Sigg Firejet

Discussion in 'Stove Forum' started by Colin McCarthy, May 12, 2026.

  1. Colin McCarthy United Kingdom

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    Hi all, I just received a Sigg Firejet off a popular auction site. It looks barely used, but I have a question regarding the pump. Should the O-Rings in the pump and fuel line be lubricated at all? There's no mention in the instructions, but in my scuba diving experience, O-Rings get lubricated to ease movement and prolong longevity.
     
  2. barrabruce

    barrabruce Subscriber

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    Yes and oil the leather pump cap.
    My last of 3 pumps just failed. They all developed a crack where the fuel line screws in on the thinnest section.
    I may attempt to plastic weld one up if I can figure out which plastic it is.
    I can still use it as a butane gas burner till I sort something out.
    I use food grade oring grease and olive oil for the pump leather.
    Take a tip.
    I use an old burner inner cap under the middle nut to stop the legs from going wonky and support the load better when you put a big pot on it.
     
  3. Colin McCarthy United Kingdom

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    Thanks barrabruce, leather cap is nicely oiled but the O-Ring on the fuel line was just screaming for some lubrication as it got screwed in. :thumbup:
     
  4. barrabruce

    barrabruce Subscriber

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    Don’t forget the one on the burner head connection.
    There is an other ball for a valve in the pump handle cap.
    Over pressure valve if you didn’t know.
    You will be cackling along in no time.
    Slow on the boil but good to actually do cooking with.
     
  5. Colin McCarthy United Kingdom

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    Just fired it up, its pretty impressive :lol:
     
  6. hikerduane

    hikerduane Subscriber

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    I’ve been using pure neatsfoot oil, it won’t get gummy like olive oil.
    Duane
     
  7. Colin McCarthy United Kingdom

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    I seem to have a very well-built Firejet, but aware as I am about the lack of spares, I wanted to keep it safe in a rucksack. Asda to the rescue with this £2 snack pot, which is a perfect fit.
     

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  8. IvanN

    IvanN United States Subscriber

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    I keep mine in a granite ware cup, but the snack cup looks like a nicer setup.
     
  9. ajvuik

    ajvuik Subscriber

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    I am fortunate that I have both of mine in the original bags. But your solution looks nice as well.
    Nice and sturdy I guess. But how does it holds up in a rugsack? Won't it crack?
     
  10. Colin McCarthy United Kingdom

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    It's pretty sturdy, if it took enough of a beating to crack the case, I reckon I would have more serious issues to worry about.
     
  11. ajvuik

    ajvuik Subscriber

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    Good to hear. I had these kind of containers as wel, but they became brittle over time. That's why I'm asking.