, the pure butane will dissolve the junk at the critical point enough to flush it through the critical part. That's what happened I think in my case. My sputtering unit straightened up and has done fine since. It took several hours to empty at first (it would stop, sometimes sputter on it's own, I'd just let it run on the patio).
Good luck, as you know the units are a joy when they work well.
OF