Northern Lights Marine Water Pump Catalog

Northern Lights is one of the most trusted names in marine power generation, with reliable diesel engines powering vessels of all types around the globe. At the heart of every Northern Lights marine engine is a cooling system that depends on a properly functioning raw water pump. This pump pulls seawater into the system to keep the engine and generator running at safe operating temperatures, even under heavy loads and long duty cycles.

Diesel Pro Power proudly supplies marine water pumps and related components for Northern Lights engines across all major kilowatt ranges. With global shipping to more than 180 countries and a reputation built on serving 40,000+ satisfied customers, we make it easy to find exactly the pump you need, when you need it.

Select Northern Lights Engine to Find Your Marine Water Pump

When selecting a replacement raw water pump, the most important factor is matching the pump to your generator set’s size and kilowatt rating. Below are the main Northern Lights categories, each with specific water pump options designed for durability, corrosion resistance, and precise fit.

Northern Lights 6 kW and Under Marine Water Pumps

Engines in this range are compact and designed for smaller vessels or auxiliary power applications. Pumps for these engines are:

• Compact and lightweight, ensuring they fit into tight engine compartments.

• Efficient at low flow rates, designed to handle the reduced cooling needs of smaller engines without sacrificing reliability.

• Made with corrosion-resistant housings, often bronze or stainless, to withstand continuous seawater exposure.

• Easy to service, with impellers, seals, and bearings available for quick maintenance.

Applications include sailboats, small yachts, and auxiliary power units where consistent cooling is vital for dependable operation.

Northern Lights 8 – 20 kW Marine Water Pumps

Engines rated from 8 to 20 kW are among the most common in Northern Lights’ lineup, offering a balance of compact design and higher electrical output. The water pumps in this category are engineered to:

• Deliver increased seawater flow to accommodate higher kilowatt ratings.

• Provide long service intervals, reducing downtime for vessels that operate daily.

• Support both recreational and commercial vessels, from mid-size cruisers to fishing boats.

• Work seamlessly with standard impellers and rebuild kits available through Diesel Pro Power.

For operators in this kilowatt range, upgrading or replacing a raw water pump ensures optimal performance in warm climates, where seawater cooling demands can be more intensive.

Northern Lights 20 – 32 kW Marine Water Pumps

Engines producing between 20 and 32 kW require a more robust water pump, capable of handling larger volumes of seawater under constant load. Features of these pumps include:

• Heavy-duty bearings and shafts built to withstand higher RPM and extended operating hours.

• Precision-engineered seals that minimize the risk of leaks in demanding marine environments.

• Compatibility with commercial fishing vessels, charter fleets, and workboats that demand continuous uptime.

• Availability of complete rebuild kits for cost-effective maintenance and long-term reliability.

These pumps are designed with serviceability in mind, allowing operators to replace impellers and seals onboard without specialized tools.

Northern Lights 28 – 40 kW Marine Water Pumps

At the higher end of the generator range, Northern Lights engines between 28 and 40 kW require rugged water pumps capable of sustaining high output under extreme conditions. Pumps in this class are:

• Built for continuous-duty marine environments, such as offshore vessels, large yachts, and commercial ships.

• Designed with high-capacity impellers to move significant seawater volume for efficient cooling.

• Constructed using marine-grade bronze housings for long-lasting resistance to saltwater corrosion.

• Supported by readily available replacement parts, including impellers, gaskets, seals, and pulleys.

For vessels that rely on these larger gensets for critical onboard systems, having a dependable raw water pump is essential to preventing overheating and ensuring uninterrupted power generation.

Why Diesel Pro Power for Northern Lights Marine Water Pumps?

• Fast Global Shipping: Orders ship within 24 hours to over 180 countries.

• Proven Reliability: Trusted by over 40,000 marine operators worldwide.

• Comprehensive Coverage: Pumps, impellers, gaskets, rebuild kits, and related accessories in one place.

• Marine-Specific Focus: Unlike general suppliers, Diesel Pro specializes in continuous-duty marine engines.

• Expert Support: Our team ensures compatibility with your specific Northern Lights engine model and kilowatt rating.

Maintenance Tips for Northern Lights Raw Water Pumps

• Inspect impellers regularly: Replace at the first signs of wear, cracking, or loss of flexibility.

• Check seals and bearings: Prevent leaks by servicing these components before failure occurs.

• Flush the cooling system: If operating in silty or debris-heavy water, flushing helps prevent premature wear.

• Use genuine marine-grade parts: Ensures proper fit and long service life in seawater applications.