Carter M4511 Mechanical Fuel Pump

Carter M4511 Mechanical Fuel Pump Overview

The Carter M4511 is a mechanical fuel pump built for OE-style fit, form, and function on select classic Buick applications. It features a tube inlet, a single threaded outlet, and a gasket or seal included for service replacement work.

Compatible With 1967-1974 Buick Riviera, 1967-1968 Buick Skylark, 1970-1971 Buick Skylark, 1970-1974 Buick LeSabre, 1973-1974 Buick Century, and 1973-1974 Buick Regal with a 3 line pump.

Key Features

• Mechanical fuel pump design for carbureted fuel delivery systems
• Tube inlet and threaded outlet for factory-style plumbing
• Single outlet with 5/8-18 UNF-2B outlet fitting thread size
• Minimum flow rating of 40 for steady fuel delivery
• Operating pressure range of 5.5 to 7 psi
• Gasket or seal included for replacement service
• OE fit, form, and function focus from Carter Fuel Systems

Detailed Description

Carter M4511 is a mechanical fuel pump for classic Buick models that require a 3 line pump configuration. It is built with a tube inlet, threaded outlet, and a pressure range of 5.5 to 7 psi, making it a direct replacement choice for restoring proper fuel delivery on carbureted engines. This part cross-references Airtex Fuel Pumps 40927 and Delphi MF0086 for the same application.

Use the Carter M4511 when servicing a Buick Century, Buick LeSabre, Buick Regal, Buick Riviera, or Buick Skylark that needs a mechanical pump with OE-style dimensions and connection points. The design supports consistent fuel flow and straightforward line connection at the outlet.

What It Helps Address

• Hard starting caused by weak fuel delivery
• Fuel starvation under normal driving conditions
• Low fuel pressure at the carburetor
• Fuel pump leakage at the mounting interface
• Restoration of original-style mechanical fuel system operation

Installation Notes and Tips

Verify the vehicle uses a 3 line pump before ordering. Confirm the outlet thread size, inlet style, and pressure requirements against the original pump and fuel line setup. Mounting hardware is not included. Replace the gasket or seal during installation and inspect fuel lines for wear, corrosion, or thread damage before final assembly.

Quality Assurance

Carter Fuel Systems positions this pump as an OE fit, form, and function replacement with broad vehicle coverage and problem-solving design features. The M4511 is built for direct service replacement on the listed Buick applications.