Delphi MF0081 Mechanical Fuel Pump

Delphi MF0081 Mechanical Fuel Pump

The Delphi MF0081 is a standard replacement mechanical fuel pump for gasoline applications that require threaded inlet and outlet connections, a 0.375 in. inlet outside diameter, and 8 psi system pressure. Built from Delphi’s OE-focused fuel system experience, it is a direct-fit option for select Buick, Pontiac, and Oldsmobile models with air conditioning and a 3-line pump setup.

Key Features

• Mechanical fuel pump for gas engines
• Threaded inlet and threaded outlet for secure fuel line connection
• 5/8-18 UNF outlet fitting thread size
• 0.375 in. inlet outside diameter
• 8 psi system pressure and 40 average flow rating
• Standard replacement grade for service repairs
• Gasket or seal included
• Package contents include the mechanical fuel pump, gasket, and instruction sheet

Detailed Description

Delphi MF0081 is engineered as a mechanical fuel pump replacement for classic GM applications that call for a short housing design and a 3-line pump configuration. It is listed for 1975-1981 Pontiac Firebird, 1975-1981 Pontiac LeMans, 1975-1981 Pontiac Grand Am, 1976-1981 Pontiac Bonneville, 1976-1981 Pontiac Catalina, 1976-1981 Pontiac Grand Prix, 1977-1980 Buick LeSabre, 1979-1981 Buick Century, 1979-1981 Buick Regal, 1979-1981 Pontiac Grand LeMans, 1979-1981 Pontiac Grand Prix, 1979-1981 Pontiac LeMans, and 1979 Oldsmobile Delta 88. This part cross-references Airtex Fuel Pumps 41201 for the same application. Delphi MF0081 also cross-references Spectra Premium SP1134MP for select applications.

Common Repair Uses

• Restores fuel delivery on a worn mechanical pump
• Addresses hard-start or no-start conditions caused by low fuel pressure
• Helps correct fuel starvation during acceleration or cruising
• Replaces a leaking pump body or failed diaphragm
• Supports proper fuel supply on carbureted gasoline engines

Installation Notes and Tips

Verify the vehicle uses the correct short housing, 3-line pump configuration, and threaded fuel connections before installation. Confirm the outlet thread size is 5/8-18 UNF and match the inlet outside diameter to the existing fuel line setup. Use the included gasket during installation and follow the instruction sheet for mounting and priming procedures. For fitment verification, compare the application to the exact year, make, and model listed for Buick Century, Pontiac Firebird, and Pontiac Grand Prix configurations with air conditioning.

Quality Assurance

Delphi builds aftermarket fuel system parts from OE heritage and application knowledge developed through long-term supplier experience with major automakers. That background is reflected in the MF0081’s standard replacement design and vehicle-specific fitment coverage.