Cummins KTA 50 Marine Water Pump - Aftermarket

Marine Water Pumps for Cummins KTA50 Engines

The Cummins KTA50 is a powerhouse of industrial and marine performance, trusted worldwide for high-output applications such as offshore vessels, dredgers, commercial cargo ships, and power generation. To maintain safe operating temperatures and avoid catastrophic engine damage, one of the most critical components in any KTA50 marine application is the raw water pump—also known as the marine water pump or sea water pump.

Raw water pumps for the KTA50 are responsible for drawing seawater from outside the vessel and circulating it through the heat exchanger, aftercooler, and oil cooler to dissipate heat. Without this constant cooling loop, even a robust engine like the KTA50 would quickly overheat.

Bronze Flanged Marine Water Pump for KTA50

Our top-tier flanged bronze marine water pump is designed specifically for Cummins K and KTA Series marine engines, including the KTA50. The bronze body offers unmatched corrosion resistance against saltwater, while the high-efficiency impeller ensures a consistent and reliable seawater draw.

Key Features:

Durable bronze construction for extended lifespan in saltwater environments
Flanged inlet and outlet for secure installation in marine applications
Precision-machined impeller optimized for high-volume flow
Direct-fit replacement for Cummins marine configurations

This pump is engineered to meet or exceed OEM cooling performance and is suitable for both commercial and industrial marine settings. Whether you're running continuous-duty operations or cyclical marine workloads, it delivers dependable cooling flow when your engine needs it most.

Raw Water Pump for Cummins KTA38 and KTA50 Series

Another highly effective option is our marine water pump compatible with both KTA38 and KTA50 series engines. This pump features a 2” flanged port design and robust cast construction for superior durability in harsh marine conditions.

Marine Performance Advantages:

Compatible with multiple KTA models including KTA38 and KTA50
Heavy-duty design for offshore and commercial marine use
Reliable sealing components to minimize leakage and maintenance intervals

This pump configuration is ideal for refits or full cooling system rebuilds where reliability and raw water flow are mission-critical.

Impeller Maintenance & Accessories for KTA50 Water Pumps

Proper impeller function is vital for raw water pump efficiency. Over time, the impeller's flexible vanes can wear down, leading to reduced seawater flow and increased risk of overheating. That’s why we recommend regular inspections and using a dedicated impeller puller for safe and easy removal.

Impeller Puller for Marine Water Pumps

Designed for Cummins marine pump configurations, our impeller puller:

Reduces risk of damage during removal
Makes impeller servicing faster and safer
Works with KTA50 and other large-frame Cummins marine water pumps

Marine Thermostats & Seals for Optimal Engine Temperature

The thermostat plays a key role in regulating coolant flow within the KTA50 engine. Our 180°F non-vented marine thermostat ensures the engine warms up quickly and maintains optimal running temperatures without overheating.

Thermostat Features:

Marine-grade non-vented design
Suitable for KTA50 and compatible Cummins platforms
Designed for quick replacement during routine maintenance

Complementing the thermostat is our high-quality thermostat seal, which ensures a leak-free fit even under fluctuating pressure and temperature conditions.

Zinc Anodes for Marine Heat Exchangers & Coolers

Zinc anodes are essential sacrificial components that protect key cooling system elements from galvanic corrosion. Our selection includes:

Zinc for Heat Exchangers and Aftercoolers

Fits Cummins marine heat exchangers
NPT 1/2" thread, 2" zinc length
Ideal for routine replacement during pump or cooler servicing

Zinc for Oil and Fuel Coolers

NPT 3/8” thread, 1” zinc length
Designed to extend the life of sensitive cooler components
Must-have for KTA50 marine engine cooling systems

These zincs should be inspected and replaced at regular intervals to maintain corrosion protection throughout the raw water and closed-loop cooling systems.

Intake Water Strainers for KTA50 Marine Cooling Systems

Before raw seawater even reaches the pump, it must be filtered to remove debris that could damage internal cooling components. Intake water strainers act as the first line of defense.

Available Strainer Configurations:

1” Pipe Size: 9.5" H × 5.5" W
1.5” Pipe Size: 11.5" H × 7.25" W
2” Pipe Size: 16" H × 7.5" W
2.5” Pipe Size: 16" H × 7.5" W

Each marine strainer is built for high flow and corrosion resistance. These are essential for protecting KTA50 marine raw water pumps from clogging and premature wear. Properly installed strainers reduce downtime and extend pump service intervals.

Silicone Coolant Hoses for Marine Heat Exchange Systems

While the raw water pump handles seawater, the closed-loop side of the KTA50 engine requires durable silicone coolant hoses to move antifreeze through the heat exchanger and engine block.

Available Sizes (All 1-foot lengths):

1” to 4” inside diameter
Reinforced for high heat and vibration resistance
Flexible and marine-rated

These hoses are ideal replacements for aged or cracked lines, ensuring leak-free coolant flow during high-output marine operation. Always verify ID and length before ordering for optimal fitment.

Hose Clamps for Raw Water & Coolant Connections

To secure all marine hoses and seawater lines, we offer a full selection of stainless steel marine-grade hose clampscompatible with the KTA50’s raw water pump and coolant systems.

Clamp Diameter Ranges:

Stainless construction prevents corrosion, while smooth band design protects hoses from damage. These are essential for preventing leaks in both seawater and closed-loop coolant lines.

Why Diesel Pro Power?

With over 40,000 satisfied customers worldwide, Diesel Pro Power is a leading source for Cummins KTA50 marine engine parts. Whether you're replacing a seawater pump or rebuilding your entire cooling system, we stock the essential components you need—ready to ship fast.

Our marine-focused inventory ensures:

Corrosion-resistant, marine-grade materials
OEM-level compatibility and reliability
Fast order fulfillment and global shipping

We understand the urgency of marine downtime. That's why we carry the highest quality KTA50 marine water pumps, impellers, seals, thermostats, zincs, and more—so you can get back on the water with confidence.