SILENT LOCK 688-44555-00 REC688-44555-00

Function and technical context

The Silemblock 688-44555-00 is an elastomeric mounting block that integrates the engine fixing and damping system in Yamaha boats. This component absorbs the vibrations generated by the propeller and dampens dynamic movements during operation, protecting the engine from impacts and mechanical stress. Its function is critical to maintain the correct alignment of the drive shaft and prevent the spread of vibrations to the structure of the boat. The failure or degradation of this element causes misalignment of the propeller, the appearance of abnormal noises in the engine room and premature damage to adjacent components of the propulsion system.

When to replace this part?

Typical signs of wear include noticeable excessive vibrations in the rudder or boat frame, creaking or grinding noises from the engine area during acceleration, and visible movement of the propeller at rest. It is recommended to inspect the condition of the Silemblock at each annual maintenance check, especially if the boat is used in rough waters or with frequent acceleration. Preventative replacement of this component prevents more costly repairs resulting from prolonged driveshaft misalignment and accelerated wear of structural components.

Yamaha Engine Compatibility

Equivalent manufacturer part numbers