Carter AVS, 4 Barrel Carburetor

The AVS carburetor is often mistaken for an AFB carburetor. The AVS will not have secondary boosters and there will be a spring loaded air valve located on the top of the sceondary air horn. The AVS also uses a metering rod cover that is not flat like the
AFB.AVSFind parts for the Carter AVS carburetor.

1968 Chrysler products carburetor kit.

1969-71 Chrysler products carburetor kit.

1966 Chevrolet & marine carburetor kit.

Carburetor IdAVS Carburetorentification

Free Carter AVS Manuals1968-69 AVS Carburetor

I started to take apart a Carter AVS Carb  #6117s. Its off of a 1972 Chris Craft 350.    There are no metering rods were I expected them to be in fact the holes they would go thru appear to be blocked off? And there are no tapped holes for the metering rod covers.    Is there a chance that the Marine version of the AVS didn’t have them?  I am quite concerned about this being rebuild able at this point

I found out that the 6117S  was revised to 6117SA  and the metering rods were removed.  They found that the metering rods were chattering and that the difference between the metering rod engaged or not was only .003 so they put out a service bulletin to remove them.  My carb indeed does have the 6117SA stamp on it.

8 thoughts on “Carter AVS, 4 Barrel Carburetor

  1. Hi, I am a guy rebuilding AVS JO 4966S to -71 Challenger.
    I bought it from Rock auto, it was nice looking carburetor but all jets were frozen so I had to drill the jets out. I have not found any places to buy new primary jets so I made them by my self.
    My question is about primary jets sizes. I found the technical bulletin of -71 cid 383HP and it says the primary jets should be 120-489.
    Is the orifice .089? Or is it .189?
    I read some place that jets under #399 are the decimal size of the last two digits and the jets #400 and larger 1.00 plus the last two digits of the number.
    Step up rods is 16-572 and the bulletin says rods should be from 16-546 to 16-574.

    Thanks and best regards Ilkka Häkälä

    • 120-489 is .089 The 4 apparently designates the taller AVS primary
      jet. A 120-398 would be a .098 lower profile AVS secondary jet.

  2. Hello. I have a Carter AVS 4611s carb. I believe it is off a 69 Dodge Dart Swinger. Before I rebuild it, could you please tell me what the CFM is on this carb? And which rebuild kit no. would I want? Thank you.

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