a light and paper towels, and the vibration, it may be just one. No one touched it. I read the thread you posted and it confirms what I already suspected - that if I touch this thing I will really screw it up. I talked to a mechanic who is going to come out to the boat on Monday (if I can get there) and walked me through his procedure. His first reaction was o-rings. Said he can rebuild, replace, etc. for a couple of hours. I am reluctant to even pull it.
I will keep you posted. Here's my guess - $650.