| BBD with Feedback – Electronic version. Your carburetor would have wires going to it.BBD1 1/4″ Solid Fuel with Integral Choke – This means the automatic choke is attached to the carburetor. BBD 1 1/4″ Solid Fuel with Divorced Choke – This means the choke thermostat is in the manifold and not attached to the carburetor. There is a linkage that connects the choke to the carburetor.BBD 1 1/4″ with Divorced Choke – This means the choke thermostat is in the manifold and not attached to the carburetor. There is a linkage that connects the choke to the carburetor.BBD 1 1/2″ with Divorced Choke – This means the choke thermostat is in the manifold and not attached to the carburetor. There is a linkage that connects the choke to the carburetor. 
Free Carter BBD Manuals These manuals contain specifications, parts lists and instructions. The manuals can also be used to help identify those carburetors without
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There are new metering rods avaible for the BBD. If I recall some metering rods from, Holley will work for the BBD to.
Your link to the Carter BBD series parts manual does not work. Is the Carter P/N 75-2231 metering rod available? Do they have a history of wearing? If so can it all be compensated for by reducing the jet size. My BBD 8274S has gotten to where it is running very rich. My son and I have gone through it a couple of times now and can find nothing wrong other than we possibly need to install new jets. Just wondering if it should have/need new metering rods also. Carb has ~230,000 miles of use on it. It has been overhauled (more like cleaned) before but never had new jets installed.
Thanks for letting me know about the link. That should work now.
I doubt you will find new metering rods for the BBD, so changing the main jet is your choice. Use the spark plug color as your guide for correct jet sizes. Anything else could ruin your engine. Assuming your carburetor is clean and not flooding (that is a big assumption), check your plugs, which should be gray colored. Black means too much fuel. Reduce your jet size by 1 – 2 sizes and test again.
IF JET IS LITTLE BIGGER THAN 5/64 IN INSIDE DIAMETER WHAT IS ITS SIZE? ON MY JET IT IS STAMPED 390 I AM WANTING TO LEAN IT OUT WHICH I THINK MEANS GO SMALLER WHERE DO I START ON WHAT YOU SELL PLEASE HELP
>5/64″ = >.078″. Yes, lean would be a smaller jet size. Sorry, I don’t have a chart that correlates the jet stamp and size in the BBD case.
i have a 1956 plymouth belvedere with the 277cu. in. P29 engine which has the carter 2409S 4bb carb. i am looking for the manual and also the refurb kit.
can you help?
best regards
peter
You need this kit here: http://www.carburetor-parts.com/Carter_BBD_Carburetor_Kit_p/6034-1.htm
You will find the manual here: http://www.carburetor-blog.com/?page_id=335