Optimus No: 99

Discussion in 'Optimus No:99' started by Simes, Nov 30, 2019.

  1. Simes

    Simes Subscriber

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    My sadly unfettled 99, it works after a fashion with a bit of persuation.

    WP_20191130_15_54_51_Pro.jpg

    It actually arrived with a mini pump bit no pot gripper.

    WP_20191130_15_56_14_Pro.jpg

    It does need a little effort to get going, both pumping up and a generous prime.

    WP_20191130_16_01_35_Pro.jpg

    WP_20191130_16_02_22_Pro.jpg

    Here showing for a tea test.

    WP_20191130_16_06_17_Pro.jpg

    Flame lopsided and it pulses at about 1 beat a second. It certainly needs a complete rebuild at some point.

    WP_20191130_16_06_17_Pro.jpg

    WP_20191130_16_09_49_Pro.jpg

    Since the last time I used it it seems to work a little better, if pump gas has been used the wick may have cleaned up a little with being soaked in naptha for the time it's been sat on the naughty shelf.
     

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  2. Harder D. Soerensen

    Harder D. Soerensen Denmark Subscriber

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    Great little stove.
    Regarding pumping I learned that the NRV part in the filling lid can be a challenge to get to operate properly if the spring hardens up or the pipholder gets a bit stuck
     
  3. Simes

    Simes Subscriber

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  4. JP2

    JP2 Subscriber

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    Lol, WHY can you fixed a 99 and not a 8r. ???????
     
  5. SveaSizzler

    SveaSizzler United States Subscriber

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    I haven't fettled my 99 either. It runs hot and drips gas from the stuffing box occasionally. The key is also a bit stiff. I have the parts lined up. Just lazy, or work keeps getting in my way.
     
  6. snwcmpr

    snwcmpr Subscriber

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    Do not use a liquid or paste type lubricant on the pump. It will gum up the works. Just graphite powder.You will find it as a lock lubricant.

    Full fettle of this is usually just a filler cap seal and a pip. Easy Peasy. Rarely, the wick.

    You are also missing the windscreen.
     
  7. Simes

    Simes Subscriber

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    @JP2, it's running as I received it, just not very well, I'm trying to find the same time that @SveaSizzler is to give it a closer look.

    The 8rs refused to run at all iirc and due to age and conditiin I've decided a complete strip down is the best option. If I'm going to do the job the least I can do is the best I can.

    Ken I can't think what else is causing the slow pulsing other than the wick, it maintains pressure and the 'full' on the cycle is good???
     
  8. snwcmpr

    snwcmpr Subscriber

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    Ok, I only mentioned that because you said unfettled. Cap and pip are good, leaves only the wick.
    I would run a few tanks of clean fuel, let it get hot, before I chance damaging the pipe, or tank, changing the wick. We read here of those stories.
     
  9. Simes

    Simes Subscriber

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    While I have it out I think I'll take your advice Ken and run it under close supervision, I was tempted after mentioning that it seemed to be running better than I remembered.
     
  10. EemeHyss Ukraine

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    I hope the experiment was successful..
     
  11. Simes

    Simes Subscriber

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    @EemeHyss @snwcmpr

    I thought you deserved a bit of an update. Some shots after a couple of tanks of fuel.

    WP_20191231_11_34_59_Pro.jpg

    WP_20191231_11_34_51_Pro.jpg

    Running quite a bit better but still more asthmatic than I would like. I think the images show the unbalanced flame and it's now developed a leak at the spindle which'll need a tweak.

    I've also noticed when turned fully clockwise the flame heads out of the bell sideways.

    Time.to dismantle and look at the burner.

    iirc there is a thread somewhere on making replacement screens for the 99.

    I'll try and remember to include a flake in the next pictures.
     
  12. snwcmpr

    snwcmpr Subscriber

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    Can you burn it outside the box and away from the pot stands to remove them from the equation?
    Then look for alignment. I had a 99 that was badly angled. It required some alignment adjustment.
     
  13. Simes

    Simes Subscriber

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    Thanks for the suggestion Ken, I'm pretty sure I'll uncover things to correct once I have it apart. I didn't pay a great deal for it originally and lucky I'm not trying to find one in the current market.

    The previous owner probably didn't really have the ability to fix the issues that I'm now addressing so decided to sell, whether or not I kept any original paper work from the time is probably unlikely.

    Oh, and it also leaks through the oburner fixing point when priming.

    Nothing that can't be fixed time permitting. :)