Attwood Marine Sahara S750 Automatic Bilge Pump, 750 GPH, 12V, 3/4 in Outlet

Overview

The Attwood Marine 4507-7 is a 12V automatic bilge pump rated at 750 GPH at open flow, with a built-in automatic switch and a 3/4 inch discharge connection. It is the Sahara S750 format, which keeps the pump and switch in one housing and makes sense in bilge spaces where room is limited.

At 3.3 ft of head it moves 625 GPH, and at 6.7 ft it moves 450 GPH, so it gives a more realistic output picture once lift and hose run are part of the system. The motor shaft is 316 stainless steel, the impeller is high-impact glass-filled polyester, and the base can be released with one hand for cleaning.

Key features

• 12V automatic bilge pump with integrated switch and 750 GPH open-flow rating
• 3/4 inch hose connection with a 5A fuse specification
• 625 GPH at 3.3 ft head and 450 GPH at 6.7 ft head
• Maximum head up to 16 ft
• 316 stainless steel motor shaft and high-impact glass-filled polyester impeller
• Mercury-free test knob for checking pump operation at the unit
• Base removes with one hand for cleaning and service in tight bilge areas

Compatibility and fit

This model fits 12V boats set up for a 3/4 inch I.D. bilge hose and matching 3/4 inch thru-hull. It works well where an automatic pump is needed without adding a separate float switch footprint, which is useful in small bilge wells on runabouts, center consoles, trailer boats, and compact sailboats or cruisers.

Installation and setup

Mount the pump on a flat surface at the lowest part of the bilge, with the outlet pointing toward the transom and kept level. That layout helps the pump prime correctly and reduces the chance of an air lock in the discharge line.

The pump body is sealed and submersible, but the wire connections should stay out of the water and be sealed properly against moisture. For service access, leave enough room to remove the base and clean the strainer without pulling the full installation apart.

Use on board

This pump is for clearing standing bilge water. It is not a crash pump and should not be treated as protection against fast flooding from hull damage or heavy weather. It suits owners who want automatic bilge pumping in a compact space and want routine cleaning to stay straightforward.