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jc4 15th September 2009 03:29 PM

Quad fcs fin problem
Hi, I've just bought a new 71 quad convertible and found that one of the fcs fin screws does not engage against the fin. That is, does not tighten and continues spinning.
It looks like the hole in the side of the fin base does not have thread, so was either stripped or drilled to large.
When the board was unpacked from shipping that screw had fallen out during transport, verified by shop where it was bought.
I'd like to know how this can be repaired and if anyone else has come across this situation.
Many thanks

Ola_H 16th September 2009 01:10 AM

I have not seen this, but I only packed up and mounted four of them. This could surely be a warranty issue. But it has to be handled by the shop. I suppose it can also be fixed with a Permatex solution (look under product/product assistance/Repair Guide) so that you can start using the board right away. But I think you then need to first fins a longer screw that will act as a guide for moulding the nes threads. A don't know what kind of thread the fin bolt screw has, but a good hardware shop should be able to help you. Unfortunately, Tiesda, who know these things, is on the road.

jc4 16th September 2009 02:43 PM

Thanks for the reply Ola,
I am still waiting for a response from the shop where I bought it, and will try one of your suggestions, it's lucky we have no wind at the moment.
I hadn't seen the repair guide section and am hoping the products they mention will bond with the fin box material and not the screw.
As for a long term solution I'm hoping the shop will address this problem.


Ola_H 16th September 2009 04:11 PM

There is a special release agent supplied in the Permatex package. I think there is also a special instruction on how to go about with "through" type holed in the Permatex manual. But again, be careful to choose the right type screw for the job. And speak to the shop before doing anything to ensure this will not void a future warranty.

jc4 17th September 2009 04:21 AM

Hi Ola,
Again thanks, I'll let you know what the shop comes back with.
Would anyone at Starboard know what type and size of thread the screw is, metric or imp. It would make it easier to chase one up and upsize the hole.
I can see this problem being a future issue. If the metal screw is overtightened it will strip the thread in the plastic fin box.
This has got to have been a problem in surfing as these types of fins have been around for quite a while.
I have tried searching on surfing and repair websites etc but haven't been able to find anything as yet.


carvesalot 17th September 2009 08:36 AM

the Permatx product is this: Thread repair item # 765-1248 its use was discussed for footstrap holes that were stripped. I used this with, and don't think it worked so well, I used a different hole.
I would have something done under warranty.
The small screws will require additional care.

carvesalot 17th September 2009 10:43 AM

jc4 17th September 2009 04:38 PM

G'day carve,
Thanks for the link.
I tried Floyd's suggestion before seeing the post of inserting a sliver of rawl plug into the hole then carefully tightening the screw, it seems to tighten and engage with the fin. Not sure how it will handle the stress of sailing though, only a temporary fix for now.
As Ola suggested I won't be doing anything too elaborate until some feedback from where I purchased the board.
I'm thinking a slightly larger guage screw may be the only remedy, unless permatex or loctite bonds well with the plastic fin box.
The length of the threaded hole is approx 7mm, and the screw is about the same, so there isn't much material to bond to.

Still waiting for shop reply.


Ola_H 17th September 2009 05:37 PM

I'm not a big fan of the Permatex idea for footstraps screw, but here, since we're in fact talking about a "real thread" I would say it has a good chance of working. The main issue, as indicated by jc4 and carvesalot, will be how well it bonds to the fin box material. But after all, the fin box as a whole is glued in the board with epoxy and there is also a good irregular surface inside the hole (ie the old thread) that will increase the chances of a good bond.

I don't think a larger guage screw is a good idea. There is not enough material around the whole to support a bigger screw, I reckon.

carvesalot 20th September 2009 09:24 AM

err any update on progress ?

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