Strengthen Your Marine Maintenance Routine with the JPR-G6400 JMP Marine Detroit Diesel Cooling Pump

November 26, 2025

Strengthen Your Marine Maintenance Routine with the JPR-G6400 JMP Marine Detroit Diesel Cooling Pump

When it comes to marine maintenance, few tasks are more important than keeping your engine’s cooling system functioning at peak efficiency. For vessels powered by Detroit Diesel 12V71TI, 12V92TA, 16V149TA, or Series 149 engines, the JPR-G6400 JMP Marine Raw Water Pump delivers the reliable, high-volume cooling performance needed to safeguard engine health in demanding marine conditions.

Whether you're performing routine marine maintenance or replacing an aging OEM pump, the JPR-G6400 offers a durable, plug-and-play solution. This pump replaces genuine Detroit Diesel part numbers 23525078 and 8927296, as well as Jabsco pump models 18780-0001 and 18780, giving technicians and vessel owners a trusted, direct-fit upgrade designed for long-term reliability.

Engineered for Marine Performance & Heavy-Duty Durability

Every component of the JPR-G6400 is built specifically for real-world marine maintenance needs:

• Heavy-duty marine grade casting provides exceptional corrosion resistance — essential for vessels operating in saltwater environments.

• The 3X Series non-magnetic marine-grade shaft offers enhanced strength, stability, and long-term wear resistance.

• A high-performance impeller (JMP 9000-01K) ensures powerful, consistent raw water flow to protect against overheating.

• The pump’s heavy-duty bronze cam liner withstands continuous use in high-output marine engines, reinforcing overall pump longevity.

Weighing 38 lbs (17.27 kg), the JPR-G6400 is built with the substantial, high-strength construction required for serious marine applications.

Designed for Preventive Marine Maintenance

Effective marine maintenance is all about preventing failure before it starts. The JPR-G6400 supports that proactive approach with easy access to internal components and full compatibility with service kits:

• Major Service Kit JSK0027 includes all internal parts (sold separately).

• Minor Service Kit JSM0004 supports small, routine repairs to keep your cooling system running at peak efficiency.

Since the JPR-G6400 is internally compatible with genuine Detroit Diesel pumps, integrating it into existing maintenance routines is seamless. Technicians appreciate the straightforward installation and dependable performance it brings to scheduled marine maintenance procedures.

Choosing the Correct Pump for Your Detroit Diesel Engine

Detroit Diesel V71 series engines use three pump versions — JPR-G6200, JPR-G6300, and JPR-G6400. Marine maintenance professionals can confirm compatibility by cross-referencing pump images and flow ratings. The G6400 delivers 125 GPM, providing the highest flow capacity of the three, making it ideal for larger engines and high-demand environments.

Dependable Cooling for Demanding Marine Applications

From commercial fleets to private sportfishing yachts, the JPR-G6400 ensures stable cooling performance in even the harshest marine environments. As part of JMP Marine’s industry-leading product line, this pump enhances marine maintenance routines by improving cooling reliability, engine protection, and overall operating efficiency.

JMP MARINE… “THE ONLY ONE.”