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MAN Marine Raw Water Pumps & Cooling System Components

A reliable raw water pump is one of the most important components in any MAN marine engine. Whether you are operating a commercial vessel, a yacht, or a workboat powered by a MAN diesel engine, the raw water pump ensures proper cooling and stable operation in demanding marine environments. Without effective seawater circulation, overheating can damage cylinders, reduce efficiency, and lead to costly downtime.

At Diesel Pro Power, we supply high-quality replacement raw water pumps and impellers for MAN marine engines, trusted by more than 40,000 satisfied customers across 180+ countries. Our catalog is designed to give you confidence in selecting the correct raw water pump for your specific MAN engine series, backed by fast shipping, expert support, and worldwide coverage.

The Importance of Raw Water Pumps in MAN Marine Engines

Every MAN marine engine relies on a raw water pump as part of its closed-loop cooling system. Unlike land-based diesel engines that rely on radiators, MAN marine engines are designed to use seawater for heat transfer. The raw water pump pulls seawater through the intake, circulates it through heat exchangers, coolers, and intercoolers, and then discharges it through the exhaust system.

Functions of a MAN Raw Water Pump

  • Engine Cooling – Transfers heat from the engine block and lubricating oil through heat exchangers.

  • Air Charge Cooling – Keeps turbocharged intake air cool for higher efficiency and reduced emissions.

  • Exhaust Cooling – Flushes seawater into the exhaust stream to reduce noise and temperature.

  • System Protection – Maintains proper pressure and prevents cavitation that could damage pump housings or impellers.

Why Replacement Becomes Necessary

Raw water pumps operate in harsh environments. They handle corrosive seawater, sand, and debris. Over time, impellers wear out, seals degrade, and housings corrode. Replacing your MAN raw water pump or impeller on time ensures continuous protection against overheating.

MAN Marine Engine Series Covered

Diesel Pro Power carries raw water pumps and impellers for a wide range of MAN marine engines. Each engine family has unique requirements, but the role of the raw water pump remains consistent: ensuring dependable cooling for safe operation.

MAN D2866 Marine Raw Water Pump

The MAN D2866 series is one of the most recognized inline six-cylinder marine engines, widely used in workboats, ferries, and smaller commercial vessels.

Pump Characteristics

  • Compact design tailored for inline configurations.

  • Robust impeller systems optimized for continuous operation.

  • Easy access for inspection and maintenance.

Common Applications

  • Coastal cargo vessels.

  • Harbor tugs.

  • Commercial fishing boats.

Our raw water pumps for the D2866 are engineered for longevity, delivering consistent seawater flow even in sediment-heavy or warm-water environments.

MAN D2876 Marine Raw Water Pump

The MAN D2876 series is a six-cylinder marine diesel often found in yachts, patrol boats, and fast ferries.

Pump Functions

  • Handles higher flow rates needed for high-performance marine engines.

  • Works seamlessly with charge air coolers to maintain power at full throttle.

Reliability Features

  • Precision-engineered impellers.

  • Seawater-resistant construction.

  • Reduced maintenance requirements for operators running long hours.

Operators trust Diesel Pro Power for D2876 raw water pumps because of our fast shipping and verified compatibility checks.

MAN V10 Marine Raw Water Pump

MAN’s V10 engines are compact yet powerful, widely used in mid-size yachts and patrol vessels.

Cooling Demands

  • High-performance turbocharging requires steady seawater flow.

  • Pumps must be carefully matched to prevent undercooling or overcooling.

Benefits of Diesel Pro Power Supply

  • Correct-fit pumps with proven performance.

  • Access to replacement impellers and seal kits.

  • Worldwide delivery with most items shipping within 24 hours.

MAN V12 Marine Raw Water Pump

The MAN V12 marine engine family powers many luxury yachts and performance craft. These engines demand maximum reliability, especially at sustained high speeds.

Raw Water Pump Features

  • Dual cooling circuits supported by high-capacity raw water pumps.

  • Rugged housings built to withstand vibration in high-output conditions.

  • Seals designed to handle the combination of heat and seawater exposure.

Applications

  • Luxury yachts.

  • High-speed ferries.

  • Offshore support vessels.

For MAN V12 engines, Diesel Pro Power supplies replacement pumps and impellers that keep cooling systems functioning at peak efficiency.

MAN D2840 Marine Raw Water Pump

The MAN D2840 is a ten-cylinder marine engine found in both commercial and recreational vessels.

  • Designed for medium-duty service.

  • Raw water pumps are critical to oil cooler performance.

  • Ensures stable operation during extended voyages.

Diesel Pro Power provides durable raw water pumps to extend the lifespan of D2840 marine engines.

MAN D2842 Marine Raw Water Pump

The MAN D2842 series, a twelve-cylinder powerhouse, is often seen in large yachts and heavy-duty workboats.

Pump Characteristics

  • Handles extreme heat loads from high horsepower output.

  • Designed to integrate with intercoolers, heat exchangers, and aftercoolers.

  • Built to tolerate high-volume seawater flow.

These pumps are available through Diesel Pro Power with full global shipping support, minimizing downtime for operators worldwide.

MAN D2868 Marine Raw Water Pump

The MAN D2868 V8 engine powers both commercial and leisure vessels.

  • High-strength raw water pump designs support extended high-load operation.

  • Compact profile suits tight engine room spaces.

  • Impellers are replaceable to simplify scheduled maintenance.

Diesel Pro Power ensures operators can source the correct D2868 raw water pump quickly and confidently.

MAN D3876 Marine Raw Water Pump

The MAN D3876 is a more recent marine diesel platform, designed for efficiency and reduced emissions.

Cooling Requirements

  • Modern emission controls place extra demands on the cooling circuit.

  • Raw water pumps are engineered for high efficiency and reduced energy draw.

Diesel Pro Power provides reliable replacement raw water pumps for D3876 engines, ensuring compliance and performance.

Replacement MAN Raw Water Pump Impellers

In addition to full pumps, we also carry replacement impellers for MAN raw water pumps.

  • Manufactured from durable, marine-grade materials.

  • Designed for quick installation with minimal downtime.

  • Prevent costly overheating incidents caused by worn or damaged impellers.

Routine replacement of impellers is the most cost-effective way to protect your MAN engine’s cooling system.

Why Choose Diesel Pro Power for MAN Marine Raw Water Pumps

Proven Customer Trust

With over 40,000 satisfied customers in 180+ countries, Diesel Pro Power is the most trusted online source for MAN raw water pumps and cooling components.

Global Shipping

We deliver worldwide, ensuring operators receive the right parts quickly—whether your vessel is docked in Miami, Rotterdam, or Singapore.

Fast Delivery

Most MAN raw water pumps and impellers ship within 24 hours, minimizing costly downtime.

Expert Technical Support

Our team verifies compatibility before shipment, ensuring you receive the exact pump or impeller for your specific MAN marine engine.

Complete Catalog Coverage

From inline six-cylinder engines like the D2866 to high-output V12 models, Diesel Pro Power provides raw water pumps and impellers for every MAN marine engine family.

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