CIGúEÑAL PART 4 ​​827144M

Function and technical context

The crankshaft is the fundamental component of the engine that transforms the reciprocating linear movement of the pistons into continuous rotational movement, transmitting the power generated in combustion to the transmission and propeller. This part 4 constitutes a critical section of the drive shaft, responsible for maintaining geometric alignment and dynamic balance under the demanding conditions of marine operation, where vibrations and cyclic loads are especially severe. The correct operation of the crankshaft is essential to guarantee combustion efficiency, rotational stability and mechanical integrity of the powertrain in recreational and professional boats.

When to replace this part?

Crankshaft wear is manifested by abnormal vibrations in the engine, metallic noises at low revolutions, progressive loss of power, or internal knocking that intensifies under load. Although there is no predetermined replacement interval as with filters or impellers, inspection of the crankshaft is recommended after each marine campaign or at intervals of 500-1000 hours of operation, especially if the engine has worked with low quality fuel or with deficiencies in lubrication. Preventive replacement of this part prevents secondary damage to bearings, pistons and cylinders, significantly reducing the total repair cost in the event of a breakdown.

Engine Compatibility

Mercury/MerCruiser

Equivalent manufacturer part numbers