I wonder how to remove the burner from the rising tube on this Primus 1s or. I'm afraid of tearing the tube attached to the tank when trying to unscrew the burner. Although there is no leak, I want to change the seal. Thank you for your always enlightening advice.
Don't be afraid to put a wrench on it and turn it. The gasket will break before anything else will. I have a couple of these... Mine always had two gaskets... One in each side of the Spirit cup
You have every reason to be concerned- this stove has the earlier type of riser to tank joint, which is weaker than the revised version which was introduced later. It is very easy to break this joint while attempting to remove a burner, as can be seen from the number of earlier stoves with solder repairs in the reference gallery. The safest method is to make a simple wooden clamp to hold the riser, and hold this in one hand and the spanner in the other, so you exert no force on the tank joint. An example of a clamp is here, there are other versions on this site. Basically drill a hole in a piece of wood, cut the wood in half, use some sort of clamp to apply pressure. Don't overdo it and crush the riser though, barest minimum force. I agree it is a good plan to replace the washers, the originals don't last forever and should be regarded as a service part for reliability. They will contain asbestos so don't snort the dust.
