Silt in the hull from flood ​d​a​m​age, how to remove?

clarky711

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Apr 8, 2008
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I live in the Catskill Mountains of upstate New York, and last August Hurricane Irene swept away my 1995 Key West 1900CC Sportsman (and trailer) about a mile downstream on what is usually a tiny creek that you can hop across and not even get wet. Neighbors tell me that in the height of the flood, the entire boat was submerged and water was flowing over it like it was a rock. I've finally got the boat back as the motor needed to be rebuilt (silt in the block, injectors, etc) and it's running good now. Remarkably, the hull was for the most part saved due to the fact that it remained on the trailer (which was destroyed). Structurally the hull is sound, but there is some cosmetic damage to the fiberglass on the rub rails which I plan on repairing. See attached pictures.

My biggest problem is that from the boat being on it's port side in the trees, all of the silt from the flood has settled within the hull and there is a lot of it based by how bad the boat list to the port side. The silt is packed in there hard and most of the drain tubes are completely sealed up with this silt. It basically was in a liquid form and has solidified and is everyone inside the hull on the port half. When in the water the port side is about 6" lower than the starboard side. My biggest problem is gaining access inside the hull so I can flush it properly. The gunnel rod holders are pretty much glued to the hull with the foam, and there is no way that I'll get them off without breaking it.

I removed the rod holders on the top of the gunnel, and from the rear holder I was able to get good access to the hull where I was able to get a small percentage of the silt out. The front rod holder is completely surrounded by foam so it doesn't help me much.

I removed the 6" hatch on the floor of the center console to reveal the sending unit on the top of the gas tank. There is silt there too, but when I tried to flush that out it just filled up with water and didn't drain properly. I imagine that most of drain tubes are completely filled up with silt as well. I'm planning on running a wire snake thru them tomorrow to try and brake it up. I've been using a garden hose, but I just got a pressure washer and will try that as well. If I have to I'll remove the center console to get at the floor panel, but that will be a last resort as that is a ton of work.

I may try removing the rub rail and drilling 3/4" holes and try to drain the hull that way (which will require putting the boat on top of old tires on the ground and then tipping the boat on it's port side again). If I have to I will install round hatches in the gunnels to gain access, but I'm worried that I will just get foam. I really don't want to cut open the floor.

Please let me know if you have any suggestions as I'd really like to be able to get the majority (if not all) of the silt out so I can use the boat again. Also, if you know where I can find any schematic diagrams of the hull, that might be helpful. Thanks in advance for your time and any help you may be able to offer.

Mike
 

Yacht Dr.

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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

Your pictures didnt post up.

I would just keep trying the backflush through the drains ( dunno if I would use a pressure washer though.. ).

It might take a while..

Try them pics again :) .

YD.
 

Bob_VT

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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

The first thought that come to my mind is a good size wet/dry shop vac. I would try to get out as much as I could and then ad YG said backflush it and do it again.....and again and again...... it will be a tedious process.

Yes be careful with a pressure washer since it can tear up flotation foam and soak it......
 

clarky711

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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

Here are the pics, thanks for the heads up on the pressure washer. I'll stick with the hose for now...

Picture1.jpgPicture2.jpgPicture3.jpg
 

jbcurt00

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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

If you think you've gotten as much (all(?)) silt as you'll ever get out, out, you may want to try & get a rough estimate of how much your boat 'should' weigh. Then take it somewhere (I've been able to take mine to a local recycling yard & drive on to their scales free, and get a certified weigh slip for the DMV, when it isn't busy, twice in 30min 1 morning) and get an estimate of it's current weight to compare to the original manufacturers spec weight.

IE:
my empty trailer = 500lbs
2 junk boats, 1 on that trailer, the other cut up & thrown inside the 1st = 4700lbs on the landfill scale
w/out motors, tanks or gear, the boats weighed a combined dry weight (from here) = 2000lbs

When I took them to the dump, below deck, in the flotation foam, I had a combined total of almost 2200lbs of trapped water weight in 2 boats.:facepalm: Carp, and these were not foam filled construction type boats (like a boston whaler). I had also stripped everything I could possibly take of: Windshields, trim, rubrail, stern ladders, bow & stern rails, steering wheel & cabling, throttle control box & cables, dash panels/trim/gauges, etc......

I hope that the boat's port list is 100% attributed to the silt build up. And your out using it before the end of the season, this year.
 

Bob_VT

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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

You might be lucky...... appears to be a faily modern boat and the foam may not have been subjected to the water that long.

Your photos made my heart drop :( I feel your pain and know the damage done up here in VT from TS Irene.

I have to ask....... insurance on the boat? Was it in the water to start or in your yard?

Sure would like to see a recent picture since I know when those were taken.
 

jbcurt00

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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

It still makes me ill, just thinking about those pix & I didn't even open them:facepalm:

Recent pix would be great!
 

Yacht Dr.

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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

http://www.noaanews.noaa.gov/stories/images/andrew-comp0822-2592.jpg

Andrew was a bad bad bad the worst storm ever .. I was just north of the eye in FL. ( coconut grove ). To see 60 footers with 3 pilons sticking out of the deck is heartbreakning. ( not to mention the freezer trucks at 3am going north )

Pull that port side seat base and see what you can reach. Anything on the port side thats screwed in take it off and inspect.

At least the looters didnt take your power off there.

YD.
 

clarky711

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Apr 8, 2008
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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

Here are some pics from this past week with her on a new (used) trailer.

photo11.jpgphoto10.jpgphoto7.jpg

Going back to the flood, the boat was in my yard before it was swept away. Worst part was I was there and couldn't do anything to save it, I never thought I had to chain it to a tree. It lasted about an hour until the neighbors 1 car garage was washed away and then it sailed off downstream about a mile. To be honest, I still can't believe how little damage occurred to the hull. As for insurance, I thought it would be covered under my homeownder's policy, but because I didn't have flood insurance (I do not live in a flood plain) nothing was covered. But, it could have been worse and we were safe.

Anyway, I'm going to take the console out. A couple of questions. Right now all I can see under the console is an 8" round access hatch. When I remove the console, will there be a floor panel that will lift out or will I have to cut the decking open? Also, I have to remove the pluming for my livewell, any tricks to doing that without breaking the drain/inlet fittings?

Thanks...

Mike
 

clarky711

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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

Couple more pics of the console...

photo5.JPGphoto2.JPGphoto1.JPG
 

Yacht Dr.

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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

90% chance there is NO floor panel under the console.

Did you try to remove that seat base ?

YD.
 

jbcurt00

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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

View attachment 161503
attachment.php


Anyway, I'm going to take the console out. A couple of questions. Right now all I can see under the console is an 8" round access hatch. When I remove the console, will there be a floor panel that will lift out or will I have to cut the decking open? Also, I have to remove the pluming for my livewell, any tricks to doing that without breaking the drain/inlet fittings? Thanks...Mike

90% chance there is NO floor panel under the console. Did you try to remove that seat base? YD.

Is it common for the floor panel to come out w/ the console on a CC or this CC?:confused:?

I ask as much for my info as much for Clarky711's
 

clarky711

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Apr 8, 2008
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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

90% chance there is NO floor panel under the console.

Did you try to remove that seat base ?

YD.

I can see thru the seat tube that there is no access hole to below the deck under the seat base. If only that would be so much easier. I'm waiting to hear back from Key West regarding the floor panel - hoping that there is something there before I start taking the console out. Thanks!
 

clarky711

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Apr 8, 2008
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Re: Silt in the hull from flood ​d​a​m​age, how to remove?

So I have the boat off the trailer (http://forums.iboats.com/showthread.php?t=527592 - worked great!), and the rub rail in now removed. Next I'm going to mark and drill 3/4" holes (underneath where the rub rail goes) into the hull so I can tip the boat on it’s side and flush again. Hopefully this will help in getting most of the silt out of the hull. When I’m done with this, I’m going to take it down to the river and see how she floats. If it’s still bad then I’ll look into taking off the console and access/flush below thru a cut out in the floor.

Just before I took the boat off the trailer, I had the boat (empty fuel tank)/motor/trailer weighed – 3160lbs. Minus 540lbs for the trailer, and about 400 lbs for the motor (I would have thought that the 2006 Merc 115 EFI 4 Stroke would have been heavier) and you have 2200lbs for the boat. Key West says that the hull (dry) should be around 1600lbs, so that puts me about 600lbs over. I’m not sure how much to guess what the extras in the boat weight (electronics, pumps, dual batteries, etc) but lets say it’s around 150lbs. So now I’m at 450lbs over the standard (new) 1600lbs. Now my hull is from 1995, so how much of that could be from water or do you think most of that is silt? How accurate do you think that math is? The float test will tell the most accurately, but I’m interested in hearing your thoughts as well.

Thanks, pics to come…

MC
 
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clarky711

Seaman
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Apr 8, 2008
Messages
72
Re: Silt in the hull from flood ​d​a​m​age, how to remove?

pics from today's work. Drilled five 3/4" holes under the rub rail, tiled, flushed and drained. Hard to tell how much came out. Going to weight it again and run it down to the river this week to test. Here's some pics...

Picture4.jpg
Picture3.jpg
 
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