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Ondatboat
PostPosted: Tue Jul 15, 2014 12:07 pm 
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Tadpole

Joined: Mon Jul 29, 2013 7:43 am
Posts: 1
Hey folks ... I have had my 355 for 2 summers now and have really been enjoying the boat. But I am wonder what the best (most ecominical) cruise sppeed is? I have cruised any where from 3500 RPM up 4200 RPM .... it all feels good but I figure there must be a sweet spot .... Any ideas out there?
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efollis
PostPosted: Tue Jul 15, 2014 3:02 pm 
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Dolphin
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Joined: Fri May 16, 2014 8:17 pm
Posts: 99
Location: Bridge Port Marina - Orillia
Lots of hours this past week in my 348 (2005), and depending on gas / water on board, I found 3400 rpm was perfect and gave me around 29 mph on GPS. Lower rpm brought me off plane in large chop or sharp corners, and 3700 gave better speed - but I was in no big rush. This was with 5.7 stern drives.

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Ernie Follis
It'll Do II
Four Winns 348 (2005)
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mkivbren
PostPosted: Fri Jul 18, 2014 9:15 am 
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AGE < LOA

Joined: Tue Mar 13, 2007 8:53 pm
Posts: 739
I just sold my 338 and ran her 9 hours straight with the new owners for delivery. No flow meters but we did surprisingly well at 3750-3800 rpm, about 28.5 mph ave. Engines are the 6.2 mercs. edit - to concur with jinizi, I estimated 1.2mpg. perfectly clean bottom keep in mind!

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Chris Craft Catalina 23 w/ 300 G2
Previously-V338, 248 Vista, H210


Last edited by mkivbren on Fri Jul 18, 2014 12:35 pm, edited 1 time in total.

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jnizi
PostPosted: Fri Jul 18, 2014 10:37 am 
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email admin your custom rank

Joined: Tue May 16, 2006 8:11 am
Posts: 514
Location: Lombard, IL
I see about the same, 3800rpm is about 29 mph and we are about 1.1 - 1.2 mpg. We have the 6.2 w. Bravo 3.

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2007 Vista 338 "Better Yet"
Previously:
2007 Vista 258 " Just Right"
2005 Horizon 230
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Paul I.
PostPosted: Fri Jul 18, 2014 11:32 am 
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Joined: Sun Nov 21, 2010 8:03 am
Posts: 2238
Location: Winthrop, Ma.
I have a Sig 290, BUT I would install 2 flow meters and connect them to your GPS. This will give you MPG an GPH.

Sea/lake conduction change from time to time. So your speed and trim will to. So now you can get the most out of it any time.
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