Noisy Cutless bearing a problem?
ever since I brought my boat I have had a bit of a concern with the cutless bearing. Above 1,500rpm it vibrates and makes a noise that is noticable in the back cabin. At less than 1,200rpm it is not detectable at at 1,900RPM (normal cruising speed) it is fairly loud. The vibration appears to be at the end closest to the engine / away from the prop (I can reach in and grab the outside and there is almost no vibration at the prop end where it goes thru the hull, all the vibration is at the other end).
We have now had the boat for two and half years and have sailed approx 2,000 nautical miles and the noise does not appear to have changed.
I also understand that the PO replaced the prop shaft approximately six months before I purchased the boat. I believe he fitted the prop shaft and cutless bearing himself. I have found some of his work to be variable.
My inclination is "don't fix what's not broken". As it has lasted 2 1/2 years / 2,000NM I should leave it & spend my time / $ on other things that do need fixing (auto pilot, generating capacity, etc etc).
However wondering if their are any other opinions out there? Are noisy cutless bearings common or should I be ripping the the thing apart ASAP?