Hunter 27 mast step rebuild...

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emkay

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May 6, 2008
70
Hunter 27 Buffalo
Instead of one post a week or so with a mishmash of projects, I'll just do one per project and keep updating them. Today I made a huge leap, and now I gotta figure out how to fix it.

So I have a huge hole in my rudder, and a huge hole in my deck. I can't wait to be done with it. These pictures are only the start! After I cut this section out I couldn't find dry core, so I borrowed the brokers moisture meter and checked it, and the meter shows a huge section is wet, like 3'x4'. But IT LIES! Ok it doesn't lie, I just don't know how to use it properly. So I started cutting, and only cut into dry core. Now I'm REALLY pissed. So I pull up maine sail's instructions again, and go at it with the moisture meter again and only cut what shows REALLY wet.

So long story short I cut out a section about 1' wide and 3' long. All of it on areas with non-skid so it's not that bad. I did not take pictures of the final part because I was too dirty and annoyed to go down to my van and get my camera again. I'll post pics of that tomorrow.

On a good note, I went at the rest of the deck and it's dry everywhere else. Well, some areas show "moist" but after what I went through before, "moist" really means "dry"

This is the first layer, wet 1/2" plywood...


Wet plywood removed, this is the actual deck. Why Hunter made the deck two layers here? I dunno...


And this is what's underneath. Balsa...Under the mast. :shrug Why?!?



If they would have just glassed in some more plywood sealed off from the rest of the core, there wouldn't be a problem! Yeah the plywood would still be wet, but it would be a much easier fix. Now I gotta recore, and reskin 3 square feet of deck.

Here are the specifics that I found for the curious.
Top skin on mast step: 1/4-1/3" thick glass
Step Core: a piece of 1/2" plywood, rectangular, roughly the shape of the step
Deck skin: 1/4-1/3" except under the step, a little thinner 3-16" or so
Inner skin: about 1/4" glass
Cabin liner: 1/8" to 3/16" glass

Most of the deck is mat or chopper gun, very uneven thickness. The bottom layer seems to be mostly cloth or roving, that's probably where the strenght is, the top layer must be just for stiffness.
 

Manny

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Oct 5, 2006
983
Hunter 82? 37 Cutter Wherever the wind takes me
Hey Emkay, I undertook the same project a few years ago. Here's a couple of pics and a description on this thread: http://forums.hunter.sailboatowners.com/showthread.php?t=106509

It's interesting what you found, as it sounds a little different than mine. If memory serves mine was all balsa, there was no plywood to be found. If I understand what you posted, are you saying there was another layer of glass inside the core? Mine didn't have anything like that. Mine was fiberglass deck/balsa/fiberglass liner. I just built mine back up with fiberglass.
Judging by the bolt holes, it looks like your step was only held on by three bolts? Mine only had three...

Good luck and definitely check out the link for the thread, you may find it helpful.

Manny
 

emkay

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May 6, 2008
70
Hunter 27 Buffalo
Manny, you cut out the entire step, did you cut apart the raised part? Inside the raised part is plywood. Probably soaked plywood. Thanks for the link.
 
Oct 12, 2009
63
beneteau 321 digby
fun fun fun

I did the same thing to my 30 after fall haul out only I cut a line to follow the the non skid line and removed the complete raised step area.I removed all balsa from the cabiin top cleaned it with acetone and relaid balsa in resin .In the meantime i took the step area home removed the fiberglass layer that separates the plywood from the balsa and i put new plwood in resin using a jackpost to hold it down while curing this put my step back in shape as it was depressed from the pressure of the mast.then i laid down a thick coat of resin and reset the step area on the deck and with a little sanding its not at all noticeable.Also before reattaching the aluminum step I drilled the holes oversized and poured in resin and after curing I redrilled the holes isolating the balsa core from any future water infiltration,fun project!good luck!
 

emkay

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May 6, 2008
70
Hunter 27 Buffalo
I should have taken it out like you guys did, it would have been much easier to put back together.
 

Manny

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Oct 5, 2006
983
Hunter 82? 37 Cutter Wherever the wind takes me
Manny, you cut out the entire step, did you cut apart the raised part? Inside the raised part is plywood. Probably soaked plywood. Thanks for the link.
No I didn't cut apart the raised part... I had every reason to believe that it was solid fiberglass. First off, when I removed it, it didn't seem thick enough to be cored. Also there were a bunch of holes in it, and I drilled a few more to let excess epoxy out when replacing it. I should have been able to see some core through the holes or at least notice wood come up when drilling the new holes.

Manny
 
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