Primus No. 5 stove: please will you help me

Discussion in 'Stove Forum' started by Cam, Sep 17, 2019.

  1. Cam United Kingdom

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    I have the above-mentioned stove. It was my grandfather's and must be many years old.

    It does not burn properly, the flame does not turn blue (I also have another Opimus stove which I have used for 30 odd years so I know what the flame should look like)

    I would like to replace the nipple/jet and I will give the burner a good clean.

    Where can I obtain a new jet and the correct spanner to fasten it?

    What is best method to clean the inside of the burner?

    Any other advice would be gratefully received.

    Many thanks in advance.

    Cam
     
  2. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Last edited: Sep 17, 2019
  3. Cam United Kingdom

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    Many sincere thanks!

    I will take your advice!

    Thanks

    Cam
     
    Last edited by a moderator: Sep 17, 2019
  4. Cam United Kingdom

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    Hi

    I have used lemon juice and citric acid crystals to clean the tank and have revealed a serial no.: 171536

    Does the serial number give any indication of age?
     
  5. Simes

    Simes Subscriber

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  6. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Hi @Cam , is it possible that your number on you stove is 171556 ?

    Best Regards,
    Kerophile.
     
  7. Cam United Kingdom

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    Hi kerophile

    This stove was filthy! I have removed the crud using citric acid with a toothbrush and have revealed: -

    SV. No. 48624

    Eng. No. 171536

    Many thanks

    Cam
     
  8. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Hi @Cam . Neither 48624 nor 171536 are Primus dating codes, as you will have seen from the link provided by @Simes.

    They also do not look like relevant Primus ,Optimus or Sievert ( SVEA) parts numbers.

    Please define what you mean by the abbreviations SV No. and Eng No.

    A photograph of your stove and any markings would help us.

    Best Regards,
    Kerophile.
     
    Last edited: Sep 18, 2019
  9. abbahco1

    abbahco1 Subscriber

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    I have Primus stoves from the middle to late 1920s that have these English and Swedish patent numbers stamped into the top of the tank, around the riser tube.

    Peter
     
  10. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Hi Peter @abbahco1 . spot on!

    Primus No. 5 (N: 1924)

    Primus no 5 1927

    These are Patent Nos. on 1920s Primus stoves and are engraved around the central top of the tank.

    Swedish? PATENT SV. No 48624

    And a British? ENG. Patent , With no good photo of the numbers.

    So @Cam we have a likely date range for your Primus No.5 and it should be stamped with a letter (N, O, P, Or R) and number date code, inside a circle, at the centre of the bottom of the fuel tank.

    Have a look and tell us what you find.

    Best Regards,
    Kerophile.
     
    Last edited: Sep 19, 2019
  11. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    In this Post, @Ray123 explains what the Patents you report mean:

    “Beautiful stove! Too bad you can't find any good denatured alcohol or methylated spirits up in Canada.

    I wanted to mention that the patent numbers around the riser indicate the recessed filler cap. Primus was very proud of that modification. By recessing the filler, even when the tank was filled right to the top of the filler it still left some air space inside. SV 48624 is the Swedish patent number while ENG 171536 is the English.
    Good luck getting it running blue.

    Ray”

    From this Thread:

    1931 Primus No. 1, nickeled, regulated alcohol silent burner

    Best Regards,
    Kerophile.
     
  12. cmb56

    cmb56 Sweden Subscriber

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    This is the Swedish patent 48624 from 1919.

    Michael
     

    Attached Files:

  13. abbahco1

    abbahco1 Subscriber

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    Hi George! Hope all is well up North,

    Best, Peter
     
  14. ValorPhil

    ValorPhil Australia Subscriber

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    Hi all... just want to mention that my Primus No 1 with an O 37 stamp on the bottom of the tank also has the Patent Eng No: 171536... hope this helps in the Primus timelines
     
  15. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Hi @ValorPhil the O code indicates a 1925 manufacturing date and the Eng Patent No. 171536 fits in with the 1923 and 1927 dates of other Primus stoves with this particular form of Patent marking.
    Have you posted photos of your Primus No.1 in the Reference Gallery yet?

    Best Regards,
    Kerophile.