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Thread: Holley Vacuum Secondary...

  1. #1
    probablecause
    Just to confirm, I should not be able to force open the vacuum secondaries on my Holley?

  2. #2
    Fiat48
    unless you open the primary butterflys all the way.

  3. #3
    Senior Member
    Join Date
    Feb 2009
    Posts
    2,626
    There is an "L" shaped link between the primary throttle arm and the secondary throttle shaft. This prevent the secondaries from opening at idle, or more than partially, until the primaries are wide open. Open the primaries all the way and you will be able to open the secondaries all the way by hand. With a little effort you can open the secondaries, without first opening the primaries, which will then force the primaries open by way of the linkage rod.
    Don't let drunks ride in the back of a boat with an exposed engine if they know this info.

  4. #4
    centerhill condor
    Don't let drunks ride in the back of a boat with an exposed engine if they know this info.

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