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Water in the bilge **UPDATE** found the leak!

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Water in the bilge **UPDATE** found the leak!

Old 06-21-2019, 06:57 PM
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Default Water in the bilge **UPDATE** found the leak!

i Have an 18í flats boat thatís has a small trickle of water coming into the bilge area. The water is coming from the the drain line that runs down the keel to drain water from the bow area. When I put the boat in the water the bilge is bone dry, but within a few minutes the water starts coming out of that drain (itís a pvc pipe). It takes a while for it to kick the bilge pump on. But it will continue to do this throughout the day. I thought it might be rain water that had gotten into the bow area, but I checked it and it was salt water.

Iíve located and checked all the through hull fittings while in the water and no issues of water coming in. There are no through hulls at or below the waterline in the bow area. Any thoughts on where the leak might be? This is a new boat so it hasnít been abused. Yes, I will be having the manufacturer take care of it, but I want to know what it is before I take it to them.
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Old 06-21-2019, 07:52 PM
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anchor locker drain?
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Old 06-21-2019, 08:30 PM
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What sort of raw water pumps do you have? Forward livewell?
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Old 06-22-2019, 02:00 AM
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Originally Posted by ncor33 View Post
What sort of raw water pumps do you have? Forward livewell?
none.
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Old 06-22-2019, 02:03 AM
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Originally Posted by cajun bill View Post
anchor locker drain?
only have a drain that takes care of the anchor and forward storage hatch, that is well above the waterline.
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Old 06-22-2019, 02:32 AM
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Leaky hatch?
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Old 06-22-2019, 06:10 AM
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Put the boat on the trailer and put some water in the bilge - see where it drips out.
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Old 06-22-2019, 06:25 AM
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if you have a livewell or saltwater wash down pump that draws water from under the water line, the low thru hull or hose clamps are usually the culprit.
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Old 06-22-2019, 10:39 AM
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Water ingress only when under way? Or at rest? Maybe some leaky seams at the rub rail allowing water in.

If salt water enters the bilge in a continuous fashion at rest, it is pretty simple. There is either a leak below the water line, or something is drawing water from outside and dumping it in the bilge. If you have nothing that pumps salt water aboard, something is leaking.

If it happens only underway, then some other mode of ingress related to the vessel in motion (change in waterline may bring other thru hulls in play, spray coming over the gunnels, spray entering at the rub rail or anchor locker, etc...)

But, it seems like a systematic inspection is in order, not much will substitute for that.
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Old 06-22-2019, 10:42 AM
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rub rail or bow eye?
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Old 06-22-2019, 04:14 PM
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Originally Posted by Bullshipper View Post
if you have a livewell or saltwater wash down pump that draws water from under the water line, the low thru hull or hose clamps are usually the culprit.
i can see all the through hull fittings in the bilge, nothing is leaking there. Itís coming from the drain tube (looks like a pvc pipe) that runs down the center of the boat along the keel from the bow area. Iíve put the boat in the water at rest with a bone dry bilge. After a few minutes water starts to trickle out from that tube drain.
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Old 06-22-2019, 04:21 PM
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Originally Posted by ncor33 View Post
Water ingress only when under way? Or at rest? Maybe some leaky seams at the rub rail allowing water in.

If salt water enters the bilge in a continuous fashion at rest, it is pretty simple. There is either a leak below the water line, or something is drawing water from outside and dumping it in the bilge. If you have nothing that pumps salt water aboard, something is leaking.

If it happens only underway, then some other mode of ingress related to the vessel in motion (change in waterline may bring other thru hulls in play, spray coming over the gunnels, spray entering at the rub rail or anchor locker, etc...)

But, it seems like a systematic inspection is in order, not much will substitute for that.
Im going to get under the boat and inspect the hull as best I can. There are 2 side drains, brass tubes that go through the hull an each side of the cockpit. There are plugs in both, and they are secure with no water coming into that area. Both of these drains are below the waterline. Iím going to cover both with gorilla tape and go to the lake and see if they are the culprits.
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Old 06-22-2019, 04:46 PM
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Originally Posted by caper View Post
Put the boat on the trailer and put some water in the bilge - see where it drips out.
I found my leak this way.

Put it it on my very dry and dusty concrete driveway. Turned off the bilge pump and filed the bilge with water.

I found the drip leak right away.
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Old 06-22-2019, 05:07 PM
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Caper , nice recommendation .
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Old 06-22-2019, 05:52 PM
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Rod holders?
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Old 06-22-2019, 06:48 PM
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Originally Posted by Tossedabout View Post
Rod holders?
none
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Old 06-22-2019, 06:49 PM
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Originally Posted by whatta life View Post
Caper , nice recommendation .
i agree, I can try that, I haves a dusty concrete drive way too
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Old 06-23-2019, 06:14 AM
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I had a bilge hatch once that leaked. Hope you find it.
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Old 06-28-2019, 09:37 PM
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After much troubleshooting, the water was coming from the 2 transom mounted underwater lights.
I spent an afternoon underneath the boat examining the hull for any breach, everything looked good. Rechecked all the through hull fittings, everything was well sealed. Filled the bilge with about 20 gallons of water while it sat on the trailer in my garage, no water coming out anywhere. Pulled boat out and hooked it up to my truck and pulled it up our steep drive way and all the water started pouring out from behind the 2 underwater lights.

I drained the rest of the water from the boat and unscrewed the lights. There was no sealant at all around the wire that goes through the hull, and no sealant in the hole itself. There was a small amount of 5200 around the wire on the inside of the transom wall, which explains why I didn’t see any water coming in at those points. Water was coming into those holes on the outer hull and flowing in between the outer hull and interior liner Slowing filling the lower bilge. I packed 5200 into the hole and around the wire, replaced the 4 screws, and then put a bead of 5200 around the entire fixture. Took the boat to the lake and the bilge remained bone dry.
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Old 06-28-2019, 10:32 PM
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Congratulations on you finding the problem!
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