YAMAHA O-RING 93101-22M15 REC93210-74M35

Function and technical context

The O-ring is a cylindrical sealing gasket that acts as a hermetic seal in the cooling systems and water circuits of Yamaha engines. This piece works at critical points where rotating or pressurized components are attached, preventing coolant fluid leaks to the outside or the entry of seawater into internal cavities of the engine. Its correct operation is essential to maintain the integrity of the cooling system, prevent internal corrosion and ensure that the engine operates at optimal operating temperature without loss of performance.

When to replace this part?

O-rings require replacement when they show cracks, hardening, permanent crushing or loss of elasticity, symptoms that manifest themselves with visible leaks in the gaskets, overheating of the engine or entry of water into cavities that should be dry. It is recommended to review and inspect these gaskets during each seasonal maintenance and replace them preventively after interventions that involve dismantling components of the cooling circuit, thus avoiding costly breakdowns in navigation. Early replacement is especially important on vessels operating in salt water, where corrosion accelerates seal deterioration.

Equivalent manufacturer part numbers