We have included a carburetor adjustment needle assembly in the box, but it cannot be installed at this time due to insufficient thread depth on the carburetor body. Please do not use this carburetor adjustment needle assembly.The thread for installing the adjustment needle is: M10x1.
The carburetor's fuel inlet thread is incorrectly threaded to 1/8-28. The correct thread size is 1/8-27. If you need to replace the fuel fitting, please use a 1/8-27 tap to tap the carburetor's fuel inlet. Sorry for the inconvenience!
Retro style carburetor, designed by US mechanic.Manual choke carburetor.High Quality carburetor made especially for Chevrolet 6 cyl engines to replace original Rochester model B/BC 1bbl factory carburetors.
Top mounting for the air cleaner is 2 1/4" diameter.Replacement 1 Barrel Carburetor for Rochester B - N228
Modified type carburetors are suitable for ordering by mechanics who are very familiar with this carburetors.
Zenith 28/228 downdraft carburetors.Fits most 1937-1967 4cyl and 6cyl Chevy engines 192" up thru 260".Weighs about 5 pounds
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Vintage Rochester B/BC Model 1 barrel carburetor from 2024
Nominal CFM: 200-215. Engines up to 270ci
Overall height = 6 1/2"
Bore =1.507"
Elongated bolt holes fits manifolds with 2 11/16" and 2 15/16" ON CENTER bolt pattern
Venturi is 30mm. Flows fine for all single carb applications up to 270ci displacement.
Top mounting for the air cleaner is 2 1/4" diameter.
Inlet thread: 1/8th - 27 NPT