Carter M6878 Mechanical Fuel Pump

Carter M6878 Mechanical Fuel Pump

The Carter M6878 is a mechanical fuel pump built for OE-style fit, form, and function on select Ford, Lincoln, and Mercury applications. It is a practical replacement for classic carbureted vehicles that need steady fuel delivery and correct threaded outlet connection.

Key Features

• Mechanical fuel pump for air and fuel delivery systems
• Hose-style inlet with 9.5 mm outside diameter
• Threaded outlet with 1/2-20 UNF fitting
• Gasket or seal included for installation
• Operating pressure range: 5.5 to 7 psi
• Minimum flow rating: 23
• Two mounting holes for OE-style attachment
• Compatible with select Ford LTD, Mercury Marquis, and Lincoln Continental applications

Detailed Description

Built for carbureted fuel systems, the Carter M6878 mechanical fuel pump delivers the pressure and flow needed for older Ford, Lincoln, and Mercury vehicles. The pump uses one hose inlet and one threaded outlet, making it a direct-style service part for vehicles that rely on a mechanical cam-driven fuel supply. This part number is commonly referenced for classic Ford LTD, Mercury Marquis, Mercury Cougar, Mercury Montego, and Lincoln Continental applications, including select 1968-1978 model years.

Carter positions this fuel systems program around OE fit, form, and function, along with broad vehicle coverage and problem-solving design details. The M6878 is a solid choice when replacing a worn mechanical pump on a Ford F-100, Thunderbird, or Mercury Colony Park application that requires the specified outlet thread size and pressure range.

This part cross-references Airtex Fuel Pumps 6878 and Delphi MF0054 for the same application.

Common Replacement Reasons

• Hard starting caused by low fuel pressure
• Fuel starvation during acceleration or cruising
• Fuel leakage at the pump body or fittings
• Inconsistent delivery to the carburetor
• Loss of performance from a worn mechanical diaphragm

Installation Notes

Verify inlet and outlet style, outlet thread size, and mounting hole alignment before installation. The gasket or seal is included, but mounting hardware is not included. Confirm the vehicle uses a mechanical fuel pump and check for late-production or package-specific notes, such as Police Package or without Return Line applications, before ordering. Prime and inspect the fuel system after installation to confirm proper pressure and leak-free operation.

Quality Assurance

Carter fuel system components are engineered around OE-style fit and function, with application coverage aimed at classic vehicle service needs. The M6878 is built to meet the pressure and flow requirements listed for the application.