We purchased a 1987 vessel with a bit over 1300 showing on the engine hour meter. Since the boat was primarily used as a stationary houseboat for the past decade, I could believe that the hours were correct. Boat ran smooth as silk on sea trials despite broken engine mount and the fact that only two bolts were tight in the coupling and one was missing entirely (this discovered after the surveyor left).
Now we are getting into the shafting and have discovered this wear. It's making me wonder about that engine hour meter. OTOH, this boat has an enclosed shaft log with no way for water to lubricate it other than working its way in through the bearing from the back. I hope this, and the lack of any flow to flush out silt, is the cause of the wear and not the fact that we have engine hours commensurate with this level of wear.