PIN 17-825956 PAF25-05050016

Function and technical context

Cylindrical pin 17-825956 PAF25-05050016 is a precision positioning and alignment element that works inside the marine engine, ensuring that timing system components maintain their exact position during operation. This PIN dowel is essential in the construction of the engine block and cylinder head, where it supports constant vibration and pressure loads without allowing displacements that compromise mechanical integrity. Its correct assembly is essential to avoid misalignments that could affect power transmission, the hermetic seal of the joints and the general durability of the internal mechanisms of the propeller.

When to replace this part?

Dowel pins rarely require replacement under normal service conditions, but should be inspected during engine disassembly, especially if knocking, abnormal vibrations have occurred, or if unexplained compression loss has been detected in a combustion chamber. Although they do not have a preventive maintenance interval like filters or impellers, it is advisable to check their condition and tolerance whenever the engine is opened to repair gaskets or distribution components. Replacing this item during a major repair avoids alignment issues and internal leaks that would otherwise require a costly reopening of the booster.

Mercury/MerCruiser

Equivalent manufacturer part numbers