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Norton Mark

Discussion in 'Other Norton Motorcycles' started by nortonmark, Mar 3, 2019.

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  1. nortonmark

    nortonmark

    Joined:
    Oct 18, 2018
    Anyone know what p/n for single carb manifold is for Mercury?
     
  2. Paul W.

    Paul W.

    Joined:
    May 12, 2018
    Are you looking for one, or just need a part number?
     
  3. nortonmark

    nortonmark

    Joined:
    Oct 18, 2018
    Both!
    Mark
     
  4. Bernhard

    Bernhard

    Joined:
    Apr 20, 2011
    If you use a single carb m/fold don't forget the two split sleeves that are inserted in the inlet ports!
     
  5. nortonmark

    nortonmark

    Joined:
    Oct 18, 2018
    When I had my 64 Atlas I found this manifold for single carb on the vertical twins, that was my indeed a norton part
    I do not remember this split sleeves part
    Mark
     
  6. triumph2

    triumph2

    Joined:
    Aug 13, 2008
    No inserts in the Mercury intake ports.
     
  7. lcrken

    lcrken VIP MEMBER

    Joined:
    Mar 15, 2009
    The factory parts books aren't much help, are they? The ones for '63-'65 and '66-'68 show the numbers for pretty much everything else. The sleeves Bernhard mentioned are listed for '66-'67 650SS in one parts list, and for 88ss and 650 in another. They are part no. 23864. The manifold is shown in Plate A as item number 27 in the '63-'65 parts list, but does not show up in the associated list of parts. That's the same plate that Andover shows in their parts diagrams, and they also don't have a listing for the manifold.

    However, I found a couple of part numbers in earlier ('61-'62) lists that show part numbers for the manifold. The manifold mentioned above as A27 is listed as part number 22757 and used on models 88 and 99, Std. and De Luxe. There is also a supplement to that list for models 88ss, 99ss, and 650ss that lists an intake manifold part number 23739 as used on '61 88ss and '61/'62 99ss.

    Hope that helps.

    Ken
     
  8. dynodave

    dynodave

    Joined:
    May 28, 2003
    The 2 into one manifold on downdraft heads is for first year 62 (partial) atlas and are quite rare. They may have resurrected the same part for the mercury. I have never been able to score one....

    below: 23739 is for pre down draft heads
    61 88SS, 61-62 99SS

    [​IMG]

    22757 2 into 1 for pre downdraft heads 1949-1962

    [​IMG]
     
    Last edited: Mar 4, 2019
  9. triumph2

    triumph2

    Joined:
    Aug 13, 2008
    I have a complete engine/gearbox assembly sitting on my bench. If it weren't -16 I'd go check it out and take some pix. hopefully by the weekend it'll warm up
     
    Paul W. likes this.
  10. triumph2

    triumph2

    Joined:
    Aug 13, 2008
    23358, may be a casting number. Pics to follow tomorrow.
     
  11. Peavey Jeltz

    Peavey Jeltz

    Joined:
    Jan 12, 2019
    My '62 Atlas (titled as '63) came with a 2-1 manifold and a 389/87 Monoblock. I always assumed this was original kit. I read the casting number as X23356. Not for sale, someday soon the head will come back from the menders.
    [​IMG]
     
  12. nortonmews

    nortonmews

    Joined:
    Nov 20, 2015
  13. triumph2

    triumph2

    Joined:
    Aug 13, 2008
  14. triumph2

    triumph2

    Joined:
    Aug 13, 2008
  15. triumph2

    triumph2

    Joined:
    Aug 13, 2008
  16. triumph2

    triumph2

    Joined:
    Aug 13, 2008
  17. Paul W.

    Paul W.

    Joined:
    May 12, 2018
    I have one stamped 23356, no X preceding the number. It has a three stamped on the opposite side.
     
  18. triumph2

    triumph2

    Joined:
    Aug 13, 2008
    If you look closely at my pictures that is what I have. I think the last number is an eight
     
    dynodave likes this.

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