The Sulzer ZV 40/48 is a robust marine diesel engine known for its reliability in demanding environments. A torsion spring for the shaft, designated as K 46166 with code number K 46185, is a vital component designed to absorb and mitigate torsional vibrations during engine operation. This spring plays a key role in maintaining smooth torque transmission and reducing stress on the engine’s shaft and connected systems. Proper maintenance and timely replacement of this part ensure optimal engine efficiency, durability, and reduced risk of mechanical failures