On Tue, 12 Aug 2003 18:40:36 GMT, "Scot" wrote:

Hello, I have a client looking a purchasing a Used Sea Ray 400DB. One has
Cat C3126TA and the other has Cummins 6TCA. besides HP. What are the
other feature benefits for both of these? Thank you in Advance

Scot and the rest of you...

I'd like to point out that of 15 replies, none directly compare these
two engines. If it weren't for Google/Deja News, these threads would
be lost in just a week or two because the senseless bantering clogs
the news servers and so they throw away articles quickly. And it's
frustrating to search Usenet only to find a related topic but loaded
with sideline drivel.

A close friend repowered two boats - mine, a 35' woody displacement,
with a 6BT Cummins, and his, a 48' tiawan fiberglass trawler, with a
CAT C12.

The Cummins is a slightly lower rpm engine and may not like getting
the Sea Ray up on a plane. You need to closey compair the torque
curves for the rpm range and speed you expect to run given the prop
you plan to use. I know very little about the CAT, but my feeling is
that it's more refined and has more top end than the Cummins. I love
my 6BT, but I can't imagine it pushing a planing hull (your 6CT has an
even longer stroke at 135mm vs my 6BT at 120mm and the CAT at 127mm).