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Pontoon Fiasco

500bbc

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If the mounts that were to be relocated are the mounts on the toons, they should have been lowered (to raise the toons up).

Raising the mounts on the boat decking would lower the mass.

Wondering if the mistake was the direction of the mount relocation

Either way... somebody is gonna eat shit on this fix.
No relocation, removed and reinstalled same position.
Owner requested toons to be raised relative to the deck.
 

500bbc

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How about ballast tanks in the toons, like a submarine. You could pump water in and lower the ride, or use it to balance out an uneven ride, or pump water out to go where it’s shallow.
Engineering?
 

rightytighty

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Seems like a huge awe shit, someone should have had some specs. on weight difference and buoyancy.

Adding weight seems like less than an ideal option, but if it's low and equally spread to match the original weight maybe its the right choice.

Sitting higher and having the new toons lighter than the old ones does this create a lack of ballast issue? causing this thing to be top heavy and unstable? It might be a stupid question but not really knowing what it looks like It's just a thought.
Tipppy or Top heavy is my concern. Those toons look to be 36" ish tall ( hard to tell, nothing to scale with). Even at 48" tall, having it 18" higher than before makes me nervous. I would not like to be side rolled by a passing surf boat, one bit. When I built my barge ( 45 x 10 and about 16K pounds), I worked hard to get it at about 50% submerged. This gives me plenty of float for big weekends if 20-30 people stop by for a visit, while still feeling "down in" the lake when a surf boat passes. ( my barge goes 5 knots, with square pontoons), so may not be the same for round tubes but be careful... I don't allow people up top when chugging for the same reason.
 

rightytighty

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The good news is water displaces about 60lbs a CF and the volume of the tubes is simple to determine, so it is east to figure what the rig weighs now, after the float test. From there, you'll know how much weight needs to be added for the desired level.
 

Crazyhippy

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Quick and dirty calculations, aluminum is ~ 1/3 the weight of steel. If they used the same thickness material (normally would expect thicker aluminum to be used, but worst case calculations) each tube goes from ~500 lbs to ~200lbs. 3x over is a 900lb swing.

If you put 5 people on a pontoon boat, it doesn't sink 18" into the water! Something else has changed too! Double the numbers, so 1800lbs and 10 people, and you still arent 18" down!
 

TPC

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Speaking of pontoons:

Wife got a $600 credit merch voucher for gear and was in the dealer & the 21’ Switch caught her eye.

She searched it and found serious discounts are appearing in Showrooms.
You Tube owners seem happy.
Worth a closer look.
 
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