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PostPosted: Sat Nov 21, 2015 9:48 pm 
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Location: Utah
Hello all, I have a 2003 Hobie Fox, Sail No. 101. Polyester, foam core. Rock solid boat. I'm sanding down both hulls, doing repairs, and re-gel-coating both hulls.

She has been beached in the past several times, and moved on Cat-Trax without cradles once or twice. (Both not by me!)
The Cat Trax just some nice indentations in several spots on the bottom, which look fairly easy to fill.
The beaching, however, has left some more serious-looking grooves in the bottom, where the belly skin has been deformed in up to 1/4th of an inch in some places, and up to 2 feet long.

After sanding off the gel-coat, the damaged areas look roughly like this. The lighter colored streaks are the center of the rock grooves and appear to be damaged laminate. Forward is up.
Image

This is the worst groove in the bottom, before any work. Forward is to the right. Note the semi-circle spider cracks all along the gel-coat. The band across the top is the gel-coat seam - I'm sanding that off.
Image

Another view of the same crack, with light on it sideways to emphasize depth deformations. Foreward is up. Deepest part is at bottom of image, and has some visible fiberglass in the very bottom of the deepest part.
Image

After sanding, note the lighter streak of damaged fiberglass in the middle of the groove, and the semi-circular cracking. Forward is down. I believe the darker area of fiberglass along the hull seam is the part that doesn't have foam core, and the lighter area farther away from the seam has the foam core.
Image

Same groove, further aft. The wide horizontal area of unsanded gelcoat is one of the four or so Cat-Trax grooves. The deepest part of the rock groove is right next to it, showing the area cracked-through to the foam.
Image

What does everyone recommend for repairing the rock grooves that have fiberglass damage? Part of me wants to completely remove all the damaged glass and replace it with new glass, but then I think about how solid the boat as a whole is, and wonder if it would be worth trying to do that, and if I should just fill the depressions with a bit of mat glass and lots of epoxy, maybe with a bit of adhesive filler mixed in, and call it good?

Also, the lower aft corner of the port daggerboard case leaks about a gallon an hour when sailing. Both trunks have a fair amount of gelcoat cracking around them. I want to do significant reinforcement to this whole area on both hulls, and am wondering the best way to do this. This boat sails in a very shallow lake, so I expect that it will hit things several times with the daggerboards down in the future, and want the hulls reinforced enough they aren't easily damaged by it. I want to reinforce from the inside of the hull, but I cannot get to this part of the boat through the access ports. The 2 or 3 inches along the centerline of the hull does not have the foam core, while the area on both sides does. I am planning on cutting an access hole through the hull to get to it, but I hesitate to do this without considerable planning. I'm beginning to wonder if it would be better to cut the access hole right in the middle of the keel/centerline, where there is no foam core, or up on the side of the hull nearby where there is foam core? And perhaps, most importantly, how should I patch the hole after I cut it?

Also, the transoms and cross-bar beds have some spider-cracking. I am going to sand the Gel-coat down, and would like to reinforce these areas. I plan to add a bit of extra woven glass over these areas, and then fair the hull, so any added thickness from the extra layers of glass are not really noticeable, and curves gently up from the smooth surface of the hull. Does anyone have advice on this?

Lastly, there is a giant foam block in each hull, between the back of the daggerboard case and the bulklead under the rear cross-bar. One of them is in a bag, one is not. Both are loose and can flop around. What's up with the bag on one block, and should they be loose?

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2003 Hobie Fox, Hull #38, sail #101.
1981 Hobie 16, sail # 79737. 1981 Prindle 16, sail # 4544
Rear Commodore, Utah Lake Yacht Club


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PostPosted: Mon Nov 23, 2015 9:18 am 
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Looks very minor - standard polyester fiberglass and resins are needed. Sounds like you already know the process - just go for it. You can get matching Euro gelcoat from a Hobie dealer we have it in our catalog.

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PostPosted: Mon Nov 23, 2015 8:39 pm 
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Location: Utah
I'll be using West epoxy on it. I requested a catalog by mail. I can't seem to find the "Euro Gelcoat" on the internet somewhere. Is there a place online to find it?

Where do you recommend cutting the access hole to reinforce the daggerboard trunks? Centerline on the bottom or up on the flat side?

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2003 Hobie Fox, Hull #38, sail #101.
1981 Hobie 16, sail # 79737. 1981 Prindle 16, sail # 4544
Rear Commodore, Utah Lake Yacht Club


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PostPosted: Tue Nov 24, 2015 6:32 am 
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Location: Minneapolis (Apple Valley), Minnesota
I have used Express Composites http://www.expresscomposites.com/ to mix up custom colors to match existing gel coat. Luckily for me they are only about 15 miles away so I have used them for years for supplies and repair advice. If you cut an access port for your daggerboard trunk send them the section you cut out and they can mix up gel coat to match.

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2001 H18 w/SX wings & spinnaker #16740 (purchased new)
1989 H18 w/SX wings #14565 (purchased new, sold 2000)
Would buy another if Hobie would build it.


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PostPosted: Wed Nov 25, 2015 10:34 am 
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Part # F99056120 $25.00 order from any Hobie sailboat dealer - find one here: http://www.hobiecat.com/dealers/
If you install an inspection port do that between the front beam and the dagger.

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PostPosted: Sun Nov 29, 2015 6:53 pm 
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Location: Utah
I'll look it up. Thanks!

It comes with factory access ports there and in the very back of each hull. You can't reach the back corner of the daggerboard from either one.

_________________
2003 Hobie Fox, Hull #38, sail #101.
1981 Hobie 16, sail # 79737. 1981 Prindle 16, sail # 4544
Rear Commodore, Utah Lake Yacht Club


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PostPosted: Mon Jan 11, 2016 8:31 pm 
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Location: Utah
Alright Jacques Bernier, I tried to look up the Euro Gelcoat but I can't seem to find it anywhere and it's not in any catalogs. I need help getting an estimate on it, and then possibly ordering it. Looks like pretty much all the nearest hobie dealers are all about 11 hours away in Idaho and California. They're all about the same distance away and I'd rather order from one of the more serious dealers out in California, preferably one that does nothing but Hobie with a real parts department... Who do you recommend I contact?

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2003 Hobie Fox, Hull #38, sail #101.
1981 Hobie 16, sail # 79737. 1981 Prindle 16, sail # 4544
Rear Commodore, Utah Lake Yacht Club


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PostPosted: Tue Jan 12, 2016 9:26 am 
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This is not a part that any dealer would stock. You can 'call' your nearest dealer and have it drop shipped to your house - the price is $25 like I posted already, part number is F99056120
This item is in stock - you would need to just pay shipping (and a drop ship fee)
I can't give you other dealers - as they would not be able to have it drop shipped to you per our territory contracts with our dealers - they could have it shipped to their location and then forward it on - but that wouldn't be as quick as just calling a shop near you today (even if it is 11 hours) and having it drop shipped from the factory - if order by noon today it leaves today and starts on it's way to you.

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PostPosted: Tue Jan 12, 2016 11:32 am 
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Location: Utah
$25 for what volume? I've tried looking up that part number but I can't find it anywhere. Could I get it shipped to a dealer here locally if they only sell Kayaks?

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2003 Hobie Fox, Hull #38, sail #101.
1981 Hobie 16, sail # 79737. 1981 Prindle 16, sail # 4544
Rear Commodore, Utah Lake Yacht Club


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PostPosted: Tue Jan 12, 2016 11:59 am 
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Rcnesneg wrote:
$25 for what volume? I've tried looking up that part number but I can't find it anywhere. Could I get it shipped to a dealer here locally if they only sell Kayaks?


Cat parts are only sold through Sailboat dealers - sorry.
It's a small can - looks to be about a quart size

You can get any poly white gelcoat if you have a local shop (like West Marine or similar) - it might not match exactly but it's for a bottom repair so you won't see it...

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PostPosted: Wed Jan 13, 2016 8:23 pm 
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It's a bit more complicated than that. I'm spraying the whole boat except the nonskid patches on the top. There are a bunch of patches on the side from impact dents that are getting painted over, and about 5 new dents on the side I'm filling too. I'm also adding reinforcement (More glass) to the areas around the Transom and Crossbar beds. All this has to be gel coated over once I get done. Is there a good way to find out the coverage of that much gelcoat? It will be applied with a spray gun.

Thanks so much for all your help. I would be pretty lost otherwise on finding this stuff!

_________________
2003 Hobie Fox, Hull #38, sail #101.
1981 Hobie 16, sail # 79737. 1981 Prindle 16, sail # 4544
Rear Commodore, Utah Lake Yacht Club


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PostPosted: Thu Jan 14, 2016 9:13 am 
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You should just use a local supplier - you will need a lot more gelcoat - and since you're thinking to spray the entire boat - there's no reason to get ours - it doesn't need to match at that point.
Totally re-spraying gel on a hull is a huge job - and the boat will likely never look the same - I would strongly recommend 'against' doing this. Sand down area of repair and 'blend' into the factory finish - you'll never have that nice smooth finish on the hull if you try and completely re-do it.

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Jacques Bernier
http://www.hobiecat.com/
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PostPosted: Thu Jan 14, 2016 5:17 pm 
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Location: Utah
Update on the Daggerboard Reinforcement. Cut the access hole on the port side today and got a good look inside. The boat is a lot thinner than I expected, and incredibly light.

Image

The leaking area(Back corner of daggerboard truck) actually looks pretty good. Doesn't change the plan on reinforcing it though.
Image

Looking forward, just infront of the forward crossbar. Upper half of hull.
Image

Looking Aft, from access port. Is this foam block supposed to be secured somewhere?
Image

_________________
2003 Hobie Fox, Hull #38, sail #101.
1981 Hobie 16, sail # 79737. 1981 Prindle 16, sail # 4544
Rear Commodore, Utah Lake Yacht Club


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PostPosted: Fri Jan 15, 2016 2:08 pm 
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Foam blocks are just in the hull 'loose' (in the US we bag them first) - but EU just leaves them in without a bag - so they shed a little as you can see when draining the hull - you'll sometimes find little white foam pellets, I wish they had bagged them like we do - they don't make a mess then.

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Jacques Bernier
http://www.hobiecat.com/
http://www.facebook.com/HobieCatCompany


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PostPosted: Mon Jan 25, 2016 7:12 am 
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Daggerboard case has been reinforced! I added about 8 layers of glass to the rear corner, both woven and mat. Added about 3 layers to the front corner.
Image


Also added a layer of woven fiberglass on the decks where there were some spider cracks.
Image

_________________
2003 Hobie Fox, Hull #38, sail #101.
1981 Hobie 16, sail # 79737. 1981 Prindle 16, sail # 4544
Rear Commodore, Utah Lake Yacht Club


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