Carter M6978 Mechanical Fuel Pump

Carter M6978 Mechanical Fuel Pump for Ford V8 Applications

The Carter M6978 mechanical fuel pump is built for direct replacement use on select Ford truck applications from 1978-1979. It combines OE fit, form, and function with vehicle coverage focused on the fuel delivery needs of classic Ford Bronco, F-150, F-250, and F-350 models.

Compatible With 1978-1979 Ford Bronco, 1978-1979 Ford F-150, 1978-1979 Ford F-250, and 1979 Ford F-350, this pump is a practical choice for restoring steady fuel delivery on carbureted systems. The Carter M6978 is also a direct cross-reference to Airtex 6978 for the same application.

Key Features

• Mechanical fuel pump for air and fuel delivery service
• OE-style fit, form, and function for select Ford truck applications
• Hose-style inlet with threaded outlet connection
• 1/2-20 UNF outlet fitting thread size
• Gasket or seal included
• Two mounting holes for installation alignment
• Minimum flow rating of 40
• Operating pressure range of 4.5 to 6.5

Detailed Description

The Carter M6978 is a mechanical fuel pump engineered for select 1978-1979 Ford Bronco, F-150, F-250, and 1979 Ford F-350 models. It uses a hose inlet and threaded outlet configuration, with a 9.5 inlet outside diameter and a 1/2-20 UNF outlet thread size for proper fuel line connection. Carter’s fuel system design focus emphasizes OE fit, form, and function, along with broad coverage for older vehicle applications where dependable mechanical fuel delivery is required.

This part number, M6978, is suited for restoration and maintenance work on classic Ford truck fuel systems where the original mechanical pump layout is retained. The Carter M6978 also cross-references Airtex 6978 for the same application.

What It Helps Solve

• Hard starting caused by weak fuel delivery
• Fuel starvation under normal engine operation
• Low fuel pressure in carbureted Ford truck systems
• Fuel pump replacement on aging mechanical fuel systems
• Restoration of original-style fuel line routing and pump mounting

Installation Notes and Tips

Verify inlet and outlet orientation before installation, and confirm the 1/2-20 UNF outlet connection matches the vehicle’s fuel line setup. The gasket or seal is included; mounting hardware is not included. Check mounting hole alignment and inspect fuel lines, filters, and tank pickup components before installing the new pump. For best results, prime the fuel system and confirm pressure within the 4.5 to 6.5 range after installation.

Quality Assurance

Carter Fuel Systems positions this pump within its OE-fit replacement program, with attention to vehicle coverage and problem-solving fuel system design. Part number M6978 is built for direct replacement use on the listed Ford applications and is supported by Carter’s established fuel system engineering approach.