DRIVER 689-44352-02 REC689-44352-02

Function and technical context

The 689-44352-02 impeller is the central component of the cooling pump in two-stroke marine engines, responsible for pushing seawater into the engine block to maintain optimal temperatures during navigation. Installed in the forced circulation cooling system, it acts as a suction and propulsion element for the cooling fluid through ducts and cooling chambers. Its correct operation is critical to avoid overheating that deteriorates gaskets, cylinders and displacement, compromising the structural integrity of the engine and reducing its operational useful life.

When to replace this part?

Rubber impellers show progressive wear due to friction, cavitation and exposure to salt water, manifested by insufficient cooling flows, abnormal increase in engine temperature or water leaks in the pump area. It is recommended to inspect the condition of the impeller during each seasonal maintenance and replace it preventively every 300 to 400 hours of navigation, or when deformation, cracks or loss of flexibility of the fins is detected. Timely preventive replacement prevents costly navigation breakdowns and ensures reliable operation of the cooling system at all times.

Mercury/MerCruiser

Equivalent manufacturer part numbers