Optimus No.5 … the collection grows

Discussion in 'Stove Forum' started by Automedon, Jan 18, 2025.

  1. Nicola Francesco Elia

    Nicola Francesco Elia Italy SotM Winner SotY Winner Subscriber

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    @Automedon sometimes the burner has stripped jet threads from the beginning. The gunk keeps it tight and we feel that when we dismantle it as found… after cleaning, when trying to install the jet back, it infinite turns without tightening and there’s little that can be done.

    Some have suggested brazing and a complicated burner surgery, that surely is a way, but it requires some expertise.

    Getting another burner is the immediate thinking.

    I would first try with a new jet as you’re doing and before any other drastic decision be aware that some special jets with tapered conical threads are available for sale on fogas.se. They are made to fit into stripped burners.

    Nicola
     
  2. Nicola Francesco Elia

    Nicola Francesco Elia Italy SotM Winner SotY Winner Subscriber

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    As you can see the conical tapered threads are meant to tighten on stripped burner seats.

    IMG_0028.jpeg

    Nicola
     
  3. Tony Press

    Tony Press Australia Subscriber

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    @Automedon

    The Base Camp (UK) may also have the nipples for stripped threads. I bought some from them years ago.

    Tony
     
  4. Blackdog

    Blackdog Netherlands SotM Winner Subscriber

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    Sadly, I'm not aware they sell the special taps which were made to allow this type of tapered thread nipple to be fitted correctly- see the special tap under 'second size nipples' on page 29 of the catalogue here.

    Without tapping first, just winding a tapered brass thread into an entirely different damaged parallel brass thread doesn't tend to end well- I've seen several references to failed attempts on here over the years. Has anybody succeeded without the tap?
     
  5. Moony Mark United Kingdom

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    Hi.. I'm a newbie to the wonders of the stove world, and am thoroughly enjoying myself so far.. quick question.. why do some inner caps have holes, and some don't..??.. I bought two #5's, and got the caps mixed up.. if I hadn't turned it off when I did, I'm convinced the outer cap would have melted.. thank you for your attention..
     
  6. nmp

    nmp SotM Winner Subscriber

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    @Moony Mark
    What made you think the outer cap was going to melt?

    Was the outer cap cherry red? (n0t neccesarily a problem)

    Was the stove making a loud noise when it was alight?

    If it was making a deep roaring noise the stove was under burning IE. burning fuel before it got to the outer cap in which case the outer cap would be damaged if the under burning was allowed to continue for too long.

    As to why some inner caps have holes in I do not know but I have a petrol fuelled 199 (Optimus) that has holes in the inner cap and it runs quite happily!
    No doubt someone more knowledgable will be along soon.

    Nick
     
  7. Tony Press

    Tony Press Australia Subscriber

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    The answer is here:


    Cheers

    Tony