Late last year I picked up an F1 Ultralight, and on my first test run noticed (smelled) that it was leaking gas after being screwed down to the canister.
So I dug up an empty canister to fiddle with, and noticed that when screwing it down I felt metal-on-metal before I felt the (internal) o-ring compress.
After some inspection, I noticed what I would describe as a “manufacturing tolerance issue” (which is illustrated in the first photo below), so I returned it and ordered another one.
With the second stove, while I still don’t feel the o-ring compress, I don’t smell gas leaking either; or at least I don’t with the two canisters that I have on hand. I’m concerned that I might with other canisters (given some manufacturing variation).
Here is a photo which illustrates what I think the problem is.
Since the o-ring is at the bottom of this threaded insert, pressing the insert too far into the body will prevent the o-ring from making contact (with the canister).
The gap on my second stove is just under 1.0mm.
On my first stove, this gap was just over 1.0 mm.
Question: For all the F1 Ultralight owners out there, does your stove have this gap???
– PLR –
