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Old 01-23-2017, 12:39 PM   #1
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Ok Guys/Gals,

Just bought a 2004 Maxum 2900Se. Was in engine compartment the other day working on the batteries and I noticed I could see daylight in the bottom of the boat. To me that was very concerning, because why should I see outside the boat through the bottom of it? Sounds like a great place for water to get in and sink the boat. I crawled under the boat where I saw the daylight and there is like a metal cap attached there with openings in it. Like a vent cover. Can someone explain what I am looking at and why it is open??
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Old 01-23-2017, 12:57 PM   #2
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Welcome aboard 'bobgaudette'!!!

It's difficult to say without a picture. I suspect you're seeing the airvent. I suspect there is a similar opening with a hose attached to a blower. The blower would discharge air out from the engine compartment. You find find a hose that goes from the lower part of the bilge to the blower, then a discharge host to the vent. The vent you see light coming through would be the one to allow air in to feed the combustion engine.
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Old 01-23-2017, 01:01 PM   #3
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If it to allow air in for the engine, why is it below the water line. It is almost smack in the middle of the bottom of the boat.
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Old 01-23-2017, 01:03 PM   #4
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A picture would be helpful.
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Old 01-23-2017, 01:06 PM   #5
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I agree, and thanks for helping. At work today. I will take one tomorrow when I get home and post it.
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Old 01-24-2017, 01:29 AM   #6
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I've got a 2005 with twins. Grab a few pics and I'll compare with mine. There are two water valve intakes for the cooling systems and a transducer for depth that have the grates/ strainers in the area your talking about, but those are self contained and don't allow light in.
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Old 01-24-2017, 01:10 PM   #7
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Quote:
Originally Posted by bobgaudette View Post
Ok Guys/Gals,

...... there is like a metal cap attached there with openings in it. Like a vent cover.
Is it made of bronze? It almost sounds like a seacock, or a throughhull strainer for an A/C pickup with a screw-on ball valve where the ball valve is missing. An I/O or OB would intake water through through the lower unit. An inboard, generator or A/C would intake through a through hull with a seacock.

Does your boat have a generator, Inboard engines or Air Conditioning? I would assume it is the pickup for one of these and the hose and/or ball valve is missing.
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Old 01-24-2017, 10:49 PM   #8
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Ok you should never see daylight coming from below the waterline. If there is light there will be water and that is never a good thing. I suggest you investigate this a lot closer. the only holes in the hull should be the water inlets for the head and air conditioning and cooling water for engines. Is there a hose on the inside connected? Like others have mentioned if the boat is out of the water take some pics of the outside and the inside.
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Old 01-24-2017, 10:52 PM   #9
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Sounds like a water inlet and the vent looking screen is for large debris so as not to clog.
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Old 01-24-2017, 11:05 PM   #10
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We're not talking about the drain plug, are we? On the transom at the back, center of the boat?
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