Delphi MF0086 Mechanical Fuel Pump

Delphi MF0086 Mechanical Fuel Pump

The Delphi MF0086 is a standard replacement mechanical fuel pump for gasoline applications that require threaded inlet and outlet connections, a 7 psi system pressure, and an average flow rating of 40. Built with Delphi OE heritage and application knowledge, it is a direct service part for select Buick models including Century, LeSabre, Regal, Riviera, and Skylark.

Key Features

• Mechanical fuel pump for gas fuel systems
• Threaded inlet and threaded outlet for secure connection
• Outlet fitting thread size: 5/8-18 UNF
• System pressure: 7 psi
• Average flow rating: 40
• Gasket or seal included
• Standard replacement grade
• Package contents: mechanical fuel pump, gasket, instruction sheet

Detailed Description

Delphi MF0086 is engineered as a mechanical fuel pump replacement for classic Buick applications that use a threaded fuel delivery setup. It is listed for 1967-1968 Buick Skylark, 1967-1968 Buick Riviera, 1970-1971 Buick Skylark, 1970-1974 Buick LeSabre, 1971-1974 Buick Riviera, 1973-1974 Buick Century, and 1973-1974 Buick Regal. This part number, MF0086, is built around Delphi’s OE-focused manufacturing background and is intended to restore proper fuel delivery in gasoline-powered vehicles that need a 7 psi mechanical pump with a 0.375-inch inlet outside diameter.

This part cross-references Airtex Fuel Pumps 40927 and Carter M4511 for the same application.

What It Helps Fix

• Hard starting caused by weak fuel delivery
• Fuel starvation during acceleration or cruising
• Low fuel pressure in carbureted systems
• Engine stalling related to inconsistent pump output
• Fuel supply issues on classic Buick Century, LeSabre, Regal, Riviera, and Skylark models

Installation Notes and Tips

Verify inlet and outlet thread sizes before installation, especially on vehicles that have been modified or previously repaired. Confirm the fuel line routing and gasket surface condition before mounting the pump. Use the included gasket during installation and follow the instruction sheet for proper alignment and torque practices. For fitment-specific searches, this part is commonly referenced as a mechanical fuel pump for 1970-1974 Buick LeSabre, 1971-1974 Buick Riviera, and 1973-1974 Buick Regal applications.

Quality Assurance

Delphi draws on more than a century of OE experience and a broad aftermarket portfolio to support replacement parts for a wide range of vehicles and model years. MF0086 is supplied as a standard replacement fuel pump with gasket and instruction sheet for service use.