The best way is to pull the outdrive and check them by hand. It is not
unusual for there to be some vibration on a hard turn, particularly if the
drive is trimmed up or down some at the same time.

"doug" wrote in message
...
Is there any way to tell the difference between gimbal bearing or
universal
joint failure. At the end of last season my boat (1984 bayliner,305, volvo
280) started to vibrate when I made turns hard to port or starboard or
even
when in the slip at low rpm it still had the vibrations when I turned the
wheel hard one way or the other.At top speed going straight it was smooth
as
silk.I appreciate any help you can give.
Thanks, Dugb