SHIM KIT, FWD BEARING

Function and technical context

The front bearing shim set is an essential component in the marine transmission, responsible for maintaining precise alignment and spacing of the propeller shaft within the engine block. This kit works on the transmission system, allowing manufacturing tolerances and accumulated wear to be compensated to ensure smooth, vibration-free operation. An incorrect adjustment causes misalignment of the shaft, which generates excessive vibration, accelerated wear of internal components of the gearbox and, in severe cases, entry of water into the engine with the risk of irreversible damage.

When to replace this part?

The need to replace or adjust the rings in this kit usually arises after detecting unusual vibration in the drive shaft, excessive play in the bearing or loss of sealing in the front bearing area. It is recommended to check the condition and adjustment of the bearing during each seasonal maintenance, especially before starting the navigation campaign. Preventive replacement of the shim kit as part of major maintenance avoids more costly repairs resulting from secondary damage to the transmission and guarantees the reliability of the propulsion system in high-altitude navigation.

Compatible engines

Equivalent manufacturer part numbers