The Sulzer ZV 40/48 engine, widely used in marine and industrial applications, incorporates a spring plate for the shut-off piston, identified by code number K 46113, with the specific part code K 46115. This spring plate plays a key role in controlling the shut-off piston’s movement, ensuring precise operation during engine shutdownemergency stops. Proper functioning of this spring plate is critical for maintaining engine safety, reliability, and responsiveness, as it ensures smooth piston movement and efficient sealing during the shut-off process. Regular inspection and maintenance of this component are vital for optimal engine performance.