PISTON YAMAHA STD REC6E0-11631-00-98K

Function and technical context

The piston is the fundamental moving component of the marine engine's combustion system, responsible for converting the thermal energy generated by the explosion of fuel into mechanical movement. It works inside the cylinder performing an reciprocating movement that transmits power to the crankshaft through the connecting rod. Its correct operation is essential to maintain proper compression, combustion chamber sealability, and the efficiency of the engine's thermodynamic cycle. A worn or damaged piston causes loss of compression, gas leaks, excessive fuel and lubricant consumption, as well as a significant reduction in available power.

When to replace this part?

The pistons require replacement when symptoms such as difficult starting, progressive loss of power, bluish smoke in the exhaust, abnormal oil consumption or irregular engine vibrations are detected. This standard measurement kit is designed to maintain the original engine tolerances and must be installed following major maintenance protocols or when cylindrical wear is verified by measurement. It is advisable to preventively replace the pistons during a complete engine overhaul to avoid emergency repairs while sailing and ensure optimal performance of the boat.

Equivalent manufacturer part numbers