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jbh1024
Intermediate Member
54 Posts |
 Posted - 03/17/2012 : 10:13:34 AM
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| the four stroke that was put on my boat is much heavier than the 2 stroke it was designed for. its not a major problem, but i would like to get the back end to sit up a little more when sitting still, is there anything that will give it positive floatation without dishing out the money and trouble for something like an armstrong bracket? the boat is a 20 ft center console. |
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mrhardware
Senior Member
569 Posts |
Posted - 03/17/2012 : 12:29:05 PM
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How difficult would it be to move the gas tank forward?
Mr Hardware |
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Easy
Senior Member
2818 Posts |
Posted - 03/17/2012 : 12:39:32 PM
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| I think about all you can do is load it heavy in the bow. Ice chests and such. Put your fatest fishing buddy in the bow and make him stay there. |
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PalmerScott
Senior Member
774 Posts |
Posted - 03/17/2012 : 11:08:19 PM
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Putting the motor on a braket will actually increase the moment around the center of buoyancy = worse, not better.
As others have said, move any possible weight forward.
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17' Henry O Hornet
26' Palmer Scott
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Edited by - PalmerScott on 03/18/2012 6:06:38 PM |
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spareparts
Senior Member
931 Posts |
Posted - 03/18/2012 : 07:43:03 AM
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| start by moving the batteries forward, then look at anything else that can be moved. What kind of boat and what size motor? |
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saltydog235
Senior Member
9671 Posts |
Posted - 03/19/2012 : 08:07:23 AM
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Move your batteries as far forward as possible. Put the heavy cooler in the bow. Add some lead sheets to the anchor locker in the bow to gain balance, when you get the right combo, glass them in.
Mark
Mako 262 Twin Yammaha F200s
Yeah, but do you consider a dog to be a filthy animal? I wouldn't go so far as to call a dog filthy but they're definitely dirty. But, a dog's got personality. Personality goes a long way.
"Life's tough......It's even tougher if you're stupid" John Wayne
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Mandopickr
Senior Member
378 Posts |
Posted - 03/19/2012 : 3:39:25 PM
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| Trim tabs. |
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Easy
Senior Member
2818 Posts |
Posted - 03/19/2012 : 7:07:45 PM
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| Trim Tabs, won't help when he is sitting still! |
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13skulls
Senior Member
601 Posts |
Posted - 03/20/2012 : 5:14:58 PM
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| When I repowered I added an additional 300lbs in motor weight to the stern. It lowered the rear by about 2" and took a while to figure out the sequence of throttle/trim tab manipulation to get moving without the bow pretty high. As far as sitting still I really haven't noticed much change. But as mentioned earlier, put some heavier junk in the bow. |
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Mandopickr
Senior Member
378 Posts |
Posted - 03/20/2012 : 5:17:04 PM
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Trim Tabs, won't help when he is sitting still
Sorry, should have read the msg closer. |
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Easy
Senior Member
2818 Posts |
Posted - 03/20/2012 : 5:32:43 PM
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| I know I shouldn't say it, but what the hell! Make the wife sit in the bow. |
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MattR
Senior Member
551 Posts |
Posted - 03/20/2012 : 5:59:39 PM
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quote:
Originally posted by Easy
I know I shouldn't say it, but what the hell! Make the wife sit in the bow.
This made me LOL. 
2000 McKee Scoundrel 160, Honda 75hp |
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TyOneOn
Senior Member
836 Posts |
Posted - 03/21/2012 : 03:48:04 AM
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quote:
Originally posted by 13skulls
When I repowered I added an additional 300lbs in motor weight to the stern...
Some of these formulas are pretty simple. If you put 300 pound behind the center of gravity you need to add 300 pounds in front of the center of gravity.
I'm not a smart ass. Really.  I'm trying to help. In sail boats, they add fixed weight to balance the boat. You can/could probably add weight with lead ingots epoxied in place, towards the bow of the boat. It's a retrofit so, you need to spread them out to distribute the weight. A concentrated load like a big cooler or a wife (sorry! just a joke) can do damage to the hull or deck. Add weight forward BUT distribute it over a wide area. |
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TyOneOn
Senior Member
836 Posts |
Posted - 03/21/2012 : 05:32:29 AM
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| By the way... I have pictures of this method, if you want to see it? It's pretty simple. |
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jbh1024
Intermediate Member
54 Posts |
Posted - 03/22/2012 : 07:45:32 AM
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| havent been on in a few days, thanks for all the input from everyone. i was trying to keep from adding more wieght to the boat, but if its what i have to do then oh well. |
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spareparts
Senior Member
931 Posts |
Posted - 03/22/2012 : 1:25:30 PM
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| what kind of boat and what motor? |
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jbh1024
Intermediate Member
54 Posts |
Posted - 03/23/2012 : 06:00:26 AM
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| its a 2002 flare 20 ft with a 2006 135 honda. i think the boat originally came with a 125 johnson |
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spareparts
Senior Member
931 Posts |
Posted - 03/23/2012 : 11:10:54 AM
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| sorry, not familiar with that brand of boat |
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Phin
Prolific Poster
12897 Posts |
Posted - 03/23/2012 : 12:41:29 PM
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flotation boxes are the only thing that can do what you're talking about unless you physically remove weight from behind the center of gravity to try and counteract the weight you've put behind it. This was why folks mentioned fuel and batteries moving forward in your rig. Flotation boxes would have a bottom edge higher than your running surface. Would only lift your stern when sitting still by having enough water displaced by the boxes to lift.
If you have to do a major overhaul of the boat at any point you can cut down on some weight by cutting any wood coring out and going back with foam core and some design changes like that. Have to be careful though. Very easy to screw up a good boat. You may already be at that point and perhaps may want to look at swapping your motor with a lighter one if the problem is that big... ?
Simplest thing to do short term may be for you to plumb check valves in your scupper drain lines and also trim tabs.
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www.scmarine.org
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www.joinrfa.com
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Luke 8:22-25
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Edited by - Phin on 03/23/2012 12:43:16 PM |
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eightnic8
Senior Member
1174 Posts |
Posted - 03/23/2012 : 12:59:58 PM
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Buddy of mine has a few sandbags in his anchor locker up front to level his out....
06 sea pro 1900sv
"Reel Estate"
06 14ft Alumnacraft
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stonoman
Prolific Poster
12270 Posts |
Posted - 03/23/2012 : 6:10:28 PM
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Live with it.Not much you can do.My scuppers suck due to the 225 weight.They sell the rig with a 150 but it is rated for 225
Stonoman |
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rwidman
Senior Member
306 Posts |
Posted - 03/30/2012 : 09:06:08 AM
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Moving the fuel tanks doesn't really help because the weight gets less as the fuel is used up. Adding weight to the bow will level the boat, but it's inefficient to haul around extra weight. It hurts performance and economy.
Moving the batteries is expensive because of the heavy cables required and batteries don't do well with the heavy pounding they would take in the bow.
The real solution is a lighter motor.
Ron
2000 Camano Troll
North Charleston, SC |
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Flyvet
Senior Member
186 Posts |
Posted - 03/30/2012 : 2:10:12 PM
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I agree. Shifting weight forward would help some but I wouldn't ADD weight. I suspect that at rest it would sit the bow deeper but may not actually raise the stern. The boat will sink until the volume of water displaced equals the boat weight so the bow being narrower would mean the bow would sink deeper per the same weight than the broader stern.
18.5 Baycraft Flats Edition
Johnson 150 Oceanrunner
Wood Driftboat
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four stroke to heavy
