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Old 03-10-2014, 21:15   #1
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2006 Hunter 36

Hoping for some advice / history if anyone can provide it. Just purchased the subject vessel which passed survey with flying colors. On this particular version, the boom traveler is fastened to the top of a large stainless steel gantry which is over the cockpit. Today, as I was washing her down, I noticed some gel coat cracking and discoloration at the port forward base of this structure. Just forward of this cracking is the GPS antenna, installed by the factory. I am concerned that the cracking may be the result of water intrusion from the cut made to install the GPS antenna and that the underlayment supporting the gantry may be suffering.

Is anyone aware of this problem on Hunter's of this era? If, so, how much trouble am I in here? Thanks in advance.
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Old 04-10-2014, 01:09   #2
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Re: 2006 Hunter 36

Ok I'm stumped what's a gantry?
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Old 04-10-2014, 08:26   #3
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Re: 2006 Hunter 36

My apologies, not sure what to call the large stainless steel arch over the cockpit. Maybe I'll just call it a stainless steel arch?
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Old 04-10-2014, 08:30   #4
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Re: 2006 Hunter 36

I call it a traveller arch. And if be surprised if there is any core material to saturate beneath the attachment points.


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Old 04-10-2014, 08:33   #5
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Re: 2006 Hunter 36

Thanks SM. Any idea what might be causing the cracking / discoloration? The color is a very mild brown...but not rust-like. Will try to get a photo today and post it.
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Old 04-10-2014, 10:30   #6
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2006 Hunter 36

Panamax, ok that helps. A friend has the same boat a year or two newer. I had planned to look and see if he had something similar to give you something to compare. I don't recall seeing an arch but will take a look tomorrow.

Another idea is the hunter forum on the sister site to this one sailboatowners.com


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ETA if you can take a photo it may help folks help you figure out what's going on.
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Old 04-10-2014, 10:39   #7
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Re: 2006 Hunter 36

Got a pic? is the arch triangulated or just a simple arch? a lot of leverage there for sure, stresses will be high. Can you see inside the attachment? Does it look like they reinforced the area? Is it cored there? It's amazing what some boat builders will do...
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Old 04-10-2014, 10:59   #8
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Re: 2006 Hunter 36

Quote:
Originally Posted by Panamax. View Post
Just purchased the subject vessel which passed survey with flying colors.
So....no mention of your concerns on that survey? Was the survey done by the seller/brokerage surveyor? Maybe you should ask him if it's a problem?

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Old 04-10-2014, 11:28   #9
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Re: 2006 Hunter 36

So the arch it self has spider cracks in it. Pics would help.

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Old 04-10-2014, 11:34   #10
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Re: 2006 Hunter 36

If you can get to where the arch and the antenna are through bolted to the underside of the glass check to see if there is a backing plate. Crazing of the glass would indicate lots of stress and where there is movement. There might be a need to install a backing plate to spread the load.

Good luck in sorting it out and let us know what you find.
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Old 05-10-2014, 09:32   #11
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Re: 2006 Hunter 36

Click image for larger version

Name:	ImageUploadedByCruisers Sailing Forum1412523095.711014.jpg
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ID:	89267. This shows what I am speaking of. I did check under and there is no backing plate.
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Old 05-10-2014, 09:34   #12
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2006 Hunter 36

Those look like stress cracks to me. What does that line do and does it push outwardly on the fitting? If so a block would solve this issue or running the line on the opposite side. What is the metal bar that looks like a stanchion?
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Old 05-10-2014, 09:38   #13
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Re: 2006 Hunter 36

The line is the jib sheet and there is no stress against the structure. How would I be able to tell if the attachment point is cored? Looked under it and just see fiberglass.

BTW, contacting the surveyor is a great idea. Thanks.
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Old 05-10-2014, 09:49   #14
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Re: 2006 Hunter 36

Really the only way to tell if it's cored is to pull a fastener and look I'm the hole.


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Old 05-10-2014, 09:51   #15
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Re: 2006 Hunter 36

Hunter use a aluminium backing plate glased to the deck, not a good idea but at least they use a backing plate, is hard to see it unless you dive under the deck spot in question and see it with a flash light...the cracks are maybe a combination of thin layup in this arch área or the backing plate corroded to the extreme...

Minute 1.58 showing the glased alu backing plates....
https://www.youtube.com/watch?featur...&v=hcJbrcFwadA
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