Project Big Steel: Carter 9635 Carburetor Rebuild 

"Luc - The Acadian Oppo" (luc5) 11/12/2015 at 15:56 • Filed to: PROJECT BIG STEEL

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Yesterday was the day I finally decided to rebuild my carburetor on my truck. I’ve had the parts for a few weeks but being the procrastinator that I am it had to sit for a while.

The Carb in question is a Carter 9635 625cfm 4 barrel. It took me about 4 months to figure out what the carb was as all this time I thought I still had the original Rochester Quadrajet on the truck. Only after carefully going over the vacuum diagram did I realize that I did not have the original carb at all since none of the hookups were at the same place.

Here is what it looked like prior to tear down. I had a bad stumble when I floored it from a dead stop and it would sometimes cause a backfire.

I took the whole thing apart to find that it was really in better shape than I thought. no blocked passages,no crud buildup or anything like that.

The only thing that seemed a little off was the accelerator pump. The best way to describe it is that it felt a bit “crunchy” as in not a very smooth up and down action as it would stick a little.

I put it all back together without too much fuss. The accelerator pump feels much MUCH better. I’ve also bought a inline fuel filter for the truck since it did not have any filter at all which I’m sure didn’t help anything. You see the Rochester Quadrajet has the fuel filter built directly into the carb. The Carter carb does not so you need to use an external fuel filter which was never on the truck for who knows how long.

I haven’t put the carb back on the truck yet so I don’t know it it’s better or not either way now at least I have peace of mind that it’s in good shape and functioning properly.

crowmolly > Luc - The Acadian Oppo 11/12/2015 at 15:59

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Looks good!

New fuel filter is not glass, right?

Birddog > Luc - The Acadian Oppo 11/12/2015 at 16:05

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Carter Carbs (Edelbrock too) make the best wheel chocks.

If only EssExTee could be so grossly incandescent > Luc - The Acadian Oppo 11/12/2015 at 16:14

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I’m in the same boat with our Wrangler. At some point before we got it someone ditched the nasty electronic Carter (a BBD, I think) for a Weber progressive 2bbl. Took me a few years to realize it wasn’t stock. It needs a good clean and tuneup but I’m too ascared to touch it.

Luc - The Acadian Oppo > crowmolly 11/12/2015 at 16:16

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Clear plastic.

I actually just learnt about that from Jeff from one of the Hoontruck videos.

Luc - The Acadian Oppo > Birddog 11/12/2015 at 16:19

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Since I’m new to the carburetor scene. In your opinion what would be a good carb?

Luc - The Acadian Oppo > If only EssExTee could be so grossly incandescent 11/12/2015 at 16:22

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With youtube it was a lot easier than I expected. I found a full Carter AFB rebuild vid that shows all the do’s and don’t’s. It probably took me an hour and a half from start to finish taking my sweet time.

If only EssExTee could be so grossly incandescent > Luc - The Acadian Oppo 11/12/2015 at 16:35

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The sticker on outs is worn off so I don’t know what model it is, but it’s different from a regular carb so I don’t know if the same basic tuning methods apply.

Luc - The Acadian Oppo > If only EssExTee could be so grossly incandescent 11/12/2015 at 16:47

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There must be a stamping on it somewhere. For mine there was no other markings other than “H88 9635” on the front left. I google it and lone behold: Carter 9635 625CFM carb.

I kept looking for the Rochester stamp number to order a rebuild kit and could not find it that’s when I figured out something wasn’t right.

If only EssExTee could be so grossly incandescent > Luc - The Acadian Oppo 11/12/2015 at 17:17

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I haven’t pulled it off to take a good look at it, because again I don’t know enough about carbs and am too afraid to mess it up. In addition to the normal carb complicatedness there’s whatever mechanism is used to shut off/activate the second barrel.

In a Mini; let them mock me as My Mini Countryman is higher than you > Luc - The Acadian Oppo 11/12/2015 at 17:56

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Edelbrock.

Holley.

SU if you're feeling more British than French

Birddog > Luc - The Acadian Oppo 11/12/2015 at 20:05

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Holley or one of it’s clones or go back to a Q-Jet. Those would be the best ways to go.

But only if this carb fails you after a rebuild. If it’s working why screw with it. My experience with Carter carbs just leaves me flat.

If you wanted to get fancy you can retrofit a TBI setup from an early 90s Chevy truck using almost all Junkyard parts.

MontegoMan562 is a Capri RS Owner > Birddog 11/13/2015 at 12:41

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I’m a Holley carb fan myself. It’s what I’m running on the Montego, I upped it to a 4 barrel