O-RING 93210-74775 REC93210-74MG5

Function and technical context

This O-ring is part of the sealing systems in Yamaha engines, sealing critical joints in cooling, lubrication or fuel supply circuits. Its mission is to prevent fluid leaks and the entry of salt water at connection points subjected to continuous vibration and temperature changes. Failure or wear of this joint compromises the integrity of the affected circuit, generating fluid losses, moisture entry into internal systems and accelerated degradation of adjacent components.

When to replace this part?

O-rings lose elasticity due to exposure to salinity, temperature and compression cycles, presenting symptoms such as dripping in flanges, loss of pressure in cooling circuits or changes in oil viscosity due to contamination. It is recommended to check the condition of all gaskets during each seasonal maintenance and replace them preventively every 5-7 years or if there are any signs of hardening, discoloration or cracks. Changing this gasket preventively avoids unforeseen repairs in navigation and protects sensitive engine systems.

Equivalent manufacturer part numbers