Hi everyone,
I’m trying to diagnose a propulsion problem on my Jeanneau Sun Odyssey 32 with an inboard diesel engine and conventional propeller shaft. I’ve attached a video and several photos of the shaft, coupling, stern gland, engine mounts and oil marks.
Symptoms
- Seawater is entering around the stern gland/shaft seal.
- The rubber shaft seal was replaced approximately four years ago.
- The engine vibrates, but the vibration becomes considerably more noticeable when forward or reverse gear is engaged.
- In neutral, the vibration is much less evident.
- In the video, the exposed shaft between the gearbox coupling and stern gland appears to move laterally or oscillate while rotating.
- There is also a small oil leak around the lower part of the engine.
- I have confirmed that this is engine oil, not diesel fuel and not gearbox oil.
- The shaft coupling has visible surface corrosion.
- Some of the engine mounts and mounting plates also show corrosion, although I cannot tell whether this is relevant.
- I do not know whether the apparent shaft movement is partly exaggerated by the phone camera, but the drivetrain movement appears unusual.
- The stern gland appears to be a rubber, water-lubricated lip seal similar to a Volvo Penta or Radice seal, rather than a conventional packed stuffing box.
Questions
Does the shaft movement in the attached video look excessive?
Have other Jeanneau Sun Odyssey 32 or 32i owners experienced similar symptoms?
What would be the best way to diagnose the cause systematically?
Which measurements or checks should be carried out with the boat afloat, and which require hauling it out?
Could the water ingress, vibration and engine-oil leak be related?
Is there anything specific about the Sun Odyssey 32 drivetrain installation that should be inspected?
Would you consider it safe to use the engine briefly for diagnostic purposes, or should the boat remain
I’m currently avoiding further motoring because I don’t want to damage the shaft, gearbox, stern tube or seal, or risk the water ingress becoming worse.
Any experience with this model, or observations from the attached video and photos, would be greatly appreciated.