CRANKSHAFT 2 PART YAMAHA 61N-11422-00

Function and technical context

The crankshaft is the central component of the connecting rod-crank system that converts the linear motion of the pistons into continuous rotation of the engine. In Yamaha marine engines, this part works under extreme load conditions, supporting combustion forces and transferring the power generated to the transmission and propeller. A defective or worn crankshaft compromises engine alignment, reduces combustion efficiency and can generate vibrations that damage other components such as bearings, seals and the gearbox.

When to replace this part?

Crankshaft wear is manifested by abnormal vibrations while running, metallic noises inside the engine, progressive loss of power and increased fuel consumption. Although there is no universal replacement hour interval, any excessive play detected in maintenance inspections or visible damage to crankpins and bearings requires immediate replacement. Replacing this part preventively avoids catastrophic navigation failures and costly secondary engine and transmission repairs.

Equivalent manufacturer part numbers