This assembly serves as an essential component in marine propulsion systems, specifically designed for Yamaha outboard motors. It typically includes a splined hub, thrust washers, and spacers, facilitating the connection between the propeller and the engine’s drive shaft. This allows for efficient transfer of power from the engine to the propeller, enabling boat movement. For example, if a vessel experiences propeller slippage or vibration, inspection and potential replacement of this assembly is a necessary diagnostic step.
The correct functioning of this mechanism contributes significantly to the overall performance and longevity of an outboard motor. It provides a degree of cushioning, reducing the impact of shifting gears and encountering underwater obstacles. This reduces stress on the engine’s lower unit, potentially preventing costly repairs. Originally, direct coupling methods were common; however, modern designs utilizing this type of flexible coupling have demonstrably improved engine protection and vibration dampening.
