Short Wave Sportfishing wrote:
On Sat, 01 Sep 2007 00:03:39 -0400, Wayne.B
wrote:

On Fri, 31 Aug 2007 23:17:34 -0400, wrote:

I came up with this (52 GPH)

http://www.yamaha-motor.com/assets/p...n-tri-f350.pdf

Triples! That would definitely do it.

Considering it is 11,000+ lbs as tested, 36 ft long, doing 50+, not
too bad actually for gas engines, just a little tough on the gas
budget. I have neighbors with I/O speed boats in that size range that
burn about the same.

I was looking at a Cape Horn and the guy is selling the boat, but
keeping his engines. I was seriously considering that Yamaha 350 as I
wouldn't have to use duals - I seriously want to uncomplicate my boat
life.

I'm not so sure I'm going to do that. Yamaha is making some claims
that I'm not convinced are - er...Kosher. :)



Are you referring to Yamaha's performance sheets? My experience with
them, though limited, indicates they are spot-on. The other Yamaha
owners I have talked to with all manner of boats indicate they are
damned close to their results.

Maybe you should come by here after the Annapolis powerboat show. The
local Grady/Parker dealer puts on a couple of days of water demos with
help from the factories. I am sure there will be several boats with
350's mounted, and you can try them out. Some years ago, at that event,
I got a ride in the first and only diesel jackshaft 28' Parker built.
Cool ride on a really rough day. That exact boat is up for resale by its
original owner. Is it just the fuel burn that intrigues you?

My new boat/motor combo hasn't been tested by Yamaha, so I got a
performance sheet from the Parker factory, which runs its own tests. The
guy who ran the tests told me my results would be a bit better than his,
and he was dead on, including the fuel burn. It really serves no purpose
for these guys to put out made-up numbers.