31503A1 Mercury-Mercruiser DIAFRAGM FUEL PUMP

The Mercury-Mercruiser 31503A1 is a genuine OEM diaphragm fuel pump designed for Mercury and Mercruiser marine engines. This fuel pump delivers consistent fuel pressure and flow to your engine’s carburetor or fuel injection system, ensuring reliable starting and smooth operation. A direct replacement for original equipment on compatible Mercury outboard and MerCruiser inboard engines.