> On the stoves I have owned (a camping gas and pocket rocket) the valve is held in
> place with a pin. So valve maintenance is impossible.
Ah, and the valves on some of my stoves were held also locked in by some mech or another. In the case of pins, I just pressed them out. They are roll-pins, and this was easy enough to do. The pin is there to satisfy the lawyers, to make sure I can't unscrew the valve so far that it falls out. Can I assume you know better than to do that - at least while the stove is connected to a canister!
In the case of lock nuts, some of them were held in by Loctite or similar. Boiling water and the right sized spanner fixed that.
> I cannot remove the burner (the parts appear to be pressed together) on the pocket Rocket
Over the years I have collected a few stoves from most of the vendors around the world. I have yet to find one stove which does not permit the owner to remove the jet for cleaning.
The burner tube on my Pocket Rocket is attached to the base with what looks to me like an M11 x 1 thread. Yes, it was screwed on tightly.
> I don't agree with the author about the odorant as being the most likely cause. It
> is unlikely ethyl mercaptanhe is the cause because it evaporates at -148C. It won't
> be in solid form at the jet or valve.
I agree that it is most unlikely to be ethyl mercaptan. However, the odorant does not have to be ethyl mercaptan, and the fuel does not have to not-contain-anything-else. It is interesting that some (not all) screw thread canisters have given this problem while the Coleman Powermax canisters have never given me this problem.
My interpretation is that the fuel in the Powermax canisters was more highly refined, precisely because the fuel was being used as a liquid feed, while many screw-thread camisters have less refined fuel because they are designed to work upright. If the fuel evaoprates off, any contaminants are going to be left at the bottom of the canister - and there is often quite a smell if you open up a genuinely empty canister. Perhaps there are cheaper odorants than ethyl mercaptan which don't evaporate that easily?
In the worst case (some cheapy Chinese canisters), there was also fine dust in the fuel - that played merry hell with the jet on a winter stove when the canister was inverted!
Note that none of the normal screw-thread canisters are warranted for use inverted. That is not part of their specification. Caveat Emptor. (Footnote: I have emptied 450 g canisters of French Campingaz inverted with never a problem.)
> Instead I think the silicone oil the author recommends applying to the valve might be the cause.
Oh, that's possible, for sure. But this happened before I ever stripped this stove down for maintenance, and I think others have also had the problem with other stoves. The silicone grease (not oil) could have been applied by the manufacturer, but where it would have come from within the stove ... I don't know. Anyhow, I never apply *that* much grease!