RETAINER 689-44366-00 REC689-44366-00

Function and technical context

The 689-44366-00 seal is part of the sealing system of the marine engine, sealing the propeller shaft or transmission components to prevent the entry of salt water into the engine block. This component works in extreme conditions of humidity, salinity and hydrostatic pressure, protecting itself through a mechanical seal that maintains the integrity of the lubrication system. Its deterioration allows seawater to seep in, causing internal corrosion, accumulation of saline sediments, loss of lubrication and, ultimately, shaft seizure or irreversible damage to adjacent bearings and seals.

When to replace this part?

Typical symptoms of seal wear include water emanations in the installation area, presence of salt water in the oil pan (verifiable by inspection of the lubricant level and color), abnormal vibration in the drive shaft and visible rust around the seal housing. It is recommended to check its condition at each oil change or at least once per intensive navigation season; Its preventive replacement avoids costly repairs at sea and guarantees safe navigation without risk of engine hydrolysis.

Equivalent manufacturer part numbers