Carburetor - HOLLEY 6510-C 2-Bbl: Overhaul: Disassembly

On all models, remove fuel inlet fitting and filter. Remove mixture control (oxygen feedback) solenoid screw and lockwashers. Remove solenoid.
Remove retaining clips and choke operating rod. Remove bowl vent solenoid. Remove and discard bowl vent seal retainer, diaphragm, seal and spring. If damaged, remove choke plate shaft and levers.

Fig 1: Exploded View of Holley Model 6510-C Carburetor
Courtesy of GENERAL MOTORS CORP.
Use a file or grinder to remove choke retainer screw heads. Remove retaining ring and screws. Remove thermostat housing from choke housing. Remove choke housing screws. Remove choke housing shaft nut, lock washer, lever spring retainer and cam.
Remove choke diaphragm screws. Remove choke diaphragm cover and spring. Rotate choke diaphragm assembly and remove from housing. Remove vacuum adjustment screw plug (if equipped). Remove adjustment screw.
Remove accelerator pump cover, diaphragm and return spring. Remove throttle position sensor plunger from pump housing. See Fig 1 .
On all models, remove airhorn screws and airhorn. Remove float pin and float. Remove inlet needle/seat and gasket. Remove primary high speed bleed restriction and main well tube. Note size of restriction and tube.
Remove secondary high speed bleed restriction and well tube. Note size of restriction and tube. Remove primary and secondary main metering jets. Note jet sizes for reassembly. Remove pump discharge nozzle, gasket, check ball(s) and spring.