O-RING 93210-53679 REC93210-53M08

Function and technical context

The 93210-53679 O-ring is a sealing gasket that is part of the sealing systems in Yamaha engines for marine applications. This part works under variable pressure and temperature conditions, being responsible for preventing leaks of coolant, fuel or other fluids at critical points of the engine. Its function is essential to maintain the integrity of the cooling and power circuits, preventing the loss of system pressure and the entry of salt water into areas that could compromise the operation of the engine. Failure or wear of this gasket can lead to leaks, engine overheating, accelerated corrosion of internal components and loss of performance.

When to replace this part?

O-rings degrade due to prolonged exposure to temperature changes, engine vibrations and contact with chemical agents present in the coolant and salt water. It is recommended to check and replace preventively during annual seasonal maintenance checks, especially after long sailing campaigns or if small leaks are detected around pipe connections, water pump or other sealing points. Preventively changing the gasket during scheduled maintenance avoids costly emergency repairs at sea and protects the engine from secondary failures resulting from leaks.

Equivalent manufacturer part numbers