Carburetor, Holley, 850 CFM, Mechanical Secondary/Manual Choke

850-CFM Double Pumper Carburetor, Mechanical Secondaries, Manual Choke by Holley®

Dual accelerator pumps support throttle response, with center-hung floats and power-valve protection.

This 850-CFM Holley® Model 4150 Double Pumper carburetor combines mechanically operated secondaries, a manual choke and accelerator pumps for both primary and secondary operation. The additional pump shot supports the transition when the secondary throttles open. Center-hung floats help control bowl fuel level, while dual fuel inlets feed both bowls and power-valve blowout protection guards the enrichment circuit. Each carburetor is wet-flow tested before shipment. Four-corner idle adjustment provides a mixture adjustment at each throttle bore. Choose the shiny or classic gold finish. This street/strip gasoline carburetor is best matched to a properly selected engine, gearing and transmission combination, such as a manual transmission or an appropriate high-stall automatic; it is not a universal upgrade for every engine.

• 850-CFM Model 4150 four-barrel carburetor • Mechanical secondaries with manual choke • Dual accelerator pumps and fuel inlets • Center-hung fuel bowl floats • Power-valve blowout protection and wet-flow testing • Four-corner idle mixture adjustment • Shiny or classic gold finish options