Autolite 4100 Float Level

  • Having a hesitation problem on launch with the 4100 on my K.

    Gonna check the float levels.

    What is the correct level for the primary float?

    I read a post on VMF calling for .875 primary and 1" secondary.

    The carb is a 1.12 Hipo clone I recently purchased from Pony Carbs in

    New Mexico.

    Thanks for the feedback.


    Edited by - SixT5HiPo on 01/14/2010 11:57:43

  • An off-idle stumble could also be attributed to a lean idle mixture or an accelerator pump. In general, the ignition system should be checked before the fuel system. Recommend that you double check the mechanical distributor advance and the initial timing before jumping into the carburetor. If timing is OK be sure you have the idle mixture set correctly. If that doesn't improve the situation and you are convinced it's the float level you should call Jon at Pony. He usually replaces the OEM brass floats with a Nitryl unit and may have his own setting.


    Edited by - round2K on 01/14/2010 09:25:49

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