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Old 12 August 2013, 10:16   #31
lakelandterrier's Avatar
Country: UK - England
Town: Gloucester
Boat name: Lunasea
Make: Ribcraft
Length: 5m +
Engine: Suzi 140
MMSI: 232005050
Join Date: Sep 2007
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Good news that you don't have to cut the deck up to extract & repair/ renew the main tank

Just a thought & I expect you're way ahead of me - but is it worth checking an top of the filler piper problem, that there has been no damage to the tank itself from its moving around? It would be a right PITA to repair the filler pipe, the find there's still a leak somewhere.

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Old 12 August 2013, 10:58   #32
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Ian M's Avatar
Country: UK - England
Town: New Milton
Boat name: Jianna
Make: Osprey
Length: 6m +
Engine: 200 E-TEC
MMSI: 235076954
Join Date: Sep 2004
Posts: 1,903
Well, at least there is some good (ish) news!
I hope the repair is as painless as it now appears to be.
Good luck

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Old 12 August 2013, 11:11   #33
butty's Avatar
Country: UK - England
Town: southampton
Make: Island RIBS / custom
Length: 7m +
Engine: inboard diesel
Join Date: Jul 2003
Posts: 238
Nasher, i have cut the deck of an Ocean RIB to replace the S/steel fuel tank with a plastic one a few years back.

I can answer some of your questions regarding how the tank was held down in that boat, it was in a void between the 2 longitudinals and then held front and aft by plywood bonded between. the gap around the edge was fill with expanding foam.

this boat i owed at the time had a similar issue to yours, due to the foam being the only form of stability for the tank, the tank moved over the years as the foam degraded, from fuel spillage and water ingress.

self expanding foam absorbs water better than a sponge, and fuel makes it compress a little more easily it would appear.....

so i removed the tank and then set about removing all the foam which was quite heavy due to all the liquid it was retaining!!!!

just thought i would share with you my experience of this.... good luck and if you want any more info pm me...
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Old 13 August 2013, 05:49   #34
Nasher's Avatar
Country: Other
Town: Principalite d'Chaos
Boat name: The Nashers Revenge!
Make: Ocean & Bombard
Length: 6m +
Engine: Suzi DT200EFI, DT9.9
MMSI: "Mmmmm SI" she said!
Join Date: Jan 2004
Posts: 4,141
Thanks guys

Bedajim Ė PM on the way.

Butty Ė Nice to know Iím not the only one.
Iíve not seen Malcolm or Colin recently, the guys from Windsor Brothers who made Ocean RIBs, but will mention it when I see them.
Iíll also send a quick PM up to Razorbill in case heís not seen this so he can check the filler neck on his 6.5.

I really donít want to cut the deck out etc just to dig out the old foam, so will leave it in place and add some more at strategic points.
Obviously the only bit Iíll struggle with is getting it underneath, so will have to assume whatís there is OK but just a bit compressed.
Iíll look out for a closed cell version which wonít hold the water.

So, to the RIB builders on here, assuming unlike me youíre doing it with a new boat that doesnít have the deck in yet, whatís the best method/stuff to secure an under-deck, built in tank?


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