1933 6 cyl carb linkage

tigermoth
tigermoth Expert Adviser
in Essex Super 6

The carb linkage geometry on my ‘33 Essex Terraplane Six results in a less than smooth accelerator pedal. I will attach a pic. I would appreciate a pic of what the linkage should look like at the carb. Currently it requires a big push of the pedal to get it off idle.

Comments

  • tigermoth
    tigermoth Expert Adviser

    Sadly I do not know how to resuze a pic to accommodate this site. If someone is able to post a pic of their linkage that would be helpful to me.

    thank you

    regards, Tom

  • tigermoth
    tigermoth Expert Adviser

    Anyone with a 1933 that can post a picture of their linkage? It would be greatly appreciated. I think it is similar, if not identical to ‘34 and ‘35 throttle linkages.

    Thank you.


    regards, Tom

  • 5433HET
    5433HET Expert Adviser

    Here you go!

    Messenger_creation_D9F46BB8-D34E-44B6-95AF-775D95D88B54.jpeg
    Messenger_creation_E31C846C-60AB-4103-A37A-B6803B39FDCC.jpeg


  • tigermoth
    tigermoth Expert Adviser

    Thank you!

    I suspected the previous owner/restorer fabricated parts (which I don’t understand as original parts can be found). I see now he fabricated them incorrectly so as to create angles of action that keep the linkage from giving smooth accelerator pedal action.

    regards, Tom

  • tigermoth
    tigermoth Expert Adviser

    What is the function of the pipe attached to the air box/ intake manifold in your picture. I have only seen that port capped off.

    image.jpeg

    Regards, Tom

  • paulrhd29nz
    paulrhd29nz Member

    Likely for a vacuum gauge

  • terraplane8
    terraplane8 Senior Contributor

    Vacuum clutch?

  • tigermoth
    tigermoth Expert Adviser

    That is a big pipe. For either of those possibilities , why run the pipe forward?


    regards, Tom

  • 5433HET
    5433HET Expert Adviser

    Vacuum clutch. The tubing has to come across the top of the engine for that angle.

  • tigermoth
    tigermoth Expert Adviser

    Aahhh… thank you.,only time I have seen a fitting in the port.


    thank you


    regards, Tom

  • tigermoth
    tigermoth Expert Adviser

    Thanks to all. I was able to reconstruct a period linkage assembly, from parts in my spares and new mfg plus a small fitting purchase.

    Now to sort out why the previous owners installed Carter W1-574S that I rebuilt is dumping fuel from the main nozzle at any throttle setting above idle.

    regards, Tom

  • bob ward
    bob ward Senior Contributor

    If you are missing the very fine jet in the accelerator pump circuit that will create the problem you are seeing.

  • tigermoth
    tigermoth Expert Adviser

    Bob, In this model Carter carb W1-574S, to which jet are you referring? Using the overhaul kit instructions all the jets appear to be accounted for.

    I reset the float level from the book 1/2” to 7/16” and found the correct metering rod setting. It appears to have solved the issue. I advanced the timing from the mark on the flywheel so it has more of a top end now.


    regards, Tom

  • bob ward
    bob ward Senior Contributor

    I'm referencing a 310S, there may well be changes between models. FWIW, and its been a few years since I did the rebuild, there were I think 3 items in the output circuit from the accelerator pump, a ball valve, a very fine jet and a plug.

  • tigermoth
    tigermoth Expert Adviser

    Thank you Bob.


    regards, Tom

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