This stove has been fully refitted with new seals, a superior 'Seffa' pump cup and a new jet in the burner after it was heated and quenched because it was almost totally blocked. The fuel filler hole in the tank had to be resoldered at the base because it had a leak under the air bleed screw. The stove was then cleaned and lightly hand polished to tidy it up.
Hey threedots, looks like a wonderful fettle. Nice to see some stove spindles with universal joints on them. Reminds me of the 123 downward spindle control Ron
Hi threedots a very nice fettle/restoration to a realy nice old classic stove you have done a brilliant job with the heat and quench as it now burns with a perfect atmospheric blue flame well done there
Great set of photos, picking out the details. The burner has the characteristics of a transitional solution - they've got the flame control but haven't achieved a built-in pricker as well. In the 107 and 110 models, Primus managed to provide the built-in pricker but not the flame control. Primus 41 - sorted. What a marvellous stove though, threedots, and a fantastic job you made of the renovation and this post. John
Cheers everyone. It had been worked on before, but many years ago. The burner had been removed by someone using grips, instead of proper sized spanners so there are a few marks around the burner, including some from it being held and tapped, probably to loosen some of the carbon from inside it. The burner itself has some strange quirks in operation and I feel that it may not have been all that popular to use. Possibly why they are so rare today. 1. The regulating spindle is steel and tends to stick in the closed position, once the burner begins to cool down. It can only be released safely if the burner is preheated to get it hot enough to do so, otherwise the spindle seat or the universal joint could get damaged. 2. When the burner is turned down to a simmer setting, it will gradually turn itself almost totally off, unless it is turned up a little more to stop the burner cooling further from an ideal heat. You have to fiddle around with the regulator - annoying and a bit of a balancing act. I understand that because the spindle is made from steel rather than brass, the 2 metal types cool and move at different rates, further restricting fuel flow(creeping) when simmering or cause the spindle to stick in the off position. To avoid the spindle from sticking, you have to remember to open it about 45 degrees anti-clockwise from the off position, as soon as possible after the stove has been stopped from operating and the fuel tank bled of all air pressure. The burner is quiet easily sealed onto the top of the cone on top of the riser tube and does not need any other seal for a gas tight fitting. The tank shows signs from a lot of use and has scratches and very small denting, but not bad for 80 years old, at this date. It was obviously used in a way it was designed for, and it lasted well. I am waiting for Robtz to put his Primus No.14 up in the Stove Reference Gallery. It would be nice to see it in detail. I assume that there was never a No.13 - bad luck number I suppose. John
Really neato burner. Very nice job on that one. Wow. Thanks for showing such a beautiful #12 example. sam
