YAMAHA O-RING 61N-11515-00 REC61N-11515-00

Function and technical context

The O-ring is a toroidal geometry sealing gasket that seals critical connections in the cooling and pressure circuits of Yamaha engines. This component works in systems where absolute tightness between surfaces is required, preventing leaks of coolant, oil or seawater depending on its specific location in the engine. Its failure or deterioration can cause losses of cooling fluid, unwanted entry of salt water into internal circuits, or a reduction in lubrication pressure, events that significantly accelerate the wear of internal components and can compromise the operation of the propulsion in navigation.

When to replace this part?

O-rings experience hardening and loss of elasticity over time, especially after repeated thermal cycling and exposure to chemical fluids. It is advisable to visually inspect this gasket during each seasonal maintenance check and proceed with its preventive replacement if cracks, discolorations, permanent deformations are observed or if leaks are detected in the sealing area. Preventive replacement at the manufacturer's recommended inspection intervals avoids costly emergency repairs and the need for extensive engine interventions during the boating season.

Equivalent manufacturer part numbers