On 2007-10-16 07:26:21 -0400, "Roger Long" said:

"Dennis Pogson" wrote

Fit an AquaDrive and all your engine vibration will vanish.

True, nothing smoother. Evolution has a similar set up.

However, few sailboats will have the necessary space between the stuffing
box and the engine. The CV joint need some offset to keep them from wearing
on one spot so the engine will need to be raised or lowered in a retrofit.
Many boats will need extensive modifications to the beds so that the thrust
from the thrust bearing can be accomodated.

These are more practical when the boat is designed for them. Retrofits can
be very problematic.

Xan-à-Deux has an old DriveSaver, essentially a half-inch rubber disk
between the transmission and shaft designed to self-destruct if we wrap
a line while motoring. Believe they changed the design since, but the
newer version seems to be similarly compact and able to take up minor
variations.

The engine still has to be fairly properly aligned because the
DriveSaver isn't intended for that purpose, but it smoothed the slight
problem I hadn't known we had. (Thought it was normal.) I later
re-aligned.

--
Jere Lull
Tanzer 28 #4 out of Tolchester, MD
Xan's pages: http://web.mac.com/jerelull/iWeb/Xan/
Our BVI trips & tips: http://homepage.mac.com/jerelull/BVI/