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Old 20 November 2003, 11:12   #11
Country: UK - England
Town: Southampton
Boat name: Searider / War Shot
Make: Avon / Scorpion
Length: 4m +
Engine: 30hp Yam / 150hp opt
Join Date: Sep 2003
Posts: 1,846

Epoxy might not be strong enough but an adhesive like ITW Plexus methyl methacrylate may well be.

A company I used to work for sold this stuff and many boatbuilders secure their hull to deck connections and internal stiffeners with it. Will be stronger than what ever it sticks to.

Sunseeker Camargue 50 and Melges 25 hull to deck connections are made using this.

Search on the web for Plexus or ITW

Maybe an avenue worth exploring.


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Old 20 November 2003, 11:54   #12
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 2,256
Plexus is an outstanding adhesive, forms a chemical bond with the laminate, in the event of a failure it's normally the glass that lets go first. I'd still use some sort of mech fixing as well though!

You can buy it from Marine & Industrial Sealants
tel: 01692 408822

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Old 20 November 2003, 16:31   #13
Hightower's Avatar
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,829
Just a thought about fixing your console without using screws though the deck.

Might it be possible to cut a peice of marine ply the the exact size of the bottom of the console, then coat with fibreglass resin allow to dry then fix this to the hull via glue/chopped strand/whatever.

This would give you a much larger surface area for adheasion to the deck than just mounting the console by it's self.

Push the console over the now, raised plinth and screw from around the bottom of the console, you could also fibreglass inside as well for extra strength.

No holes in hull but screw heads around console bottom. The choice is yours!

Hope this helps.
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Old 21 November 2003, 01:39   #14
Country: UK - England
Boat name: Won't get Fooled Again
Make: Ribtec
Length: 6.5
Engine: Honda 130
Join Date: Mar 2002
Posts: 888

Your profile says your a Mechanical engineer, so consider these issues whilst making your analysis

Your boat is not new, you do not know if any delamination is starting to occur between the Gelcoat and the GRP (glass Reinforced plastic.

The Gelcoat is not really an integral part of the structure and has no impact resistance whatsoever ( it does look pretty however)

If you get a bit of wood and laminate that to the Gelcoat and then fasten your cosole to the wood, then isn't this just a nother way of attaching to a non structural component!

It wouldn't happen in my world ( but then I am the first to admit that my world is a strange place)
I need a little bit of Rhythym and a little bit of Blues
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Old 21 November 2003, 04:01   #15
Country: UK - England
Town: Wickford, Essex
Boat name: Seahorse V
Make: Avon Searider
Length: 4
Engine: Mercury 50HP
Join Date: Jul 2003
Posts: 57
Thanks for all your replies. It looks as though I will have to bolt it down as well. Unfortunately, I wont be able to bolt it down on the inside of the console because it has been designed to accomodate a bigger fuel tank under the console and there will not be much space to fit any type of bracket on the inside.

Wavehumper, just for your information, the original Gelcoat on the deck has been completely removed. At the moment there is just raw fiberglass there. It will not be regelcoated until the console has been fixed in place. I did this with the intention of getting as good a bond as possible for any adhesive.

I may give this Plexus a try and see how it goes. Once I give it a test on the water, if it seems a bit unstable then I can always add bolts to give it the extra strength.

But as you mentioned, there will be grab rails on it. Normally they are not used but I do not want the day to come when they are and then the console gives way.

Again, many thanks for you replies.
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Old 21 November 2003, 12:53   #16
Country: Ireland
Town: Dublin
Boat name: wizzard
Length: 7m +
Engine: 225 optimax
Join Date: Sep 2002
Posts: 835

These seats are stuck down with resin and mat with the bonds done on the inside, rock solid no problems
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