Holley 1850 question
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Holley 1850 question

  1. #1
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    Default Holley 1850 question

    I have a 427 medium riser ford with duel 1850 carbs. I have the light springs and neither vac secondary is opening. Does this mean that both diaphrams are bad, or will that equalizer tube between the carbs keep one from opening if the other is bad. I just find it hard to believe that both quit working at the same time. Thanks, Richy.

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    gn7
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    One bad diaphram will keep both from opening. A leak anywhere in the entire seconary system will keep both from opening. Specially a leak in the line.



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    just pull em' off, push the rod into the housing, hold your finger on the hole with the
    little red gasket, and if the rod stays till ya let off, its good- like ya didn't know that
    already


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    Quote Originally Posted by MR. KILOWATT View Post
    I have a 427 medium riser ford with duel 1850 carbs. I have the light springs and neither vac secondary is opening. Does this mean that both diaphrams are bad, or will that equalizer tube between the carbs keep one from opening if the other is bad. I just find it hard to believe that both quit working at the same time. Thanks, Richy.
    What color spring do you have in the secondary diaphram?

  8. #6
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    Default Holley 1850 question

    Its been several years since I installed the springs, so I can't remember the color. I think I bought 2 packs of springs and used the lightest spring in each carb. Thanks for the reply's, I will try your suggestions and find out where the problem is. Richy.

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