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06-10-2016, 10:30 AM
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#1
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Senior Member
City: Fort Myers FL
Vessel Name: Hobie Kayak
Vessel Model: Passport 12.0, 34 Mainship Pilot, Mako 24,32 Regal Commodore, PT-41 Trawler, 33 Chris Craft Cavalier
Join Date: Jul 2013
Posts: 285
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Help me drive my 34P!
Friend of mine took this shot of us last week. The large wake behind the boat bothers me.
Chardonnay has 2 240 hp Yanmar diesels. We cruised at 17 mph burning a little less than 1 gallon per mile, generator also running.
Comments? suggestions? Do I need to trim the bow down more? Up?
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06-10-2016, 10:37 AM
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#2
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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I am not getting the image.
Btw, kudos to you for considering your wake. As Bob Hale once said, "most boaters never leave bad wakes because they never look behind them to find out".
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06-10-2016, 11:39 AM
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#3
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Guru
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
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Looks more like prop was than wake. Are you well on plane? Is thee any more speed available? is this a roundish bottom boat?
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06-10-2016, 12:28 PM
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#4
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Guru
City: Punta Gorda, FL
Vessel Name: Aweigh
Vessel Model: Nordic Tug 42
Join Date: Jun 2014
Posts: 628
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06-10-2016, 01:12 PM
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#5
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Senior Member
City: Oriental, NC
Vessel Name: M/V Major Award
Vessel Model: Senator 35 w/single Lehman
Join Date: Oct 2007
Posts: 423
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Experiment with the trim and watch your GPS for speed change. Do at various rpm's.
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06-10-2016, 01:25 PM
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#6
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Senior Member
City: Fort Myers FL
Vessel Name: Hobie Kayak
Vessel Model: Passport 12.0, 34 Mainship Pilot, Mako 24,32 Regal Commodore, PT-41 Trawler, 33 Chris Craft Cavalier
Join Date: Jul 2013
Posts: 285
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Wake
Quote:
Originally Posted by bayview
Looks more like prop was than wake. Are you well on plane? Is thee any more speed available? is this a roundish bottom boat?
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I seem to be well on plane. The boat feels good. I am running at around 2800 rpm to get the 17 mph. She tops out at 3400 rpm making 25 mph.
The bottom is hard chine, semi-v. Not a round bottom.
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06-10-2016, 01:26 PM
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#7
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Senior Member
City: Fort Myers FL
Vessel Name: Hobie Kayak
Vessel Model: Passport 12.0, 34 Mainship Pilot, Mako 24,32 Regal Commodore, PT-41 Trawler, 33 Chris Craft Cavalier
Join Date: Jul 2013
Posts: 285
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Sea salt, thanks for getting the image to show in your post. How you do that? BTW, my boat lived in Punta Gorda for 10 years before I bought her.
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06-10-2016, 01:31 PM
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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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I have the same boat, but with the single Yanmar 370 hp engine. I have never seen the wake from the side like your picture.
But the boat's attitude looks good and your numbers look good. I hit 16 mph with the somewhat smaller hp single at 2,800 rpm (both engines are rated for 3,300). On mine it takes full trim tab down to do that.
BTW, 2,800 is a good conservative cruising rpm, presuming that your engines reach 3,300+ (real phototached rpm) at wot.
And relative to the next post about adding drop fins to the trim tabs, I installed them over the winter and so far I can't see much difference.
David
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06-10-2016, 01:37 PM
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#10
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Guru
City: Punta Gorda, FL
Vessel Name: Aweigh
Vessel Model: Nordic Tug 42
Join Date: Jun 2014
Posts: 628
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ljk
Go to the photobucket link in your post. Photobucket has 4 choices to copy pictures. The bottom one is IMG. Hover over the [URL=http//... and a hand appears. Left click and it says copied. The come back here and paste it (Ctrl V) into the box.
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06-10-2016, 02:15 PM
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#11
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Senior Member
City: Fort Myers FL
Vessel Name: Hobie Kayak
Vessel Model: Passport 12.0, 34 Mainship Pilot, Mako 24,32 Regal Commodore, PT-41 Trawler, 33 Chris Craft Cavalier
Join Date: Jul 2013
Posts: 285
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[QUOTE=seasalt007;450687]ljk
Go to the photobucket link in your post. Photobucket has 4 choices to copy pictures. The bottom one is IMG. Hover over the [URL=http//... and a hand appears. Left click and it says copied. The come back here and paste it (Ctrl V) into the box.[/QUOTE]
OK, thanks!
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06-10-2016, 02:26 PM
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#12
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Guru
City: Fort Lauderdale. Florida, USA
Join Date: Jan 2014
Posts: 21,449
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You may be a little below the ideal cruising speed for that boat.
As to the wake, how far back and to the sides does it go? To me it looks a lot like the props churning the water. From the photo I can't tell whether it ever really would impact others. I may be totally wrong, but would suggest you looking further.
Think a moment of a surface drive boat. They create a huge rooster tail behind them. It's so noticeable because the props are on the water's surface. Well, other boats have the same, just under the water. You may be at the speed that maximizes it.
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06-10-2016, 02:39 PM
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#13
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Senior Member
City: Fort Myers FL
Vessel Name: Hobie Kayak
Vessel Model: Passport 12.0, 34 Mainship Pilot, Mako 24,32 Regal Commodore, PT-41 Trawler, 33 Chris Craft Cavalier
Join Date: Jul 2013
Posts: 285
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Quote:
Originally Posted by BandB
You may be a little below the ideal cruising speed for that boat.
As to the wake, how far back and to the sides does it go? To me it looks a lot like the props churning the water. From the photo I can't tell whether it ever really would impact others. I may be totally wrong, but would suggest you looking further.
Think a moment of a surface drive boat. They create a huge rooster tail behind them. It's so noticeable because the props are on the water's surface. Well, other boats have the same, just under the water. You may be at the speed that maximizes it.
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Great thoughts, maybe its just the props. The wake behind the boat after the "rooster tail" is quite flat. I will experiment with higher speeds next time I am on her.
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06-10-2016, 02:46 PM
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#14
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Guru
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
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Relax, there is nothing wrong with your boat.
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06-10-2016, 03:09 PM
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#15
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TF Site Team/Forum Founder
City: League City, Tx
Vessel Name: Floatsome & Jetsome
Vessel Model: Meridian 411
Join Date: Oct 2007
Posts: 7,332
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Boat and wake look just fine!!!! David is correct. 2800rpm is a sweet spot for those engines provided they are propped correctly. I had a Pilot 30 II and it cruised at the same speed with the same power setting...but only one of the same engine. 15kts at 2800rpm. That is a great engine and coveted by most Yanmar techs.
__________________
Prairie 29...Perkins 4236...Sold
Mainship Pilot 30...Yanmar 4LHA-STP...Sold
Carver 356...T-Cummins 330B...Sold
Meridian 411...T-Cummins 450C
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06-10-2016, 03:24 PM
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#16
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Guru
City: Fort Lauderdale. Florida, USA
Join Date: Jan 2014
Posts: 21,449
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Quote:
Originally Posted by ljk
Great thoughts, maybe its just the props. The wake behind the boat after the "rooster tail" is quite flat. I will experiment with higher speeds next time I am on her.
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I doubt seriously that what you're seeing is impacting anyone.
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06-10-2016, 04:42 PM
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#17
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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Quote:
Originally Posted by BandB
As to the wake, how far back and to the sides does it go? To me it looks a lot like the props churning the water. From the photo I can't tell whether it ever really would impact others. I may be totally wrong, but would suggest you looking further.
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I think B is on to something. Now that I can see the photo, I would bet that if you look at the wake 2 boat length astern it will not be significant.
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06-11-2016, 02:21 PM
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#18
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Veteran Member
City: North fort Myers, fl
Vessel Name: Cara Mia
Vessel Model: Mainship 34 Rumrunner
Join Date: Sep 2014
Posts: 32
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LJK, I have the same boat, with twins 240hp Yanmars. At 2800 I'm doing just about the same, my wake is not bad at all. When I slow to 10 mph my wake is really big, it's only good for when the Dolphins are around. I'm usually doing 8mph or mid teens.
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06-11-2016, 08:19 PM
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#19
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Senior Member
City: Fort Myers FL
Vessel Name: Hobie Kayak
Vessel Model: Passport 12.0, 34 Mainship Pilot, Mako 24,32 Regal Commodore, PT-41 Trawler, 33 Chris Craft Cavalier
Join Date: Jul 2013
Posts: 285
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Thanks all. Guess I won't lose any sleep over my wake. Can't wait to experiment the next time we are on her!
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06-15-2016, 02:01 PM
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#20
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Senior Member
City: Jarrettsville, MD.
Vessel Model: Mainship Pilot 30' Rumrunner
Join Date: Mar 2015
Posts: 157
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I occasionally look back and it doesn't look much different then what my boat throws doing 18 knots with a single 315 Yanmar. Your trim looks even better but I don't get a chance to look at mine from the side?
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