Re: [omc-boats] How to check stringers/foam?

From: David <odin@...>
Date: Fri, 30 Jun 2006 12:34:33 -0500

Zach,
I had cut four round holes in the floor of my Sportsman - they were
about 10" in diameter - It was a lot of work chipping all the foam out,
but it worked - I injected the new foam very slowly - small amounts at a
time to limit the pressure pushing up on the floor. Once cured, I cut
the foam down in each hole about a quarter of an inch below the floor
and then poured epoxy in the hole, set the old piece back in and put a
layer of matt glass over it - the boat is back to jumping out of the
water - V6 buick in it. Sorry, No Pictures - just vivid memories! Dave

Zach Stanley wrote:

>This is a topic that has had me waking up at night screaming! I know that our boat is waterlogged. It has sat low as long as we've had it - about three years - but also lists to the starboard side. Also, the boat has been in the family since new and everyone has commented how "the boat just kept getting slower and slower" and "harder to pull a skier out", etc. Makes sense now that the boat is dragging some extra weight around.
>
>My question is... will replacing the foam using conventional methods now give the boat structure as the original injected foam did. I would love to hear comments about regained performance - or hull-flex post foam repair. Pictures of the repair process would be great. Perhaps a section on the ultimate site should be devoted to this subject with tips and photos since it is such a common problem. Someone had mentioned cutting large holes in the floor at intervals to scoop out the foam and re-fill the cavity while leaving the floor basically intact. I think I will try this if the floor itself can be saved. If that person has any pictures or further tips I would love more info. I feel very fortunate to be involved with such an informative group - thanks guys!
>Zach
>1970 Seasport 155
>Seattle, WA
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>>----- Original Message -----
>>From: "Andy Perakes" <aperakes@...>
>>To: omc-boats@...
>>Subject: Re: [omc-boats] How to check stringers/foam?
>>Date: Thu, 29 Jun 2006 20:49:12 -0400
>>
>>
>>I haven't tried this, but another thought that would be a lot less
>>destructive (if it works): Remove one of the bolts holding the seats down
>>and try sticking a pipe cleaner (the fuzzy wires used in arts & crafts) or
>>some other object that might show moisture into the foam. I'd recommend
>>trying one of the front bolts as both my rears were rusted in place and
>>ripped the lock nut out of the plywood when I repaired my seats 2 years ago
>>(both fronts came out easy). As I said, I haven't tried it yet, but its
>>quick and easy enough to be worth a try before cutting holes in your floor
>>(though that's probably the only way to be 100% sure....but then how many
>>holes do you cut and where?) Good luck!
>>
>>----- Original Message -----
>>From: "David A. Avedesian, PE, RPA" <david.avedesian@...>
>>To: <omc-boats@...>
>>Sent: Thursday, June 29, 2006 6:56 PM
>>Subject: RE: [omc-boats] How to check stringers/foam?
>>
>>
>>
>>
>>>Kenneth:
>>>
>>>I own a 1965 Sweet 16 outboard model.
>>>
>>>Generally there is never a question regarding whether you have water or
>>>
>>>
>>not.
>>
>>
>>>If you have water under the floor boards, the boat is very heavy and sits
>>>very low in the water in the stern.
>>>
>>>I believe the easiest and effective way to check is to use a hole-saw
>>>perhaps 3" to 5" in diameter and drill through the floor in the center in
>>>front of the rear combing.
>>>
>>>The floor board is about 1/2" thick and there is nothing under the center
>>>line of the boat from a structural point of view.
>>>
>>>As soon as you remove the round plug, you will know by the odor. The
>>>
>>>
>>second
>>
>>
>>>way to determine is to push your finger into the foam. If it squeezes
>>>water, than you have a problem.
>>>
>>>I have found that when it comes to water under the floor boards, you will
>>>never be sort-a-pregnant. It will either be zero or flooding.
>>>
>>>If you are dry, then mix up a small amount of epoxy (West System is what I
>>>have used) and a layer of tri-axial cloth. Tri-axial is strong in three
>>>directions and you can use one layer.
>>>
>>>This may be more information than you wanted but I have asked this
>>>
>>>
>>question
>>
>>
>>>a couple of times. If you would like more, feel free to ask.
>>>
>>>David Avedesian
>>>Silver Spring, MD
>>>Near Your Nation's Capital
>>>
>>>-----Original Message-----
>>>From: owner-omc-boats@... [mailto:owner-omc-boats@...]
>>>
>>>
>>On
>>
>>
>>>Behalf Of Kenneth Fingerlos
>>>Sent: Thursday, June 29, 2006 4:21 PM
>>>To: omc-boats@...
>>>Subject: [omc-boats] How to check stringers/foam?
>>>
>>>I've seen a lot of traffic on this list about the state of the foam and
>>>stringers underneath the floor.
>>>
>>>Does anybody have any sage advice as to how one would go about checking
>>>
>>>
>>the
>>
>>
>>>status of such things? In particular, can it be done without cutting
>>>
>>>
>>holes?
>>
>>
>>>and if one has to cut a hole, where should such be cut to maximize the
>>>benefits and minimize the problems?
>>>
>>>Thanks,
>>>
>>>Kenenth
>>>
>>>
>>>-----
>>>To get off this list send mail to omc-boats-unsubscribe@...
>>>
>>>
>>>-----
>>>To get off this list send mail to omc-boats-unsubscribe@...
>>>
>>>
>>>
>>-----
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Received on Friday, 30 June 2006

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