IMPELLER 68T-44352-00 REC68T-44352-00

Function and technical context

The 68T-44352-00 impeller is the rotating water pump component responsible for pushing coolant through the marine engine's cooling circuit. It works within the water cooling system, sucking water from the external intake and distributing it through the internal galleries of the engine block, ensuring that the heat generated in combustion is dissipated in a controlled manner. Its correct operation is critical to maintain operating temperatures within safe limits; A worn or damaged impeller drastically reduces cooling flow, causing progressive engine overheating and accelerated deterioration of seals, cylinders and vital internal components.

When to replace this part?

Regularly inspect the impeller, especially in saltwater operations where corrosion and scale deposits accelerate impeller wear. The most obvious indicators of failure are the visible reduction in the water flow at the engine outlet, persistent overheating even at moderate speeds, and abnormal noises coming from the water pump. It is recommended to replace the impeller every 300-400 hours of operation or at least once per intensive sailing season, as well as preventively whenever major engine maintenance is performed or after prolonged periods of inactivity. A preventive replacement avoids running out of cooling capacity at sea and the costly emergency repairs that this would entail.

Compatibility with Yamaha engines

Equivalent manufacturer part numbers