BOLT 41-11771T REC6F5-11633-00

Function and technical context

The 41-11771T piston pin is the mechanical connecting element that connects the piston to the connecting rod in Mercury, Mariner and Mercruiser engines. This part works in the connecting rod-crank system, transmitting the explosion forces generated in the combustion chamber to the crankshaft, allowing the conversion of the linear movement of the piston into rotary movement. Its resistance and dimensional precision are critical: any wear or excessive play compromises the alignment of the assembly, causing vibrations, loss of power and accelerated deterioration of the cylinder walls.

When to replace this part?

The piston pin requires inspection during each seasonal maintenance and should be replaced if abnormal clearances, visible wear, or if the engine exhibits unusual vibrations at certain revolutions are detected. Typical symptoms include clunking inside the engine, loss of compression, or rough running that is not corrected by adjusting the carburetion or ignition. Replacing this component preventively in major overhauls prevents costly secondary damage to the connecting rod, crankshaft and cylinder liners.

Mercury/MerCruiser

Equivalent manufacturer part numbers