YAMAHA 697-W0001-02 GASKET KIT

Function and technical context

This gasket kit constitutes the set of seals and essential sealing elements for the Yamaha 55B outboard motor. The gaskets act as closing barriers at the critical joints of the engine block, combustion chamber and cooling circuits, guaranteeing the necessary tightness so that the fluids (fuel, cooling water, lubrication oil) remain in their respective circuits. The deterioration or hardening of these gaskets due to repeated thermal cycles, contact with fuels and oxidation allows internal and external leaks that compromise the tightness, leading to power losses, engine overheating and water entry into critical areas.

When to replace this part?

Gaskets progressively degrade during engine operation, especially on saltwater vessels where corrosion and mineral deposits accelerate their hardening. Symptoms of wear include oil or coolant leaks around the seals, water in the crankcase, repeated engine overheating, or a noticeable drop in revolutions under load. It is recommended to preventively replace this kit during any significant engine disassembly intervention or every 5-7 years of intensive use, even without obvious symptoms, to avoid major repairs and unexpected stops while sailing.

Yamaha Engine Compatibility

Equivalent manufacturer part numbers