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Chia

can i drill thru the transom?

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Chia

i need more holes in the boat for pumps. There is very little room to drill thru the bottom anymore and was thinking of drilling thru the transom (under the swim platform but the hole would still be at or near the bottom of the bin on the vlx.

is this a good idea or a bad idea?

i know i would not be able to fill will under way but that would not be a problem for me.

thanks

 

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minnmarker

Structurally that should be ok but you may have trouble getting low enough with the floor limiting placement.  I would avoid the center as you might suck exhaust gas there.

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Marksa1458

Could you do something with one of the drain plugs? Maybe make a fitting with a valve or something?

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Nitrousbird

I wouldn't.  I would go bigger on an existing fitting and split it.  Make sure you are utilizing the bottom drain plug as well.

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MLA
8 hours ago, Chia said:

i need more holes in the boat for pumps. There is very little room to drill thru the bottom anymore and was thinking of drilling thru the transom (under the swim platform but the hole would still be at or near the bottom of the bin on the vlx.

is this a good idea or a bad idea?

i know i would not be able to fill will under way but that would not be a problem for me.

thanks

 

Why not just T an existing ballast through hull? I do it all the time with absolutely zero issue. I do it with both aerator and impeller pumps. However, I dont suggest mixing as in aerator off one side and impeller off the other. 

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boardjnky4

If you do that on the transom, you wont be able to fill ballast while underway on plane.

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Chia
8 hours ago, MLA said:

Why not just T an existing ballast through hull? I do it all the time with absolutely zero issue. I do it with both aerator and impeller pumps. However, I dont suggest mixing as in aerator off one side and impeller off the other. 

If I use a "t" I would have to use valves to isolate the pump I want to use, otherwise the pump will draw from the path of least resistance, wouldn't it?

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MLA
2 hours ago, Chia said:

If I use a "t" I would have to use valves to isolate the pump I want to use, otherwise the pump will draw from the path of least resistance, wouldn't it?

Nope, no need for any more than the one emergency shutoff ball valve. The path of least resistance is the water pressure created by hull displacement.   Just dont pair an impeller pump up with an aerator. We have seen issues with the impeller pump drawing from the aerator side if the aerator is off. However, no issues with two aerators or two impellers sharing a single thru-hull.  

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Chia

Thanks, that is exactly what I will do

2 hours ago, MLA said:

Nope, no need for any more than the one emergency shutoff ball valve. The path of least resistance is the water pressure created by hull displacement.   Just dont pair an impeller pump up with an aerator. We have seen issues with the impeller pump drawing from the aerator side if the aerator is off. However, no issues with two aerators or two impellers sharing a single thru-hull.  

Thanks, that is exactly what I will do

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braindamage
22 hours ago, Chia said:

 There is very little room to drill thru the bottom anymore

Seriously...you have that many holes in the bottom of your boat???

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Chia
2 hours ago, braindamage said:

Seriously...you have that many holes in the bottom of your boat???

Lol, no, just a lack of working room around the engine compartment.

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