A while ago I bought one of Gary's 3d printed mini caps for my Primus Multifuel. Unfortunately the stove always goes into underburn after some time if used on a low setting. I made a video for you all: I only tried it with butane because that is the fuel I most often use in this stove. Would be nice if you could share your experiences with this combination, or if someone has any idea what I could be doing wrong. At this point I really don't know what to do Regards Simon
@webster Check the inside if the cap for loose particles, they look like little white chunks. They could be igniting the fuel inside the cap after the get hot enough. Just a thought, I've not had your problem using the same cap. Mike
Just tried it on a svea 123, no underburn. But it also does not get as hot there. If I remember correctly, the svea has a .23mm jet, while the gasoline/butane jet for the Primus' is .35mm.
