Swapping Holley Electric Choke to Manual Choke for Total Control

Holley Carburetor

Steve at Smackey’s Garage is taking control — taking control over the electric choke on the Holley 750 cfm Double Pumper carburetor that feeds his 390 Big Block 4-Speed 1969 Ford Mustang Mach 1.

It’s out with the electric choke and in with the manual choke with Holley’s Manual Choke Conversion Kit. All the parts required for a fast, easy changeover to hand choke operation. The installation instructions don’t include any visuals of how it should be set up, so this video should help…

Holley Manual Choke Conversion Kit

Holley Manual Choke Conversion Kit — Part Number: 45-225

All the parts required for a fast, easy changeover to hand choke operation. For all carburetor models 2300, 4150 and 4160.


  • Includes Mounting Hardware
  • Standard Finish

Installation Instructions

Holley 4150 Double Pumper Carburetor with Manual Choke

Holley 4150 Double Pumper carburetors are a perfect upgrade for hot street cars and race vehicles — they’re an American icon when it comes to performance. From their roots as the premier carb on many factory muscle cars, to powering thousands of vehicles across the finish line, the Double Pumper is a great choice — whether you’re burning up the street or the quarter-mile.

The Double Pumper is designed for use on lightweight vehicles with a manual transmission — or an automatic transmission with a high stall and low rear-end gears. These carburetors are available in a gold dichromate or tumble polished shiny finish, along with these features: Dual accelerator pumps for additional fuel under initial acceleration; mechanical secondaries for great performance; dual feed fuel inlets for constant high-volume fuel delivery.