The spring tensioner (code K 27206) plays a crucial role in the operation of the Sulzer ZV40/48 diesel engine, manufactured by Adriadiesel, Jugoturbina, and Zgoda. This component ensures the correct tension in the fuel injection valve system, which directly impacts fuel atomization and combustion efficiency. Proper tensioning prevents fuel leakage and optimizes the engine’s performance, making it a vital element in marine and industrial engine applications. Regular maintenance and timely replacement of the tensioner are essential for maintaining engine reliability and fuel efficiency.