Carter M4566 Mechanical Fuel Pump

Carter M4566 Mechanical Fuel Pump for Pontiac

The Carter M4566 is a mechanical fuel pump built for classic Pontiac applications that need steady fuel delivery and OE-style fit, form, and function. It is a direct replacement choice for restorations and maintenance on select Pontiac Catalina, Grand Prix, GTO, LeMans, Tempest, and Bonneville models.

Key Features

• Mechanical fuel pump design for carbureted fuel systems
• Tube inlet and threaded outlet for traditional Pontiac fuel line routing
• 1/4 NPFS outlet fitting thread size
• Minimum flow rating of 23
• Operating pressure range of 5.5 to 7 psi
• Gasket or seal included for installation prep
• OE fit, form, and function focus from Carter Fuel Systems

Detailed Description

Carter M4566 is engineered as a mechanical fuel pump for classic Pontiac vehicles that rely on a cam-driven fuel delivery setup. The pump uses a tube inlet and a threaded outlet with a 1/4 NPFS fitting, making it a practical replacement for original-style fuel system layouts. With a pressure range of 5.5 to 7 psi and a minimum flow rating of 23, this pump is built to support consistent fuel delivery in carbureted applications. This part cross-references Airtex Fuel Pumps 40373 for the same application.

Compatible With 1958-1960 Pontiac Bonneville, 1958-1960 Pontiac Catalina, 1961-1964 Pontiac Bonneville except High Lift Camshaft, 1961-1963 Pontiac Catalina except High Lift Camshaft, 1962 Pontiac Grand Prix, 1963 Pontiac Grand Prix except High Lift Camshaft, 1963 Pontiac LeMans except High Lift Camshaft, 1963 Pontiac Tempest except High Lift Camshaft, 1964-1965 Pontiac Catalina, 1964-1965 Pontiac Grand Prix except Super Duty, 1964-1965 Pontiac GTO, 1964-1965 Pontiac LeMans, and 1964-1965 Pontiac Tempest.

What It Helps Address

• Hard starting caused by weak fuel delivery
• Fuel starvation during normal engine operation
• Low or inconsistent fuel pressure at the carburetor
• Fuel system service on original Pontiac mechanical pump setups
• Replacement of a worn pump on classic Pontiac Catalina, Grand Prix, GTO, LeMans, Tempest, or Bonneville models

Installation Notes and Tips

Verify the vehicle’s original pump style, inlet routing, and outlet thread specification before installation. The gasket or seal is included; mounting hardware is not included. Check for application exceptions, including High Lift Camshaft and Super Duty notes listed in the fitment data, before ordering or installing the Carter M4566.

Quality Assurance

Carter Fuel Systems focuses on OE fit, form, and function with broad vehicle coverage and problem-solving design details. The M4566 follows that approach for classic Pontiac fuel system service and restoration work.