Optimus 111b

Discussion in 'Stove Forum' started by Tez, Feb 16, 2026.

  1. Tez United Kingdom

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    Thank you black dog I will give that a go. Regarding the filler cap washer the original seal was in a recess at the bottom and to be honest a pig to get out. I had to break it up. The new one may not be down as far as I thought it find its place once screwed on
     

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  2. Blackdog

    Blackdog United Kingdom SotM Winner Subscriber

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    Any chance the filler cap could be bottoming out before the seal is actually compressed? Wouldn't expect problems from a Fettlebox seal if that's what it is...
     
  3. snwcmpr

    snwcmpr SotM Winner Subscriber

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    Better a leak in water/dunk test tgan leaking gasoline in a hot stove.
     
  4. Tez United Kingdom

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    Cheers guys your advice is very appreciated and taken on board. Think I have cracked it.
    https://youtube.com/shorts/JLffqwq7UWM?si=aFVr7D1n1ibalVSE

    Ready for the big fire up hopefully not literally. Can’t help now I have some understanding of this thing feeling a bit wary of it. All it’s going to take is bit of dirt on the thread of the fuel cap for vapour to escape. Which is what the issue was here
     
  5. hikerduane

    hikerduane Subscriber

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    I've known for years when out backpacking miles/kilometers from a vehicle or help, you take care of critical gear. Stove and a shelter at the top.
    Duane
     
  6. Blackdog

    Blackdog United Kingdom SotM Winner Subscriber

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    It just needs respect in use and sound, educated maintenance.

    The filler cap thread shouldn't affect pressure, which is retained by the sandwich of underide of filler cap, seal ad top of the filler neck.
     
  7. ArchMc

    ArchMc SotM Winner Subscriber

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    and boots.

    Your stove can save your life in cold / bad weather.

    Let us know how the fire-up goes.

    ....Arch
     
  8. Tez United Kingdom

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    Well it fired up and that’s an understatement
    I messed up the priming despite watching weeks of videos but next time I will get it right. So had a bit of flame up to kick off.
    Once it settled it roared away nicely
    Does not like wind but then what stoves do
    Maybe the trangia 25 and 27
    https://youtube.com/shorts/j0j6iY64E6w?si=Wn91tSZLykRrPt8B

    https://youtube.com/shorts/_ZEPWhsJ2HA?si=4kcyjFvR-9CcXOAA

    Made a cracking cuppa and felt safe enough. Also very sturdy in that box.
    Thanks for all the advice everyone
     

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  9. Tez United Kingdom

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    Pointed out to me I have misplaced the burner bell dam it . Can’t be far
     
  10. Blackdog

    Blackdog United Kingdom SotM Winner Subscriber

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    Thank you for the acknowledgement and sharing a photo of the stove up and running, it's good to see. Many people accept the help but don't understand that action shots are appreciated!
     
  11. ArchMc

    ArchMc SotM Winner Subscriber

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    Congrats on getting it going. 111's are beasts!

    ....Arch