Raw Water Pump Refurbishment
Marine Cooling Systems

Raw Water Pump Refurbishment

Raw water pumps are a critical part of the marine engine cooling circuit. We carry out full strip-down, inspection, and overhaul of raw water pumps — replacing impellers, seals, bearings, and wear plates as required. All units are inspected for corrosion and erosion damage before reassembly and return to service.

A worn or damaged raw water pump impeller is one of the most common causes of engine overheating on marine vessels. Impeller failure can occur suddenly, leaving the engine without cooling water and causing rapid overheating. Regular inspection and replacement of the impeller is essential preventative maintenance.

We work on raw water pumps from a wide range of marine engine manufacturers. All units are fully stripped, inspected, and reassembled with new seals and wear components before return to service.

Frequently Asked Questions

How often should a raw water pump impeller be replaced?

Most engine manufacturers recommend inspecting the impeller annually or every 200–300 hours of operation. Impeller failure can occur suddenly and without warning, so regular inspection is essential preventative maintenance.

What are the signs of a failing raw water pump?

Engine overheating, reduced raw water flow, or visible impeller debris in the cooling circuit are common signs. If you suspect a problem, the pump should be inspected immediately to avoid engine damage.

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