GMB 520-8020 Mechanical Fuel Pump

Mechanical Fuel Pump for Jeep Applications

The GMB 520-8020 mechanical fuel pump is built to meet or exceed OEM specifications for dependable fuel delivery in classic Jeep applications. It is an OEM standard replacement for Jeep CJ5, CJ7, Scrambler, Cherokee, J10, J20, and Wagoneer models across the listed years.

Use this GMB 520-8020 fuel pump when you need a direct mechanical replacement for a worn or failing pump on a Jeep CJ7 or Cherokee. The design follows OEM-standard requirements for fit and function in carbureted fuel systems.

Key Features

• Mechanical fuel pump for air and fuel delivery applications
• OEM standard item grade for factory-style replacement
• Manufactured to meet or exceed OEM specifications
• No gasket required
• Strainer not required

Detailed Product Overview

The GMB 520-8020 is a mechanical fuel pump engineered for classic Jeep fuel system service. It is intended for vehicles that use a mechanical pump mounted to the engine, including 1972-1983 Jeep CJ5, 1976-1986 Jeep CJ7, 1981-1985 Jeep Scrambler, 1974-1983 Jeep Cherokee, 1974-1980 Jeep J10, 1974 and 1976 Jeep J20, and 1971-1973 Jeep Wagoneer. This part cross-references Airtex Fuel Pumps 6737 and Carter M6737 for the same application.

For buyers searching for a Jeep CJ7 fuel pump replacement, Jeep Cherokee mechanical fuel pump, or GMB 520-8020 fuel pump for classic Jeep trucks and SUVs, this part provides an OEM-standard service solution with fitment coverage across multiple Jeep platforms.

What This Part Helps Address

• Hard starting caused by weak fuel delivery
• Engine stalling from inconsistent fuel pressure
• Fuel starvation under normal driving conditions
• Loss of pump output from a worn mechanical diaphragm
• Replacement needs on aging Jeep carbureted fuel systems

Installation Notes and Tips

Confirm engine-side mechanical pump fitment before ordering, since this part is listed for specific Jeep models and years only. Inspect the mounting surface and fuel lines during replacement, and verify that the existing application does not require a gasket or strainer with this pump configuration. Match the part number 520-8020 to your original pump or interchange reference before installation.

Quality Assurance

GMB states that this pump is manufactured to meet or exceed OEM specifications and built to OEM standard requirements. The part number 520-8020 is supported by multiple interchange references, including 5208020, which helps confirm application matching for classic Jeep fuel system service.