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We have a President 35 with twin 225HP Lehman turbo diesels coupled to a
pair of 23x23 four bladed props. We cruise at 8 kts with 1600 rpm and this
seems to be the sweet spot for this boat. Higher rpms add a little speed,
but not enough to warrant the extra fuel consumption. Your setup sounds
similar and I would not change anything.
Greg Steckel
M/V Different Drummer
President 35 Sundeck
Frog Mortar Creek, MD
www.chesapeakebayboater.com
www.fmyc.org
----- Original Message -----
From: "Don Beadle/Joann Buell" <>
To: <>
Sent: Thursday, August 02, 2007 11:38 AM
Subject: T&T: Ongoing Gulfstar saga
> In 2000 we bought a 1981 38' Gulfstar Sundeck motor cruiser and put
> 2500 hours on the Perkins 4.236T engines over the next five years...I
> thought we were thru cruising at age 75 and sold her..(The two
> happiest days??) and we tried to retire to life on land...We soon
> discovered that we were NOT thru cruising so we've just bought a 1980
> Gulfstar with the same hull design and same engines...(Better the
> Devil you know??)..This Gulfstar had been a live-aboard for years and
> had been dock-bound for all that time, but she was a bargain (?) and
> we really love bringing her back to shape..We cleaned her up a bit and
> brought her from the East Coast of Florida to the West Coast over a
> four day period...She ran fine but used about a quart per day per
> engine but no smoke..
>
> Both boats are propped with 22 X 22 four blade wheels..The 1981
> cruised at 8 knots at 1800 rpm with a 2400 WOT rpm...I cruised the
> 1980 at 1800 rpm also without checking WOT rpm until the last
> day...When I checked belatedly the WOT rpm I found she only turned
> 2050 rpm in gear but 2500 out of gear...I then found that I could
> maintain the 8 knot cruise by throttling back to 1650 rpm...My concern
> is whether or not this is an efficient rpm for these turboed diesels?
> They quit using oil at the lower rpm..I believe I had them in a strain
> the first part of the trip..
>
> I ran thru the Michigan propeller test and the wheels it suggested
> were 24 X 16...which they would be happy to sell me at $1950
> each...I'd like to keep the ones I have, thank you...Any thoughts from
> the group would be appreciated...
>
> Don & Joann Beadle, the Gulfstar 'Misbehave'
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