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  wet hull foam...what to do?

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Author Topic:   wet hull foam...what to do?
bp238 posted 12-15-2000 12:55 PM ET (US)   Profile for bp238   Send Email to bp238  
I have a 79 20 foot outrage that was moored with the plug out for many a summer (reason for plug out...too lazy to install reliable bilge pump). The foam is wet. The bilge pump was monuted with screws (dumb) and water seeps out the holes. There is also slight delamination in the floor near the small bilge area. I'm not sure how far the wetness goes but was wondering if there is a way to drain what's there. I'm good with repairs but have no idea how this hull looks in a cutaway diagram (which would help lots if you know where I can get one) so I'm working in the dark. Any help would be appreciated.
triblet posted 12-16-2000 10:36 AM ET (US)     Profile for triblet  Send Email to triblet     
There's lot's of discussion of this in the
archives, probably in this section, and some
creative ways of fixing it.

Chuck Tribolet

bp238 posted 12-17-2000 05:43 PM ET (US)     Profile for bp238  Send Email to bp238     
Thanks triblet, I found tons of good stuff. I think I just need to drill a hole under the bilge area and hook up the shop vac. I think what I'll do is drill a hole and screw in a fitting with threads on one side and hose fitting on the other, run the hose to a five gallon bucket with an air tight lid and hook my shop vac to the bucket via whatever air tight fitting I can come up with. I have a question about the stringers in a whaler of this size (20ft). Mainly, does it have any? If I drill the one hole under the bilge, will that get any water that is in the back of the boat? Or will I need to drill more. If anyone has had one of these down to the bare bones or has actually seen them being built or a diagram of one I could sure use some advice. Thanks in advance for any help.
lhg posted 12-17-2000 05:59 PM ET (US)     Profile for lhg    
Your hull has no stringers at all. It is simply two fiberglass skins bonded to the injected foam filler. There are some places, however, where typically 1/2" marine plywood is bonded under the interior skin for screw mounting of interior components and accessories. The motor mounting area of the transom is solid plywood under the fiberglass skin.
bp238 posted 12-18-2000 03:04 PM ET (US)     Profile for bp238  Send Email to bp238     
thanks lhg. One hole should do it...
bp238 posted 12-18-2000 03:31 PM ET (US)     Profile for bp238  Send Email to bp238     
Well, I drilled the hole and no water came out. I stuck a toothpick up in the foam and it came out wet:( Since the holes for mounting the bilge pump were on the top, I guess the water that intruded was sitting on top of the foam and has migrated its way down through. The only thing confusing here is that BW foam is supposed to be closed cell-non absorbing. At least thats what the literature says for a new one. I guess I need to try "sucking" the water from the top. From the looks of it, I don't think it will ever be completely dry...
bigz posted 12-18-2000 03:56 PM ET (US)     Profile for bigz    
Not sure if you found this post but if you didn't might give you some insight about your current problem Tom

bp238 posted 12-19-2000 03:14 PM ET (US)     Profile for bp238  Send Email to bp238     
Thanks Bigz, great thread! I think my best solution is to pull the vacuum on the bottom hole then cut a 1 inch hole in the floor (argh!) in the middle of the delaminated area (as apposed to a bunch of smaller holes), inject the epoxy and weight it down to cure. The delamination is only about a 12x20 inch area in the floor near the bilge compartment. It is the part of the floor which has the non-skid surface to it and I think a 1 inch hole covered by a "cap" of some sort would be a better alternative than trying to fix a checkerboard pattern of smaller holes in this non-skid surface. Thanks for the input so far and if anyone sees a better solution, please feel free to speak out.

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