Johnson Pump Low Boy Bilge Pump | 750 GPH - 12V (33703)

The Johnson Pump 33703 is a specialized, low-profile centrifugal bilge pump designed for boats with extremely shallow bilges or restricted mounting space. Standing only 2.25 inches high, the "Low Boy" allows for effective water removal in tight areas where a standard vertical bilge pump simply won't fit, such as under engines or cockpit floors.

Engineered for Tight Spaces

The 33703 solves the common problem of standing water in shallow-keel boats. By utilizing a horizontal motor orientation, this pump can be mounted in the lowest point of the bilge to ensure maximum water extraction. It features a removable cartridge design, allowing the motor and impeller to be serviced or replaced without having to disassemble the plumbing or remove the entire pump base.

Key Features:

• Low-Profile Design: Specifically engineered for shallow bilges with a total height of just 2.25" (57mm).

• Easy-to-Service Cartridge: The motor unit can be removed with a simple "twist and click" mechanism for easy cleaning or replacement.

• Durable Construction: Built with a high-impact ABS plastic body and a corrosion-resistant stainless steel shaft for long-term marine use.

• Efficient Performance: Delivers 750 GPH at zero head, providing reliable water removal for small to mid-sized vessels.

• Ignition Protected: Safe for installation in engine compartments of gasoline-powered boats (meets USCG and ISO 8846 standards).

• Flexible Installation: Includes both a 3/4" (19mm) straight discharge and a 90-degree elbow to accommodate various hose routing needs in cramped spaces.

Technical Specifications:

• Model Number: 33703

• Flow Rate (0ft Head): 750 GPH (47 L/min)

• Voltage: 12V DC

• Amperage: 3.0 Amps

• Fuse Size: 5 Amps

• Discharge Port: 3/4" (19mm)

• Dimensions: 5.75" L x 3.25" W x 2.25" H

• Weight: 1.0 lb

Why Choose the Johnson Low Boy?

The 33703 is the industry-standard solution for ski boats, wakeboard boats, and low-slung performance hulls. It ensures that even the smallest amount of water—which can cause odors or structural issues over time—is effectively pumped out of the lowest crevices of the hull.

Installation Note:

Because the Low Boy is often used in very tight spaces, ensure the intake strainer remains clear of debris like zip-tie clippings or fiberglass shards common in new boat bilges. This pump is non-automatic, so it must be paired with a float switch or a manual dash switch.Manufacturer : Johnson Pump
Manufacturer Part No : 33703