Sierra 18-7271 Mechanical Fuel Pump for Crusader GM 7.4L 454 Big Block Marine Engines

The Sierra 18-7271 is a mechanical fuel pump engineered as a direct replacement for early Crusader Big Block V8 marine engines based on the GM 7.4-liter (454 cu. in.) platform. Designed to meet or exceed OEM specifications, this pump delivers reliable fuel pressure of 6–8 PSI to keep your inboard marine engine running at peak performance.

Key Features:

• Direct replacement for early model Crusader GM Big Block 7.4L / 454 cu. in. marine engines
• Fuel inlet at 3 o'clock position; outlet at 9 o'clock position (viewed from bottom with rocker arm at 12 o'clock)
• Dual-diaphragm design for dependable marine-duty fuel delivery
• Delivers 6–8 PSI fuel pressure meeting OEM specifications
• Does not include provision for vent tube to carburetor
• Includes mounting gasket for straightforward installation
• Built to withstand the demanding marine environment

OEM Cross-Reference Numbers:

• Crusader: 21141
• Carter: M73024
• Holley: 716-41418
• Mallory: 9-35415
• Flange ID: 41418

Sierra marine parts are engineered to restore your engine's fuel system to original performance standards, providing long-lasting reliability you can count on out on the water.