O-RING 93210-56M80 PAF15-06080003

Function and technical context

The 93210-56M80 O-ring is a sealing gasket that integrates the internal circuits of the Yamaha F15 engine, preventing coolant and lubricant leaks in areas of higher pressure and temperature. Its correct installation is essential in the cooling system and in the passageways of critical fluids, where it acts as a hermetic barrier between surfaces subjected to constant vibration and repetitive thermal cycles. The failure or degradation of this joint compromises the integrity of the closed circuit, generating fluid losses and the entry of seawater that quickly degrades the performance of the propellant.

When to replace this part?

The O-rings lose elasticity after years of exposure to temperature variations and permanent contact with coolants and engine oils, manifested by slow drips under the engine, an abnormal decrease in the coolant level or the presence of water in the crankcase. It is recommended to inspect its condition during each seasonal maintenance and replace it preventively every 5-7 years or when work is carried out that requires opening the cooling circuit, thus avoiding emergency repairs in the water that compromise navigability and increase repair costs exponentially.

Equivalent manufacturer part numbers