Johnson Pump 28552 Motor Cartridge for 500 GPH Bilge Pumps, Black

The Johnson Pump 28552 Motor Cartridge is a complete replacement motor and impeller assembly designed to restore or upgrade a 500 GPH bilge pump in a matter of minutes. Rather than replacing the entire pump housing, this cartridge drops into the existing base so you can renew worn motor performance or clear out debris-fouled impellers without re-plumbing the discharge hose or re-wiring the mounting bracket. It is built in black plastic housing material and runs on 12 volt DC power, matching the standard voltage used in most recreational boat bilge circuits.

With a maximum flow rate of 8.33 gallons per minute, the 28552 cartridge is sized for 500 GPH-rated Johnson Pump bilge pump bases, making it a straightforward maintenance part for boat owners who want to keep bilge output at full rated capacity rather than let a worn motor or clogged impeller quietly reduce pumping performance. The self-contained cartridge design means the motor and impeller are serviced as a single unit, simplifying routine maintenance and reducing the chance of a mismatched motor and impeller pairing.

Specifications

• Brand: Johnson Pump
• Manufacturer Part Number: 28552
• Category: Bilge Pump Cartridge
• Style: Bilge
• Color: Black
• Material: Plastic
• Voltage: 12 Volts
• Maximum Flow Rate: 8.33 Gallons Per Minute
• Product Dimensions: 6 inches L x 3 inches W x 7.5 inches H
• Weight: 1 pound
• UPC: 729321285520

Frequently Asked Questions

What is the Johnson Pump 28552 used for? The Johnson Pump 28552 is a motor cartridge that replaces the motor and impeller assembly inside a 500 GPH bilge pump, letting you restore pumping performance without replacing the entire pump housing.

What flow rate does the 28552 cartridge support? It supports a maximum flow rate of 8.33 gallons per minute, matching the rated output of a 500 GPH bilge pump base.

What voltage does this cartridge run on? The Johnson Pump 28552 operates on 12 volts DC, the standard voltage for most recreational boat bilge pump circuits.

How much does the 28552 motor cartridge weigh? This cartridge weighs 1 pound.

What are the dimensions of the 28552 cartridge? The Johnson Pump 28552 measures 6 inches long by 3 inches wide by 7.5 inches high.

What material is the 28552 cartridge made of? It is constructed of black plastic housing material.

Is this a full pump replacement or just the motor? The 28552 is a cartridge containing the motor and impeller as a single serviceable unit, not a full pump housing, so it installs into an existing 500 GPH bilge pump base.

How difficult is it to install the 28552 cartridge? The cartridge is designed for a quick swap, allowing you to renew the motor and impeller in a matter of minutes without disconnecting the discharge hose or mounting bracket.

Why would I replace the cartridge instead of the whole bilge pump? If the base, mounting bracket, and plumbing are still in good condition, replacing just the Johnson Pump 28552 cartridge restores pump performance while avoiding the cost and labor of a full pump replacement.

What color is the 28552 cartridge? It is black.

Does the 28552 cartridge help with a clogged or debris-fouled bilge pump? Yes, the cartridge design makes it easy to clear out debris from the impeller by replacing the entire cartridge unit rather than disassembling individual components.