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Thread: List 9210?

  1. #1

    Default List 9210?

    Has anyone ever worked on a Holley list 9210? I recently picked up a NOS one and I'm having a heck of a time tuning it and finding info on it. I have a Plymouth 318 I'm trying to use it on, and it's been idling way too high. I pulled it off and the primary throttle blades were open extremely far, so I started to close them to get the "square" from the transfer slot when I noticed my baseplate doesn't look like it has any idle passages or at least any above the transfer slot. Any ideas on this?
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  2. #2
    Join Date
    Jan 2010
    Brisbane, Australia


    Sounds like you have a "reverse idle carb" where the mixture screw controls the amount of air allowed into the circuit. So even when seated, it can only ever go as rich as the IFR will allow.

    Are the mixture screws on the metering block labeled with a sticker, or are they blunt tipped versus sharp tipped?

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