"Wayne.B" wrote in message
news
On Wed, 3 Oct 2007 13:55:08 -0400, "Eisboch" wrote:

My Egg had the 450 Cat turbos and I
could never hear the turbos spooling up ... just the engines. I think the
V8 Cat diesels are quieter.

I could be wrong but I think a lot of the difference between boats is
because of the amount and quality of the sound insulation. All of
these engines are loud when you are right next to them. Some of the
newer sound materials are very, very good.

But there is the Cummins out of Dodge trucks. They may be a lot cheaper.