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05-12-2016, 09:54 PM
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#1
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Senior Member
City: Freeport, N.Y.
Vessel Name: Guns 'N' Hoses II
Vessel Model: 2004 34' Pilothouse Sedan
Join Date: Oct 2014
Posts: 260
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Are these numbers accurate
I have a 2004 34 Pilot Sedan with twin yanmar 240's. While searching various links I came across this page. Do the mph/kph seem correct? I don't come close to the top end speed shown and my mid range numbers are lower as well. I would be interested in other people's numbers. Thanks for any information you can provide.
Yanmar Performance Data
__________________
Kevin
2004 Mainship 34 Pilothouse Sedan
Twin Yanmar 240's
Freeport, NY
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05-13-2016, 08:29 AM
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#2
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Valued Technical Contributor
City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,785
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I also responded on the Mainship forum. For my Pilot 34 with a single Yanmar 370, I get 2-3 kts less. That was also my experience with a Mainship 34T.
Edit: Based on the post below I went back and checked the 34T's numbers. They are actually much closer to my experience, maybe a half knot less.
David
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05-13-2016, 09:06 AM
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#3
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Veteran Member
City: Redondo Beach
Vessel Name: Mainia
Vessel Model: Mainship 390
Join Date: Oct 2011
Posts: 61
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34 Trawler numbers
The numbers for a 34 trawler with a single 6LYA aren't far off from what I've seen/measured.
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05-14-2016, 09:27 AM
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#4
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Veteran Member
City: Southampton
Join Date: Jul 2014
Posts: 71
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My impression is that factory tests are usually done with brand new boats, shiny bottoms and running gear, minimal load. These plus many othe variables such as water temperature, air temperature, humidity, wind, waves mean that you would be very unlikely to see the same numbers on your own boat.
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05-14-2016, 09:45 AM
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#5
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Guru
City: San Diego
Vessel Name: Circuit Breaker
Vessel Model: 2021..22' Duffy Cuddy cabin
Join Date: Oct 2007
Posts: 6,691
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Quote:
Originally Posted by Recb
My impression is that factory tests are usually done with brand new boats, shiny bottoms and running gear, minimal load.
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__________________
Done with diesel power boats! Have fallen in love with all electric!
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05-14-2016, 09:06 PM
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#6
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Senior Member
City: Freeport, N.Y.
Vessel Name: Guns 'N' Hoses II
Vessel Model: 2004 34' Pilothouse Sedan
Join Date: Oct 2014
Posts: 260
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Update on the numbers. Took the boat for its first cruise of the season with the bottom freshly painted after a good sanding 3/4's of a tank of diesel, full water tank, about half the normal equipment, and the Admiral. WOT was 24.7 knots and cruised at 16 knots at 2600 rpms. This was the first season we had the boat with a new bottom paint. So I guess the moral of the story is nothing beats a shiny well manicured bottom. .
__________________
Kevin
2004 Mainship 34 Pilothouse Sedan
Twin Yanmar 240's
Freeport, NY
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05-15-2016, 06:52 AM
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#7
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Veteran Member
City: Southampton
Join Date: Jul 2014
Posts: 71
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Definitely clean bottom and hardware are key. Another one, although impact is not as dramatic, are properly calibrated props. Improves efficiency and reduces vibration.
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05-15-2016, 08:32 AM
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#8
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Valued Technical Contributor
City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,785
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Those are very good numbers for that boat/engines.
David
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