We just replaced the prop shaft seal with the 29mm lip seal. Aletes was on the hard and the bow thruster was dipping oil the next day. Thinking we may have damaged the lip seal during installation, we replaced it with our spare 29 mm seal. Oil was leaking at the lip seal within minutes of being added. Could it be that the slightly smaller opening diameter of the lip seal is causing a distortion that defeats its effectiveness? Will try a 30 mm as see if that works. Have others had success with 29mm seals?
Mike
Aletes SM#240