"Dave Hall" wrote in message
...
On Mon, 25 Jul 2005 22:13:13 -0700, "Mr Wizzard"
wrote:

So I got this cheap(er) 2005 Bayliner 175 Capi,
and I noticed that the Merc 3.0L/A-1 is louder
than other, and older Bayliners. I also notice
that some of the older Capi's w/ the 3.0L/A-1
has this foil-backed fiberglass insulation that is
taped to the inside of the engine cover. So I
got to thinking, can I insulate the inside of my
engine cover, and other surrounding surfaces
in, and around the engine compartment to help
deaden the engine sound? This 175 also doesn't
have a padded seat on top of the engine cover,
so there is really nothing to absort/deaden the
sound. Not a big worry, just wondering...

Thanks


I have a 1995 3.0L in a 19' Sea Pro cuddy (Alpha 1 Mercruiser
outdrive). The engine cover has a foam rubber type egg crate design
liner stapled/glued on the inside. Pretty much a thin, very slightly
padded, exterior cover. It seems to deaden the sound pretty well. If
you have room under your cover the foam egg crate padding would be
worthwhile. I assume it is probably somewhat special to take the heat
generated by the engine. I am not sure that foil backed glass
insulation will absorb that much sound.

The Other Dave Hall

I would strongly advise against installing any sort of highly combustible
material on the underside of the engine box such as flexible expanded foam
or rigid expanded foam unless it was *completely* surrounded by high
temperature/high grade foil or covering intended for the underside of engine
boxes or engine hoods.