CIGúEÑAL PART 2 YAMAHA 63V-11422-00

Function and technical context

The crankshaft is the central component of the power transmission system in Yamaha engines, responsible for converting the reciprocating movement of the pistons into continuous rotation of the drive shaft. This part works under extreme mechanical stress, supporting compression and torsion forces during each combustion cycle. A worn or damaged crankshaft compromises the rotational stability of the engine, directly affecting available power, fuel consumption and engine vibration. Its correct operation is essential to maintain the reliability and performance of the boat in navigation.

When to replace this part?

Symptoms of crankshaft wear include abnormal engine vibrations, progressive loss of power, increased fuel consumption and metallic noises coming from inside the engine block. Although there is no standard preventive maintenance interval for the crankshaft, a thorough check of the condition of the journals and balancing should be carried out during any major engine intervention or upon detection of the symptoms described. Preventive replacement of this part in the event of signs of fatigue prevents catastrophic breakdowns at sea and significantly prolongs the life of the marine engine.

Equivalent manufacturer part numbers