111 T

Discussion in 'Stove Forum' started by MedicineMan4040, May 19, 2019.

  1. MedicineMan4040

    MedicineMan4040 Subscriber

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    Walked into a military surplus store looking for camo netting and walked out with what appears to be a primo Optimus 111T.
    No dents, no dings but you can tell the stove is just plain old :)
    Now I will say the seller stated it is a 111 T but the label on the stove only says 111, so could it actually be a T ??
    Regardless I cannot tell how long this stove has been in storage or how much use it ever had. Truthfully by the looks of it very little.

    Please tell me the step by steps in what you would look for in first firing this stove up.
    I'm used to the Optimus 99R, carried on backpacking for years, so I assume the firing up steps are the same....just been a while.

    If it is a T, the preferred fuel is kerosene, correct?
    I've got Coleman at home and think I'll try it first.

    Thanks for suggestions/clues and please tell me the easy way to tell if it is plain 111 or 111 T.
    Robert
     
    Last edited: May 19, 2019
  2. Tony Press

    Tony Press Australia Subscriber

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    Robert

    A photo of your stove, particularly the burner, would be helpful.

    1. Make sure the filler cap seal has not hardened;

    2. Check that it holds pressure before you put Coleman fuel in it; dunk it in warm water to test for leaks;

    3. Make sure the fuel does not come back up the pump tube when you pressurise the tank (before you light it).

    If the jet in the nipple is significantly larger than your 99R, it is set up for alcohol.

    I prefer to use kerosene in the Optimus 111 because it does not have a check valve, just a standard Primus-type non-return valve.

    Cheers

    Tony



    @MedicineMan4040
     
  3. cmb56

    cmb56 Sweden Subscriber

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    @MedicineMan4040

    The 111 has a roarer burner and the 111T has a silent burner.

    If it is a 111T and you got it complete there should be two nipples/jets and two restrictor tubes (or one two-way restrictor tube).

    One nipple/jet for kerosene and gasoline and one for alcohol.
    One restrictor tube for gasoline and one for alcohol.

    Regarding later instructions from Optimus, diesel can also be used.
    It does, I have tested.
    Kerosene burn better but as an emergency fuel diesel can be used.

    Michael
     
  4. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Hi, Welcome to CCS.
    you seem to have made a lucky acquisition.

    Tony has offered you sound advice on the checks you need to carry out before fuelling and lighting up this now elderly stove.

    If you look in the Reference Gallery you will see several posts of the Optimus 111T and other members or the extended family of Op.111s.

    Here are some photos of my Op.111T. Have a look as to how the main features compare with yours:

    Optimus 111T shown with roarer and silent burners

    Here is a link to an ex-Military Op.111T which shows the restrictor tube used with different fuels:

    Op.111 Hiker ex British Military.

    I do not know how familiar you are with silent burner stoves. There is a procedure for starting them up without causing the dreaded “underburn” which can quickly cause severe damage to the burner. Here are some tips:

    Hi, the way to avoid underburn is to never allow ignition of the flammable mixture under the outer cap.

    1. Pre-heat the burner with absolutely no pressure in the tank.

    2. Allow the pre-heat flame to totally extinguish.

    3. Quickly close the air release, and pump the tank 10-15 pump strokes.

    4. You should get clouds of white paraffin vapour/air mixture exit the many holes in the outer cap.

    5. Only now should you light this mixture with a match or flame applied above the outer cap.

    6. After 2-3 minutes of successful burn you can increase pressure gradually until full power is achieved.

    7. If, on lighting, the burner immediately reverts to underburn, release tank pressure and start the whole process again.

    8. If you get underburn on the second attempt.....Give up stoves and take up stamp collecting.

    Best Regards,
    Kerophile.
     
    Last edited: May 19, 2019
  5. MedicineMan4040

    MedicineMan4040 Subscriber

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    Incredible replies all.
    Lots to go over and study and will do in short course.
    Thanks again and pics will be coming when time allows.
    Also, per the link to Kerophiles images I do have the silent burner.
    Looking at the pics linked for restrictor tubes didn't give me a good idea
    of where they actually are :(
     
    Last edited: May 19, 2019
  6. MedicineMan4040

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    Forgot to say thanks to Tony for all the safety tips.
    After reading them I think I'll go to the store and pick up a bottle (probably a gallon) of kerosene. In case things aren't so well it would be a safer alternative for disaster ;)
    I will visually inspect the rings, and pretend I know what to look for and the water/pressure test sounds really smart.
    I'm currently in the hospital working so can't image the stove just yet.
    Also, I found a BernieDawgStove googling. Seems he would be known on this site? Is he in the USA? I've already written him asking about options on a paint job!
     
  7. Afterburner

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  8. MedicineMan4040

    MedicineMan4040 Subscriber

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    1.jpg 2.jpg 3.jpg 4.jpg 5.jpg 6.jpg 7.jpg 8.jpg
     
    Last edited by a moderator: May 20, 2019
  9. MedicineMan4040

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    In regard to the above how did I do for $120.00 ???
    Not too bad shape eh BUT no extra jets.
    The cleaning needle transit is smooth. I didn't set up a macro shot but the needle is there and the up/down motion
    is smooth.
     
  10. MedicineMan4040

    MedicineMan4040 Subscriber

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    Another question.
    Assuming nothing has changed from when it was removed from the box, what
    fuel is it set up for?
    Hoping kerosene.
     
  11. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Hi @MedicineMan4040 The stove looks unused to me. No visible evidence of heat discolouration or carbon deposits.
    The exterior of the case does show signs of corrosion and paint removal, but its did its job of protecting the contents.

    It seems likely that the stove will be jetted for kerosene, so once you have carried out the pre-flight checks recommended by Tony, you should be good to try the stove out. Remember to leave an air-space in the tank, so no more than 3/4 full of fuel.

    Best Regards,
    Kerophile.
     
  12. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Info on the correct restrictors and jets to be used with gasoline and alcohol is given in the stove operating instructions:

    1980s-111t-hiker.35954

    if all else fails, read the instructions.
    Regards,
    Kerophile.
     
  13. MedicineMan4040

    MedicineMan4040 Subscriber

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    Kerophile thanks. Picked up a bottle of kero today.....Wednesday when my rotation ends at work I'll go through the pre-flight test and give it a whirl.
    I plan to do this outside and away from any combustibles ;)
     
  14. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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  15. Murph

    Murph United States Subscriber

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    Yes, he is in the US.

    Yes, he is known on this site, and used to be a member.

    Leave it at that, eh?

    Murph
     
  16. Tony Press

    Tony Press Australia Subscriber

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    Robert

    Bernie is in the US of A.

    Paint: Use any good automotive enamel. Let it cure fully, or bake it, but as your stove looks unused, I’d be happy to leave as is.

    If you use your stove the paint will get scorched anyway. Make an aluminium tray from a drink can or baking tray to go on the bottom of the tin.


    Cheers

    Tony
     
  17. MedicineMan4040

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    Thanks again gents. Yes this stove is to be used (paddle camping where weight not so much an issue). I do think I'll sand the rusty spots and apply something just to slow down the oxidation process.
    Aluminum tray under the tin? You mean under the cup that holds the priming fluid?
    I've seen that in some images while perusing this site. Looks like a 4 or 5 min job. I might even go exotic and use aluminum diamond plate :)
    Robert
     
  18. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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  19. afoton

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    'For Kerosene, White Gasoline, Alcohol' = triple fuel => T, so 111T ;)
     
  20. Afterburner

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    Gasoline/petrol/White Spirit in Swedish is 'Bensin' so Gasoline/petrol/White Spirit operated 111 is 111B. Am I right?