Enders Nº 312, Neptun

Discussion in 'Enders' started by pau-i-amor, Sep 26, 2020.

  1. pau-i-amor

    pau-i-amor Subscriber

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    I've been looking for this stove for a long time!

    First at all, Thanks @Russenjesus for your tricks:

    Petromax Manometer:
    adapter for Neptun/PX Manometer
    I'll put a Petromax gauge.

    NRV:
    adapter for Neptun/PX Manometer
    I've already changed the NRV

    Leather cup:
    a new pumpshaft for Enders Neptun for leather pumpcups
    ... I found a good size O-ring. I greased it and runs! For me is ok.


    IMG20200926193040.jpg

    IMG20200926193101.jpg

    IMG20200926193004.jpg

    Enders 312 is similar than Optimus 155, but quick lighters burn butane/propane.

    As usual, stove is dirty...

    IMG20200921202423.jpg

    Butane/propane tank and pipes are orange color painted.

    IMG20200921205300.jpg

    I disassembled butane/propane quick lighters system. You can fill this tank with a gas lighter refill.

    IMG20200921205306.jpg

    You can see the butane tap and carburetor.

    IMG20200922200523.jpg IMG20200922200756.jpg

    I exchanged the NRV valve. I sealed the NRV with a drop of soft threadlocker.

    I made a new grub screw for Butane tap.

    IMG20200923190848.jpg IMG20200923190855.jpg IMG20200923193605.jpg

    ...and I replaced most of seals and gaskets.

    Quick lighters on:

    IMG20200926193008.jpg

    Both burners on:

    IMG20200926192841.jpg
    Simmer...

    IMG20200926192914.jpg

    Full load...
    IMG20200926192921.jpg
     
  2. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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  3. Justinburnett United States

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    Being new to these types of drives, where did you get the nrv valve and pump shaft? Are they the same size as a different stove?
     
  4. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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  5. pau-i-amor

    pau-i-amor Subscriber

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    @Justinburnett

    Spare NRV is common, classic, Primus valve, easy to find it on the Bay. Maybe thread is not exactly equal, but you can turn the NRV two o three turns. For me, it seems not enough and I sealed the thread with a drop of soft threadlocker.

    I've two sets of o-rings (metric and imperial) and I choosed which o-rings run ok in the pump (trial and error process ;)).
     
  6. pau-i-amor

    pau-i-amor Subscriber

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    Optimus 155 burners are BETTER than Enders 312 burners!
     
  7. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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    @pau-i-amor Why, Pau? (Speaking as an Optimus 155 fan)

    John
     
  8. Justinburnett United States

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    Thank you for the info.
    I’m just new to these stoves and while I finally got mine running well, I worry about needing to replace anything without easily available parts.
     
  9. pau-i-amor

    pau-i-amor Subscriber

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    [​IMG]

    IMO, Optimus 207 is best choice. Four arms. Easy and fast priming, even when you burn meths, because it has major surface.

    Optimus 9007 is good for priming with quick lighters when flame shoots this flat face. You have to prime twice with meths...

    Enders 312 burners need arround two minutes quick lighter flame for priming... and I don't try to prim with meth!
     
  10. Justinburnett United States

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    Are the optimus 207 burners able to be directly exchanged, or is the threading different?
    The Enders burners are very difficult to preheat without the butane lighter. I tried with alcohol and eventually got them hot enough but it took a long time.
     
  11. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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    Interesting, thanks for the explanation and the photo @pau-i-amor

    I recall something of the kind, difficult pre-heating, being discussed in THIS post, which concerned Hanse (Germany) brand burners.

    Hanse burner, a big chunk of metal to pre-heat.

    FA7028BA-9C6C-4BFD-9E3C-0B3FD6A1E0BE.jpeg

    @Justinburnett
     
  12. pau-i-amor

    pau-i-amor Subscriber

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    @Justinburnett

    Maybe thread to spindle axle lenght is diferent between Optimus and Enders burners...

    distancies.jpg
     
  13. Justinburnett United States

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    I think that wouldn’t be too much concern as long as the threads are the same. If needed I could raise the cooking surface slightly.

    are the burners available to purchase somewhere, or would I have to keep an eye out on eBay and just hope for good luck?
     
  14. pau-i-amor

    pau-i-amor Subscriber

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    Unfortunately, Enders 312 and Optimus 155 burners have different thread... :( My Frankiestove project is... Fiasco!

    IMG20200928203559.jpg
     
  15. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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    What was it?
     
  16. Justinburnett United States

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    Ahhh shame
    Perhaps an adapter could be made, though it would increase the burner height even more
     
  17. pau-i-amor

    pau-i-amor Subscriber

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    Exchange Enders burner by Optimus 155 burner (#207).

    @Justinburnett Optimus burner is higher than Enders. An thread adaptor maybe a problem. I'm thinking to exchange this set (green painted):

    modificació Enders..jpg

    by this one:

    modificacio optimus.jpg
     
  18. Justinburnett United States

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    Oh that’s a great idea! Hopefully it works!
     
  19. Justinburnett United States

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    You wouldn’t happen to know what the threads are for the burners on a Kenyon alcohol stove would you?
     
  20. pau-i-amor

    pau-i-amor Subscriber

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    No. Sorry.