JPR-C3800 JMP Marine Cummins Pump | Marine Maintenance Upgrade

October 22, 2025

For anyone serious about marine maintenance and engine performance, the JPR-C3800 JMP Marine Cummins Replacement Engine Cooling Raw Water Pump is a must-have. Built to meet the highest standards of durability and precision, this heavy-duty pump ensures that your Cummins marine engine stays properly cooled, protected, and performing at its best — even under the toughest conditions.

Designed as a 100% plug-and-play replacement, the JPR-C3800 replaces Cummins pump part numbers 3049157, 3085649, and 3897669, and is fully compatible with K38, KT38M, KTA38M, and KTA50M engine models. Whether you’re doing a full engine overhaul, a cooling system upgrade, or routine preventive marine maintenance, this pump is engineered to fit seamlessly and deliver long-lasting reliability.

Built for Professional Marine Maintenance and Performance

Weighing approximately 90 lbs (40.9 kg), the JPR-C3800 is designed for large-scale marine applications where strength and endurance are essential. The pump features a heavy-duty marine-grade casting that resists corrosion, a 3X series non-magnetic shaft for superior durability, and a high-performance bronze impeller (p/n IMP002603) that maintains strong water flow and stable engine temperatures.

With flange-type 2” ports and two included port C-clamps, installation is quick, secure, and efficient — saving valuable time during scheduled engine maintenance. Internally, the JPR-C3800 is compatible with genuine Cummins components, making it a reliable choice for both replacement and maintenance projects.

For easy servicing, JMP Marine offers a JSK0123 Major Service Kit (all internal parts) and a JMK0001 Seal Service Kit, both sold separately. These kits make regular marine maintenance simple and cost-effective, extending the life of your cooling system.

Important Compatibility Information

Cummins has released multiple water pump designs for KTA50 engines, so verifying your genuine part number is key before replacement. The JPR-C3800 fits the older dual-pump 38-liter models, while newer single-pump setups use Jabsco or Gilkes designs.

If your system uses a Jabsco Vortex Pump, JMP Marine offers compatible service kits:

• JSK0118 Replacement Impeller Kit – includes bronze impeller and wear ring.
   

• JSK0117 Major Service Kit – includes all internal parts except impeller and wear ring.
   

Please note that JMP currently does not offer a replacement for the Gilkes-style pumps used on certain KTA30 and KTA50 engines.

The Marine Maintenance Advantage with JMP Marine

Proper marine maintenance means using components that last. The JPR-C3800 is engineered with high-grade materials and precision design to minimize downtime and maximize engine longevity. From commercial vessels to industrial marine fleets, JMP Marine pumps are trusted worldwide for their durability, high-volume flow, and easy serviceability.

As JMP Marine proudly says:
“THE ONLY ONE.”

When your marine maintenance schedule calls for reliability and performance, trust the JPR-C3800 JMP Marine Cummins Replacement Engine Cooling Raw Water Pump — the professional choice for powerful cooling and peace of mind at sea.