BOARD 688-44315-A0 REC688-44315-00

Function and technical context

This gasket plays a fundamental role in Yamaha engine sealing systems, sealing critical connections between components to prevent leaks of operating fluids. By maintaining the structural integrity of the joints, it prevents the ingress of salt water and the loss of coolant or lubricant to the marine environment. Its deterioration compromises the tightness of the engine, and can generate infiltrations that accelerate internal corrosion and overheating of the propellant.

When to replace this part?

The joints show hardening and loss of elasticity after several years of exposure to fluctuating temperatures and salt cycles, generating small leaks that are difficult to detect initially. It is recommended to inspect the condition of the gaskets during each seasonal inspection and replace them preventively every 5-7 years or when a change in color, superficial cracks or permanent compression is observed. Preventatively replacing the gasket before it fails prevents emergency water repairs and possible secondary damage to internal areas of the engine.

Equivalent manufacturer part numbers