Zenith (STROMBERG) 4-Barrel Carburetors: Overhaul: Disassembly

Remove semi-automatic choke and bracket (if installed). Disconnect vacuum sensing tube. Remove screws attaching choke thermostatic housing to carburetor. Disconnect throttle safety return spring by turning counter lever counterclockwise. Remove throttle return spring.
From air horn, disconnect choke connecting rod by removing cotter pin, washer, and spring. Remove accelerator pump connecting rod by removing cotter pin. See Figure and Figure.
Remove bolt attaching fuel inlet fitting and remove fitting and filter. Remove screws which attach air horn to main body. Remove air horn being careful not to tear gasket.
From air horn, remove float retaining pin, float and needle assembly. Remove accelerator pump lever and piston. If equipped, remove starting assist fluid inlet fitting. Remove primary slow air bleeds.
From main body, remove accelerator pump spring, check ball and retainer plate. Remove idle switch, if installed, by removing attaching bolt and spring. Disconnect connecting rod from secondary operating diaphragm and remove diaphragm.
Remove screws attaching main body to throttle body. Remove accelerator pump injection nozzle, weight and check ball from main body. Remove all jets and air bleeds from main body. Remove power valve solenoid, if installed, by removing attaching screws.
From throttle body, remove mixture adjusting screw and throttle adjusting screw. Remove richer solenoid (if installed). Remove throttle lever attaching hardware.
NOTE: Before removing jets and air bleeds, write down position and number of each for reassembly reference.