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Caterpillar Marine Water PumpsCaterpillar Marine Water Pumps

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Caterpillar Marine Raw Water Pumps – Aftermarket Catalog

Diesel Pro Power is your trusted global source for aftermarket raw water pumps for Caterpillar marine engines. Whether you operate a compact auxiliary engine such as the Caterpillar 3054B, a legendary mid-range 3208, or a massive 3516 powering a commercial tug, the raw water pump is a critical component that keeps your engine safe and reliable at sea.

The raw water pump plays a unique role in Caterpillar marine cooling systems. Unlike the freshwater pump, which circulates coolant inside the engine block, the raw water pump pulls seawater directly into the heat exchanger. There, it removes excess heat from the closed-loop coolant before being discharged overboard. Without a properly functioning raw water pump, engines can overheat quickly, leading to downtime, costly repairs, or catastrophic damage.

At Diesel Pro Power, we provide Caterpillar raw water pumps engineered for marine duty, built with corrosion-resistant housings, stainless-steel shafts, and high-performance impellers. With over 40,000 satisfied customers worldwide, we’re proud to be the leading aftermarket supplier trusted by commercial fleets, shipyards, and independent vessel operators.

Raw Water Pumps for Caterpillar 3000 Series Marine Engines

Raw Water Pump for Caterpillar 3054 Marine Engine

The Caterpillar 3054 is a compact four-cylinder engine often used in auxiliary marine applications such as generator sets or small propulsion systems. Despite its size, it depends heavily on a reliable raw water pump to keep operating temperatures stable in enclosed compartments where air circulation is limited.

A replacement raw water pump ensures:

  • Steady seawater flow through the heat exchanger

  • Protection against saltwater corrosion with bronze and stainless components

  • Reduced risk of overheating during long generator duty cycles

Caterpillar 3054B Marine

The 3054B is an updated version used widely in workboats and support vessels. In these applications, the raw water pump must operate continuously, often under high load, making pump integrity critical.

Raw Water Pump for Caterpillar 3056 Marine Engine

The Caterpillar 3056 is a six-cylinder marine engine designed for reliable propulsion and auxiliary service. Its raw water pump is built to handle continuous seawater intake, keeping coolant temperatures balanced under varying conditions.

Key points for the 3056 raw water pump:

  • Delivers consistent seawater volume for prolonged operations

  • Designed for efficiency in saltwater environments

  • Critical for generator systems that must operate 24/7

Raw Water Pumps for Caterpillar 3100 Series Marine Engines

Raw Water Pump for Caterpillar 3116 Marine Engine

The Caterpillar 3116 is one of the most popular medium-duty marine engines, widely installed in commercial fishing boats, tugs, and recreational yachts. Its raw water pump ensures that seawater flows efficiently into the heat exchanger to manage heat during long voyages.

Benefits of replacing the 3116 raw water pump include:

  • Improved seawater circulation for turbocharged configurations

  • Corrosion-resistant construction for longevity in saltwater

  • Reliable performance under heavy propulsion loads

Raw Water Pump for Caterpillar 3126 Marine Engine

The Caterpillar 3126 is the successor to the 3116 and became a widely used marine propulsion engine in commercial vessels and luxury yachts.

  • 3126B: Enhanced version with updated cooling requirements. A dependable raw water pump is essential to handle the increased seawater demand.

  • 3126E: Electronic version producing higher horsepower output, requiring maximum pump efficiency to manage heat loads during high-speed marine operation.

The raw water pump for the 3126 ensures uninterrupted seawater supply, keeping cylinder heads, liners, and turbochargers within safe temperature ranges.

Raw Water Pumps for Caterpillar 3200 Series Marine Engines

Raw Water Pump for Caterpillar 3208 Marine Engine

The Caterpillar 3208 is one of the most legendary marine engines ever built. Known for its versatility and long production run, it powered vessels ranging from mid-sized fishing boats to yachts and ferries.

  • 3208 NA (Naturally Aspirated): Requires steady seawater flow through the heat exchanger to maintain stable engine temperature.

  • 3208T (Turbocharged): Generates additional heat; the raw water pump is critical for balancing the increased thermal load.

  • 3208TA (Turbocharged Aftercooled): High-output version producing the most demanding cooling requirements. Here, raw water pump performance is absolutely essential to avoid overheating.

Replacing the raw water pump on a Caterpillar 3208 ensures dependable cooling and extends the life of one of the most durable engines in the marine industry.

Raw Water Pumps for Caterpillar 3300 Series Marine Engines

Raw Water Pump for Caterpillar 3304 Marine Engine

The Caterpillar 3304 has served in marine generator and auxiliary power applications for decades. A dependable raw water pump ensures continuous seawater circulation, which is vital when engines run under heavy electrical load for long periods.

Raw Water Pump for Caterpillar 3306 Marine Engine

The 3306 is a versatile six-cylinder engine used extensively in marine propulsion and auxiliary roles.

  • 3306B: Updated version requiring increased seawater flow.

  • 3306C: Heavy-duty variant, where raw water pumps must deliver uninterrupted performance under extended full-load operation.

A reliable raw water pump for the 3306 ensures stable operating temperatures whether powering workboats, tugs, or marine generators.

Raw Water Pumps for Caterpillar 3400 Series Marine Engines

Raw Water Pump for Caterpillar 3406 Marine Engine

The 3406 is a proven workhorse in marine propulsion. It powers fishing fleets, trawlers, and commercial vessels worldwide.

  • 3406B: Used heavily in tugboats and offshore service; pump durability is crucial.

  • 3406C: Enhanced version with greater thermal demands.

  • 3406E: Electronic, high-output model requiring maximum seawater flow.

A replacement raw water pump ensures the 3406 operates at peak reliability under extreme marine conditions.

Raw Water Pump for Caterpillar 3408 Marine Engine

The Caterpillar 3408 is a V8 powerhouse found in larger marine propulsion systems. Its raw water pump is designed to move large volumes of seawater to keep the engine operating within safe temperature ranges.

  • 3408B: Updated model with improved cooling requirements.

  • 3408C: High-performance version for continuous marine propulsion; raw water pump efficiency is non-negotiable.

Raw Water Pump for Caterpillar 3412 Marine Engine

The Caterpillar 3412 is a twelve-cylinder engine powering ferries, offshore vessels, and large commercial craft.

  • 3412B: Heavy-duty variant requiring a durable seawater pump.

  • 3412C: Optimized for marine propulsion, demanding consistent seawater circulation.

  • 3412E: Electronic high-output version with extreme thermal demands.

Raw water pumps for the 3412 are engineered to handle large seawater volumes, ensuring safe operation for high-output propulsion.

Raw Water Pumps for Caterpillar 3500 Series Marine Engines

Raw Water Pump for Caterpillar 3508 Marine Engine

The Caterpillar 3508 is a V8 engine built for large-scale marine propulsion. Its raw water pump provides massive seawater circulation to support continuous operation in commercial environments.

  • 3508B: Enhanced version used in tugboats and ferries.

  • 3508C: Designed for extreme marine propulsion duty cycles.

Raw Water Pump for Caterpillar 3512 Marine Engine

The Caterpillar 3512 is a twelve-cylinder marine giant, used in offshore supply vessels, tugs, and ferries.

  • 3512B: Requires dependable raw water pumps for offshore service.

  • 3512C: Designed for maximum cooling performance in high-load propulsion.

  • 3512E: Advanced version demanding exceptional seawater circulation for reliability.

Raw Water Pump for Caterpillar 3516 Marine Engine

The Caterpillar 3516 is one of the largest and most powerful marine engines Caterpillar produces. Its raw water pump must move enormous volumes of seawater to maintain thermal stability.

  • 3516B: Used in heavy-duty commercial and offshore fleets.

  • 3516C: Optimized for continuous marine operation.

  • 3516E: Latest-generation model with the highest cooling requirements.

Raw Water Pumps for Caterpillar C Series Marine Engines

Raw Water Pump for Caterpillar C7 Marine Engine

The Caterpillar C7 is widely used in both commercial vessels and pleasure craft.

  • C7 ACERT: Turbocharged and aftercooled, requiring reliable raw water pumps to manage seawater flow.

Raw Water Pump for Caterpillar C9 Marine Engine

The Caterpillar C9 serves both propulsion and generator roles.

  • C9 ACERT: High-performance variant demanding consistent seawater supply through its raw water pump.

Raw Water Pump for Caterpillar C12 Marine Engine

The C12 marine engine powers ferries, yachts, and workboats.

  • C12 ACERT: Requires maximum seawater circulation for turbocharged aftercooled systems.

Raw Water Pump for Caterpillar C18 Marine Engine

The Caterpillar C18 is a high-horsepower marine propulsion engine.

  • C18 ACERT: Delivers massive output and relies on a heavy-duty raw water pump for thermal balance under load.

Raw Water Pump for Caterpillar C32 Marine Engine

The Caterpillar C32 is the flagship high-output marine engine in the C-series lineup.

  • C32 ACERT: Requires one of the most robust raw water pumps in the industry to manage the extreme cooling demands of high-performance propulsion systems.

Why Purchase a Raw Water Pump from Diesel Pro Power?

Choosing the right supplier for your Caterpillar raw water pump is critical. Diesel Pro Power is more than a distributor — we are your marine engine partner, with decades of experience supporting operators worldwide.

  • OEM-Grade Reliability: Every raw water pump is engineered to meet or exceed Caterpillar standards.

  • Comprehensive Marine Coverage: From compact 3054B models to massive C32 ACERT engines, we supply raw water pumps for the entire Caterpillar marine lineup.

  • Marine Expertise: We focus exclusively on marine and industrial diesel applications.

  • Global Shipping: Fast delivery anywhere in the world to minimize downtime.

  • Customer Trust: Over 40,000 operators worldwide rely on us for critical Caterpillar parts.

  • Dedicated Support: Our knowledgeable staff will help identify the right pump and provide installation guidance.

By choosing Diesel Pro Power, you’re not just buying a raw water pump. You’re investing in engine reliability, vessel uptime, and peace of mind at sea.

 

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