Optimus 111B (I think)?

Discussion in 'Stove Forum' started by Ziradog, Jun 26, 2026 at 1:33 AM.

  1. Ziradog

    Ziradog Subscriber

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    Bought this today locally at a low price. The seller claimed it was an Optimus 8r, but it is obviously a 111. I think it is a 111B and the instructions with it say 111B or 22. Could someone confirm the model and if anything is obviously missing? The seller also said that he had test fired it and that it works, but it smells like it is full of very stale gasolene. I'll proactively replace the fuel cap gasket and the SRV pip. The pump seems to be working ok, it makes pressure and the handle doesn't creep back out. Should I proactvely replace the NRV gasket or wait and see? I know I'll need to buy/make an NRV wrench for that.

    Thanks.
     

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  2. itchy

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    111B from what can be seen in the first photo. A better picture of the burner without the flame ring and shield would make it clear. The 111B has two vertical supports for the flame spreader. The kerosene burning 111 has 4, 2 (I think) of which function to vaporize the fuel.

    I wouldn't fix anything that aint broke, but others feel differently. Although these were designed to burn gasoline you are better off with camp fuel/white gas of choice long term.
     
  3. HunterStovie United States

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    @Ziradog

    I've not had much luck replacing the SRV pip in the cap. As long as the cap gasket isn't hard and it seals, I would not worry about it. I would replace the NRV if the tank will not hold pressure. I normally pressurize my 111B for a few days and if the pump rod does not move and it holds pressure i go about my business and use the stove. If it does not, then you'll have to do a dunk test unless the problem is obvious.
     
  4. hikerduane

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    Every "B' that I have or had, needed the pip in the NRV replaced, gas seems to do that on these. May work for a bit as is, but would hate to see fuel leaking when you really need the stove working safely. I too never replace the pip in the SRV unless there is leakage there.
    Duane