US Motor Works USMP11383 Mechanical Fuel Pump

Mechanical Fuel Pump for Classic Buick Applications

US Motor Works USMP11383 is a mechanical fuel pump built for reliable fuel delivery in classic Buick applications. It is engineered to meet or exceed OEM specifications and uses durable materials for consistent fuel flow under demanding operating conditions.

Compatible With Buick Riviera, Skylark, LeSabre, Century, and Roadmaster applications listed below. This part cross-references Airtex Fuel Pumps 40371 and Delphi MF0148 for the same application.

Key Features

• Mechanical fuel pump for carbureted fuel systems
• Built to meet or exceed OEM specifications
• Constructed from high-quality materials for durability
• Supports steady fuel delivery to the engine
• US Motor Works part number USMP11383

Detailed Description

US Motor Works USMP11383 is a direct-fit mechanical fuel pump for select Buick models from the late 1950s through the mid-1960s. It is designed for dependable fuel transfer in vehicles that rely on a mechanical pump rather than an electric unit. For owners searching for a mechanical fuel pump for 1957-1958 Buick Roadmaster, 1958 Buick Century, or 1959-1964 Buick LeSabre, this replacement supports proper fuel supply to the engine under normal operating conditions.

Use USMP11383 when replacing a worn fuel pump on classic Buick Riviera or Skylark applications and when restoring consistent fuel pressure and delivery in older carbureted systems. The part number USMP11383 is also useful for cross-reference matching during catalog lookup and service verification.

What It Helps Solve

• Hard starting caused by weak fuel delivery
• Engine hesitation from inconsistent fuel flow
• Fuel starvation in worn mechanical pump systems
• Loss of drivability from an aging pump diaphragm or internal wear
• Restoration needs for classic Buick fuel system service

Installation Notes and Tips

Verify the vehicle year, make, and model against the fitment list before installation. Confirm that the fuel system uses a mechanical pump and inspect fuel lines, gaskets, and mounting surfaces for wear or contamination during replacement. For fitment, this part fits 1963-1965 Buick Riviera, 1965 Buick Skylark, 1959-1964 Buick LeSabre, 1958 Buick Century, and 1957-1958 Buick Roadmaster.

Quality Assurance

US Motor Works states that this fuel pump is engineered to meet or exceed OEM specifications and built from high-quality materials for durability and reliable operation. Part number USMP11383 is intended for buyers who want an OE-style replacement for classic Buick fuel system service.