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Old 09-16-2019, 11:21 AM   #5
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Join Date: Jun 2010
Location: Detroit suburb, MI
Posts: 2,635
Default Re: Holley 94 accelerator pump helper spring

I've seen that spring below the pump piston in a few carbs. I agree it's not in any parts drawings. If the hole in the throttle lever for the pump link is worn (or the pin on the link is worn) it can cause some slop and the throttle will move slightly before the pump piston goes down. The helper spring can help take up the slop and make the pump react quicker. That's the only advantage I see to the spring. Also it doesn't hurt anything being in there.


Last edited by scicala; 09-16-2019 at 05:45 PM.
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