Hello and thank you for looking at my Primus No 100. I was excited to find this stove at an antique shop the other day. I have an older No 1 that I'd like to get cooking, but it will need some tender fettling to bring to working order. In the meantime I'm hoping this newer stove will work for me. I like this model with the removable pump-handle tank cap. I gave it a new spreader ring and leather cup washer. It seems to be generating pressure, so next step is to put fuel and fire to it. I'm unsure of the age of this particular stove. Perhaps one of you can direct me to a relevant thread concerning dating these units. There are numerous stamps throughout, but the hex base of the flame generator has a "26" stamped on it. Take care Boreas
@Boreas Look at the underside of the tank and see of there is a date stamp. It will be on or two letters. The Primus date chart is here: Primus Dating Chart 1911 - 1964 Cheers Tony
Thanks Tony. This one appears to have no date code on the tank where you'd expect. Are there specific years which had no tank stamp?
There would be no date stamp on your stove after 1964. The number 26 on the hex of the burner is no help, but are there any other number sequences on the stove? Tony
Interesting, not surprising that it's newer than '64 given it's in pretty good shape. When where they manufactured until? As far as I can find, there are no other numbers on any part of the stove
That being the case, some detailed photos of the stampings may help in narrowing the timeframe. Cheers Tony
Great example. It does have the look of a later 100/4128. The pump knob being the reserve cap and the shape of the No.100 stamping, also the PRIMUS on the riser. Have a look around the leg tubes as well for a number code, although they stopped marking them latterly. Alec.
@richmay you called it. It's a bit covered in solder, but there's a distinct "62" on the pump tube. The burner hex is stamped 26 on one side and the other has a very light stamp, possibly "5102" @Rangie thanks for the input. The leg tubes do not appear to be stamped anywhere.
Could the stamping be 5162? Then the full 6 digits would be 265162. I have a Primus no 5 with 24 stamped on one hex and 3559 on the other and the stamping on the riser is 203559 so agreeing that the burner and stove date from 1959.
I've spent the last two winters living off grid, using this Primus 100 as my primary cook stovpe. I'm quite satisfied with the unit as it's proven very reliable. I'm now having a burner issue I'm unsure how to solve. It seems to pump and hold pressure, it primes and there's a flow of vaporized fuel from the jet. However the stove will only stay lit if an external flame is held to it, regardless of the pressure of the tank. It roars when a lit match is held to it, but extinguishes when the match it removed. I removed the flame spreader and put on a silent burner cap from another stove (Vesuvius), this allows the stove to stay lit. What do you think the issue is? Does this perhaps indicate the jet bore diameter has become too wide and is allowing too much fuel to escape? Thanks in advance
