Forums Forums Classic Carburettor Forum Weber Carbs how to tell they are matched

This topic contains 3 replies, has 2 voices, and was last updated by  ClassicCarbs 1 week, 4 days ago.

  • Author
    Posts
  • #318 Reply

    Turkey Lover
    Participant

    Hi,

    I’m looking for a used pair of Weber 42DCOE carbs. I’ve been told it’s essential they are a matched pair but I’m unsure what numbers should be replicated on the cover or how to tell by looking inside if they are a matched pair and they will work correctly together. Can anybody give some advice on this ?

  • #319 Reply

    ClassicCarbs
    Keymaster

    Hi, first, look at the carburettors, and see if they ‘look’ the same.
    AFter this the top covers should have serial numbers.
    This can vary a lot.

    if you have something like 12345 & 13583, they are matched.

    If you have one with ‘2A’ and another with ‘12345’ for example, they are not matched.

    After this, you still need to look at the subtle features on the carburettors to establish they are matched or not.

    Thanks,
    Emmanuel

  • #320 Reply

    Turkey Lover
    Participant

    Thanks for the info, I heard from another owner today that checking for the number of holes in the progression drillings gives a comparison between carbs showing if they are matched. How big a dia are these holes likely to be ?

    Thanks Mick

  • #323 Reply

    ClassicCarbs
    Keymaster

    Mick, the progression holes vary in number, size and position.

    I cannot tell you more about them, as i do not know.

    Thanks,

    Emmanuel

Reply To: Weber Carbs how to tell they are matched
Your information: