Johnson Pump Heavy Duty Bilge Pump 4000 GPH - 24V - 40084

The Johnson Pump Heavy Duty Bilge Pump 4000 GPH – 24 V (Model 40084) is a powerful, rugged submersible bilge pump designed to move high volumes of water quickly and reliably in demanding marine environments. Built with a liquid‑cooled, 12‑pole motor with double ball bearings, this heavy‑duty pump delivers robust performance with extended service life and smooth operation. Its sturdy ABS thermoplastic housing, stainless‑steel shaft, and mechanical shaft seal ensure durable corrosion resistance and long‑term reliability, even in saltwater conditions. 

Featuring a universal base plate and a choice of 1½″ or 2″ threaded discharge ports, installation is flexible and straightforward. The pump includes a removable check valve to prevent backflow and can be teamed with electronic float switches or an Ultima automatic switch for hands‑off operation. Whether used as a primary bilge pump or a backup safety unit, this 4000 GPH model provides dependable dewatering power for larger boats, commercial craft, and offshore applications. 

Technical Specifications

Performance

• Flow Rate: Up to 4000 GPH (~252 L/min) at 24 V — high‑capacity pumping for rapid bilge water removal. 

• Head (1.0 m): ~2600 GPH (~164 L/min) — maintains strong performance at modest lift. 

Electrical

• Voltage: 24 V DC — compatible with standard marine 24 V battery systems. 

• Current Draw: 7.5 A — efficient power draw with heavy‑duty output. 

• Recommended Fuse: 15 A for safe operation. 

Construction

• Motor: Liquid‑cooled, 12‑pole motor with double ball bearings for extended life.

• Shaft: Stainless steel (SS2343) for corrosion resistance and strength. 

• Impeller: Carefully designed for optimized head and flow performance. 

• Housing: High‑impact ABS plastic — rugged and marine‑ready.

• Seal: Mechanical shaft seal on the 4000 GPH version for enhanced durability. 

Plumbing & Mounting

• Discharge Ports: 1‑½″ and 2″ threaded connections — flexible hose hookup options. 

• Base Plate: Universal mounting base for easy installation in various bilge configurations. 

• Check Valve: Removable check valve included to prevent water backflow. 

Warranty & Compatibility

• Warranty: Limited 1‑year warranty (varies by retailer/territory). 

• Automatic Operation: Can be paired with Johnson Pump electronic float switches or Ultima switches for automatic bilge control. 

Why Choose the Johnson Pump 4000 GPH Heavy Duty Bilge Pump?

The Johnson Pump 40084 delivers unmatched pumping power and durability for vessels that require fast, reliable bilge evacuation. Built for professionals and serious boaters alike, it provides peace of mind through dependable performance in the toughest marine conditions.

Installation Tip

For fully automatic operation, this pump should be paired with a high-capacity switch like the Johnson Ultima Switch or an electronic float switch. Also, ensure you use 14 AWG marine-grade wire for extensions to handle the current draw over long runs.

Manufacturer : Johnson Pump
Manufacturer Part No : 40084