YAMAHA SEAL 93101-25018

Function and technical context

The 93101-25018 seal is a critical sealing component on Yamaha engines that prevents water and contaminants from entering vital areas of the engine, particularly the cooling and transmission systems. This seal acts as a hermetic barrier to prevent leaks between the rotating shaft and the motor housing, guaranteeing the integrity of the internal circuits. Its deterioration or failure allows the penetration of seawater, accelerated corrosion of internal components and loss of lubrication efficiency, situations that can lead to irreversible damage to the engine if action is not taken quickly.

When to replace this part?

Symptoms of seal wear include visible water or oil drips around the installation area, water entering chambers that should be dry, and the presence of moisture in the engine crankcase. It is recommended to inspect the condition of the seal during each seasonal inspection and replace it preventively if it presents cracks, hardening of the elastomeric material or any sign of permanent compression. The preventive replacement of this component avoids unexpected breakdowns in navigation and costly repairs that lead to corrosion and oxidation of adjacent internal components.

Equivalent manufacturer part numbers