Ford (AUTOLITE) 4-Barrel Models 4300: Description: Notes

Model 4300 carburetors are new design 3-piece body (air horn, main body, throttle body) 4-barrel carburetors with single fuel bowl for all barrels (concentric bowl with double float). Primary section has "idle air by-pass system" for idle speed adjustment (no throttle stopscrew) and a thermostatic type hot idle compensator (located on top of air horn between secondary barrels). Secondary section has spring-loaded air valves (located above secondary throttle valves) and are linked to a hydraulic dashpot to prevent air valve flutter or erratic operation. Secondary throttle valves are mechanically operated by the primary throttle linkage. This carburetor has the usual conventional fuel systems.