WATER PUMP REPAIR KIT 853792T01

Function and technical context

This repair kit is the complete set of replacement components for the water pump of marine cooling systems on Mercury and MerCruiser 2-cylinder engines. The water pump is the heart of the engine's cooling circuit, driving the flow of sea or fresh water through the engine block to extract the heat generated by combustion. When the internal components of the pump – especially the impeller and seals – wear due to erosion, cavitation or corrosion, the cooling flow rate decreases drastically, compromising the engine's ability to regulate its temperature and exposing the equipment to critical overheating during navigation.

When to replace this part?

The most obvious symptoms include water leaks around the pump shaft, abnormal noises (cavitation or metal rubbing) during operation, or a gradual increase in engine temperature despite sailing in cold waters. The impeller and seals should be checked after each season of intense use or after 300-400 hours of operation, especially in waters with a high content of sand, silt or algae that accelerate erosion. Preventive replacement of the repair kit during winter maintenance prevents unforeseen breakdowns at sea and prolongs the life of the pump assembly.

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers