Need to oil accelerator pump before installation?

Fuel and Air Systems

  1. dibbons

    dibbons FABO Gold Member FABO Gold Member

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    I just rebuilt a Carter AFB for a 1965 Barracuda Formula S. The old purple colored accelerator pump seemed kind of a loose fit. Even the new purple colored pump was loose during installation, too. I used a Sorenson brand rebuild kit. Now that the carb is back on the car, I just read on the internet to make sure to "oil" the accelerator pump before installation, which I failed to do. I did notice there was no discharge from the pump today after I got the motor warmed up for the first time. But the funny thing is, when I drove it around, it seems to run and accelerate just fine. Anyway, if I did not "pre-oil" the accelerator pump, what will happen? And now I also wonder if the correct pump was included in the kit? (The carb was rebuilt by someone else previously). Thank you for any advice.
     
  2. OldmanRick

    OldmanRick Well-Known Member

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    I'm no AFB guru by any stretch, but if the above is what your looking for..... it sounds to me like you're good :D.
     
  3. 70aarcuda

    70aarcuda Master Hoader of SBM FABO Gold Member

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    usually after it has been in gasoline for awhile the pump will soften up and work....that is how it works on my eddy afb....which is now on the shelf...got tired of having to prime carb to get it started after it sit for a couple days...whereas the holley 3310 can go weeks and still fire up with no problems....
     
  4. Bad Sport

    Bad Sport HALF A BUBBLE OFF Staff Member FABO Gold Member

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    If I'm not mistaken, some accelerator pumps were made from leather. It is recommended to oil them to help soften/swell the leather upon assembly.

    I'm not sure the one you used is leather or not. I don't think they are used in kits anymore.
     
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    • RustyRatRod

      RustyRatRod Weenie idiot loser. FABO Gold Member

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      Yup. If it's leather, it needs to be oiled. I just dip them in ATF. If they are neoprene, I put a thin coat of Vasoline on them.

      Regardless, it should have a good STRONG stream of fuel out of the discharge nozzles when you push the throttle back. If it does not, something is wrong.
       
    • dibbons

      dibbons FABO Gold Member FABO Gold Member

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      Thanks, after I squirted some ATF around the accelerator pump a couple of times (without dis-assembly), it has now started to squirt. Actually, the throttle response seems to have improved also.
       
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      • oldpunko77

        oldpunko77 72 Dusta

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        How long let it sit in oil?
         
      • famous bob

        famous bob mopar misfit FABO Gold Member

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        Back in the day, I used to pull the leather ones out and oil and stretch the leather out ,like trying to make it bigger , worked every time , only had to do one over.
         
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        • oldpunko77

          oldpunko77 72 Dusta

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          I did just that seems it works much better.
           
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          • toolmanmike

            toolmanmike FABO Staff Staff Member FABO Gold Member

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            I don't believe the acc pump on the AFB's is bathed in gas like the Holley's is. They are on the bottom of the float bowl. That's the reason why.
             
          • toolmanmike

            toolmanmike FABO Staff Staff Member FABO Gold Member

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            Sure wouldn't hurt.
             
          • krazykuda

            krazykuda Well-Known Member FABO Gold Member How-To Section Editor

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            I have also used grease on the accelerator pump leather when I rebuild a carter afb or 2 bbl from a 318...
             
          • TrailBeast

            TrailBeast Slightly Twisted Member

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            And after all that the pump gets soaked in gas and the oil is gone.
            Oiling is only to swell the leather so it works right away and the new ones don't need anything at all unless you want to be really careful about sliding them into place and not nicking the lip.
             
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            • famous bob

              famous bob mopar misfit FABO Gold Member

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              I had to do a new one once, couldn't believe it , probly was an old kit that sat on a shelf a long time .
               
            • adriver

              adriver Blazing Apostle

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              All this talk about leather and oil and pumping and squirting on a 5 year old thread.
              What have I stumbled into this morning?
              (Stumbled, get it?)
               
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