| Re: soft spot on hobie
[Re: hobie1616]
#108322 05/26/07 01:22 PM 05/26/07 01:22 PM |
Joined: Jun 2001 Posts: 1,252 California mmiller
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Posts: 1,252 California | Yep. Git Rot! http://www.hobiecat.com/community/viewtopic.php?t=1156<< Hulls - Soft or Delaminated hulls on older boats Soft hulls are caused by the foam and fiberglass layers becoming seperated or delaminated. This can be caused by heat, repeated compression (walking on) or other factors related to materials and age. This is normally correctable. A soft area is a structural breakdown and should be corrected before sailing the boat. Soft areas in decks near or ahead of the forward cross bar can cause complete failure of the bow and must be repaired before sailing the boat. If your Hobie has soft or "delaminated" hulls or deck areas, take a look at the following link: http://www.hobiecat.com/support/tech/delam.html I did a search on Google to find information on the material that is excellent for this kind of repair "Git Rot" Flexible penetrating epoxy: http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=Git+Rot>> | | | Re: soft spot on hobie
[Re: mmiller]
#108323 05/26/07 02:21 PM 05/26/07 02:21 PM |
Joined: May 2007 Posts: 3 jimd OP
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Posts: 3 | | | | Re: soft spot on hobie
[Re: flyingfool]
#108327 05/29/07 12:11 AM 05/29/07 12:11 AM |
Joined: Jun 2001 Posts: 493 Minnesota Jeff Peterson
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Posts: 493 Minnesota | I had to repair both my hulls over a two year period. Wouldn't you know, as soon as I repaired one hull, the next year the other delaminates! Luckily, I had bought a quart of marine epoxy. It was enought for two jobs. So, with that experience, I would say a two foot long delamination will take about a pint of epoxy. Buy more than you need. It is better to have too much, than not to have enough to finish your job.
Jeff Peterson H-16 Sail #23721 Big Marine Lake, MN
| | | Re: soft spot on hobie
[Re: flyingfool]
#108330 05/30/07 12:37 AM 05/30/07 12:37 AM |
Joined: Jun 2001 Posts: 493 Minnesota Jeff Peterson
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Posts: 493 Minnesota | I used a 40 cc syringe. I bought it from Fleet Farm, in Hudson, WI. Its a department-like store that also sells agriculture/animal supplies to farmers. You have to buy the (unneeded)needles seperately, so that wasn't a problem. Buy the syringe first, then drill a hole that creates a tight fit for the syringe tip. Too loose a hole and you won't get enough pressure to force the epoxy. But you don't want it so small it takes forever. It will be apparent what size drill to use.
Jeff Peterson H-16 Sail #23721 Big Marine Lake, MN
| | | Re: soft spot on hobie
[Re: Karl_Brogger]
#108332 05/30/07 08:42 AM 05/30/07 08:42 AM |
Joined: Jun 2006 Posts: 44 Minnesota hititmaestro
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Posts: 44 Minnesota | you could also go to Fleet Farm and look in the livestock section for syringes
When i was your age Pluto was a planet
Blake Johnson
1973 hobie 16
sail 2663
| | | Re: soft spot on hobie
[Re: flyingfool]
#108334 06/03/07 06:32 PM 06/03/07 06:32 PM |
Joined: Jan 2004 Posts: 1,884 Detroit, MI mbounds
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Posts: 1,884 Detroit, MI | Hobies have never had a balsa core. Your hull is dead. It just doesn't know it yet. By drilling through the bottom layer of glass, you made the repair that much more difficult. Until you plug those holes, any epoxy injected will run through to the hull interior. You need to put a port in to plug the holes from the inside. This topic has been convered extensively in the Hobie Community Forums - here. | | | detailed way to fix soft spot with "git rot"
[Re: Karl_Brogger]
#108335 06/05/07 07:47 PM 06/05/07 07:47 PM |
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Posts: 3 | I just did this to my boat. Make sure you buy more than enough "git rot" I had an area roughly 18 inches by 10 inches and I used up an entire pint almost, the soft area will soak it up. first thing to do is tape off the entire soft area, find tape that sticks well to the top of the hull, i had difficulty with blue painting tape, but it could just be my hull. Draw out the area that is soft, easiest by knocking on it and listening. drill small holes on the inside of the mark (breather holes) maybe 1/16th and drill through the first layer of fiberglass and then through the foam until you touch the second layer, don't press hard and you wont go through the second layer, let the drill do the work don't press down, don't go through the second layer or you will be screwed. You don't need to drill a lot of holes, I drilled probaly 6-8 holes for my area, and it seemed to work. When that is done drill another hole for the tip of the "git rot bottle" It only comes with pint size and bigger, not the small 4 oz size. Drill this hole on the higest part(center) of the topside, this allows gravity to do its job and spread the epoxy. No matter if your spot is on the side of the top side, still drill the hole as high as possible. The size of the hole will vary because the user needs to cut the tip of the bottle. I drilled a hole in a piece of plastic to make sure I had a really good fit, and I ended up using an 1/8 inch hole. You need a good tight fit so get rot doesn't come spewing back out the hole. Remember you are drilling all of these holes only through first layer of glass and foam, and there should be tape where you are drilling, to keep your topside clean. Mix the "git rot" in the bottle and shake it for 1 minute then squeeze it in there, it says you only have 20 seconds, but i did it in the evening when it is a bit cooler and it lasted a bit longer than that. Do it quick, but keep a close eye on your breather holes, soon as it comes out have many pieces of small tape ready so you can cover the holes. make sure you leave the tape on the holes for a while, if you take it off and the git rot hasn't cured it will come out the breater holes. It can be a pain in the butt to take it off later, but it will be done right, and you know you can get tape glue off with some elbow grease, git rot is a bit tougher to get off the top of the hull. after this get some gel coat patching material fill in all of your holes, and go sailing. good luck. hope this helps. | | | Re: soft spot on hobie
[Re: katieroo81]
#108339 06/19/07 12:11 AM 06/19/07 12:11 AM |
Joined: Jun 2001 Posts: 493 Minnesota Jeff Peterson
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Posts: 493 Minnesota | Don't drill the holes with a power drill!
Get a hand drill and then it is easy to be careful. After you break through the first layer, don't push down. Let the weight of the hand drill push through the foam.
Jeff Peterson H-16 Sail #23721 Big Marine Lake, MN
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