This Scanmar link is an interesting story about an inboard engine
replacement.

With the cost of inboards on sailboats it kind of makes me wonder what
is the largest outboard put on the largest sailboat and how it was
configured and located. I have seen a 25HP on a 30ft Grampian
(transom mount) when the A4 gave=up.

I wonder how an outboard could be used on a larger sailboat somewhere
other than the Transom, possibly in a specially designed lazzerette...

http://www.scanmar-yachts.com/docs/I...aintenance.pdf

http://www.scanmar-yachts.com/NewEngineInstall.htm

Rebuild or Replace; or, How To Throw Good Money After Bad

http://www.scanmar-yachts.com/NewEngineInstall2.htm

Installing the New Yanmar

http://www.btri.com/boat/index.html
"During the Fall of 2000 and Spring of 2001 I replaced my Farymann
K30M with a Yanmar 1GM10. I took pictures along the way. In these
pages I will show you how I did it, and tell you about the decisions
made and the lessons learned. This is not a how-to manual, but you may
get some ideas for your engine installation, or learn something about
the pitfalls of such a project."

"The first decision: whether or not to do it at all. An engine upgrade
in an older boat will cost a substantial portion of the boats value.
You will never get all this money back when you sell the boat. You
will also spend much more than the cost of the engine. In my case the
engine was about $4600.00 and the aditional gear was another
$1500.00."

Excellent with lots of images.......XXXXXXXXXXXX

http://www.boatus.com/goodoldboat/Marine_exhaust.htm

Guidelines for evaluating and installing wet exhausts

http://www.ketogroup.com/press/Soundproofing%203.pdf

article on soundproofing is here (500 kb pdf download)

http://www.pocketcruisers.com/art_soundreduction.html
Engine Compartment Soundproofing
By Nigel Charlesworth JR CO26 #176 (UK)

http://www.solopublications.com/sailcol.htm0
Advice About The Outboard Well

http://www.docksidereports.com/sail_...uxiliaries.htm

Sail Boat Auxiliaries
And Why They Don't Last as Long as They Should
by David Pascoe

'So there you have yet another reason why I say that sail boat engines
are usually poorly installed and why they often don't last as long as
they should."

"Factors That Affect Diesel Auxiliary Engine Life

Under ideal circumstances, sail boat diesel auxiliary engines should
last the life of the boat. That they rarely do is usually the result
of two things: (1) Failure to maintain properly and, (2) faulty
exhaust system installation."