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Old 01-29-2013, 05:25 PM   #1
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Flying Bridge disassembly- experience anyone?

Hello fellow trawler owners!! my first time here. dont know how I missed this site before...probably refinishing teak or changing 7 various oil reservoirs or washing and cleaning or...TRYING TO STOP LEAKS! I will be removing the upper deck and glassing it over this year but now I have determined there is a leak problem under the band of teak that girds the flying bridge cowling around the front. I have removed the plugs and screws and tried to cut the sealant still binding the board to the fiberglass but it wont move. Has anyone had experience removing this board before? What did you use to cut the sealant or bedding goop? I was not very successful doing this but I am trying to avoid damage. Is the board flush at the bottom where it meets the fg or is it possible it is "sunk"1/2" or so into the fb beneath the board?
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Old 01-29-2013, 05:53 PM   #2
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Greetings,
Welcome aboard. If you can get one end of the band free of the house you will be able to tell it's thickness. Depending on what "goop" is holding it on, you may try one of the caulk softener/removers used for that 5200 stuff (Haven't got a clue what it's called but if it dissolves 5200, it should work on anything). Just get a small crevice started at the top of the band and pour it in. Wait, pour some more...
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Old 01-29-2013, 05:54 PM   #3
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Is there an "Owners Manual" for the boat? My IG Manual has a diagram with text of the attachment method.
My boat had a leak at the attachment line under the molding covering the joint. Repair involved sacrificing the moulding to remove it, resealing the joint with fiberglass and epoxy,and new molding. Fresh rain water forced into the defect by wind on the bow is a recipe for rot and the sooner you get in there the better.
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Old 01-29-2013, 07:34 PM   #4
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no owners manual on construction and I have not been able to find any on the www. are you able to post a pic of the attachment method? I hate to take a saw or bar to it but thats the point I am at...sucker wont budge...
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Old 01-29-2013, 07:38 PM   #5
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I removed mine.....screws inside the bridge and out...many times there were screws holding the wood trim on and some more screws buried under the goo that screw the bridge to blocks under the bridge fairing.
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Old 01-29-2013, 07:40 PM   #6
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mine is a 1977. Brucek yours looks similar and there are many out there that look alike in that respect because of their common Taiwan ancestry...pardon if yours is not. - the board on mine measures 4.5" on the outside but the glassed in bulge it is attached to on the inside on the cowling is 5.5". even allowing for 1/4" fg it leaves 1/2' unaccounted for . thats why I ask if it could be bedded into a recess or??where it meets bottom of board to outside windshield overhang...
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Old 01-29-2013, 08:24 PM   #7
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Greetings,
Ah, the plot thickens...Mr. T. It may be that the bulge on the inside is necessary to give the screws coming from the outside (under those bungs you removed) something to bed into unless I totally misunderstand what you are describing.
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Old 01-29-2013, 08:45 PM   #8
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Additional greetings,
I removed some 4' of 1/4 round molding around a hatch last summer. Like yourself, I REALLY wanted to save that molding. Some Nimrod had used the goop from hell to "bed" the molding. I took a thin 1" putty knife, heated it up dull red hot with a propane torch and quickly jammed it into the minute gap between the molding and the FG deck thereby burning the goop. After I got about 2" burned out, I very carefully jammed a small flat screwdriver between the molding and the deck and created a small gap which I was able to increase by moving the screwdriver along as I did further burns. Took me 2 (easy) days but I saved the molding.
A few things to note: Try not to breath the combustion products. It ruins the palette for the single malt. Do a burn and wait for a few minutes. Even though the thermal mass of the putty knife blade is small, if you try to proceed too quickly, you're going to heat up the FG by too frequent applications of the hot blade and potentially cause damage. Keep careful but firm pressure on the band by judicious placement of your screwdriver/wedges.
The ox is slow but the earth is patient
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Old 01-29-2013, 08:49 PM   #9
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Tangler,
I will try to scan and post from the Manual, when the IT hotshot gets home.
The brief text says you remove the molding. The shipwrights cut mine in sections, removing pieces until the whole of the joining defect was exposed to repair.The shipwright milled a new molding out of teak. And we found mold, of the other kind.
Surprisingly,the IG has no Taiwan origin, they were built in mainland China, and fitted out and finished in Hong Kong. Harvey Halvorsen is credited with the design.
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Old 01-29-2013, 09:21 PM   #10
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thats exactly what it is - I guess that does not indicate the width of the board nessesarily I found another forum that shows a GB repair of the same joint but that boat did not have this wide board. it showed the cowling as just butting against the overhang. I thought it would be moulded around the overhang in one piece to avoid leaks but as per the GB,...perhaps not. and it was a terrible join...huge irregular gaps...I have not been able to see mine yet. any ideas yet on how to detach this piece? Magic tools?
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Old 01-29-2013, 09:28 PM   #11
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the burning thing sounds interesting but the problem is with the scraper...which of course I have tried...scrapers are too short to reach the bottom of the back of the board when I drive it down there with a hammer...I need a blade that is 6" and able to take a hammering...you would be surprised how hard that is to find...thats why I ask about tool ideas...thanks for all the input guys...keep it coming..
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Old 01-29-2013, 09:43 PM   #12
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You could also try a heat gun to loosen the bedding/adhesive.
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Old 01-29-2013, 09:46 PM   #13
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Quote:
Originally Posted by RT Firefly View Post
Greetings,
Welcome aboard. If you can get one end of the band free of the house you will be able to tell it's thickness. Depending on what "goop" is holding it on, you may try one of the caulk softener/removers used for that 5200 stuff (Haven't got a clue what it's called but if it dissolves 5200, it should work on anything). Just get a small crevice started at the top of the band and pour it in. Wait, pour some more...
DEBOND is one of them

Marine Formula by DeBond

I have used it a couple of times it does help, as FT said put it on let it sit stick a knife point into it to loosen it up and let the Debond soak in then repeat.
Steve W
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Old 01-29-2013, 10:26 PM   #14
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Steve beat me to it. Debond is what RTF was thinking of. Works pretty good.
Working a thin strong wire between the wood and fiberglass can be used to cut the bonding agent but doesn't sound like you have access to both edges of the wood.
Marin's idea might be worth a try. I've used heat to release metal fittings that were bonded to fiberglass with 5200.
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Old 01-29-2013, 11:59 PM   #15
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Tangler, a 6" blade you can hammer, how about a stonemasons cold chisel.
Here (I hope) are the 2 attachment diagrams. One is for "GPR"(?GRP) boats, the other is unspecified, but IG built in wood too. I hope you have the skills to enlarge them. If not, I could resend to an email address, or even fax them.
My suspicion is you may have to accept doing irreparable damage to the molding while removing it, but if you do it in sections by making cuts in it, you may be more successful.
It`s not hard to imagine rain driven at 40kts into the defect. You won`t have imagine it for long. My PO of 25 years knew there was a leak but could not find it. We found a lump of a fungus. Good luck with it.
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Old 01-30-2013, 05:40 AM   #16
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look here and see if anything helps...
i doubt the bedding is what has it so securely unless the bridge has been off before and got 5200ed down.

The Albin Restoration
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Old 01-30-2013, 10:49 AM   #17
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thanks so much Brucek and your techie for the diagrams..gives me valuable clues but not quite my installation - where your A - A detail shows a narrow teak strip to anchor to the fare of the cowling is where I have a 4.5" board double screwed and glued. As to the chisel it lacks the flexability of the scraper type bladeand I am concerned about damage. I have pretty much decided not to try and save the board...bad shape anyway...will be going to my favorite tool store today for more implements of destruction. Time to get serious...you guys have been great...will check out the Albin restore a little later and comment later today
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Old 01-30-2013, 04:08 PM   #18
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the albin restore is great. good job. shows me again how the gridge is mounted to the top of the cabin. I went to Canadian tire believe it or not and found a couple of good possibilities for tools...one is a lethal looking bar from stanley called fubar that looks real promising...wont get a chance to try it out until the weekend. My boat is over an hour away so I try to go just once a week. I want to get all this floor and bridge work done before spring so I guess I will be overnighting as much as I can. fortunately so far this winter the weather is intermittantly ok and I can work under tarps. cant afford a boathouse or shop to work in but that may become a factor when all the prep is done...Thanks again and hope to see y`all on the water
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Old 01-30-2013, 05:39 PM   #19
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I recently completed this project on my 38' MT DC.
Pulled the wood off with a prybar and hammer.
Then got into it with orbital sanders, coarse grit, finer grits, and went after it with West system thickened epoxy. Took quite a while to complete, but NO LEAKS!
Can send pics of the whole process if you want.
Easy process in retrospect.
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Clearwater Municipal Marina
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Old 01-30-2013, 06:03 PM   #20
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Tangler, Happy to help. The diagrams are from the IG Owners Manual, they came in pristine condition with my 1981 boat (not in pristine condition).
The inevitable violence will be hidden by repairs and the new cover strip. From various posts it seems the fwd join attachment of the flybridge is a weak point. Maybe it starts ok but suffers facing into the weather, seems unlikely so many builders get it so wrong.
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