Are these cracks a problem? I’m looking at at 2001 Rib for sale. It’s never been anti fouled but has these cracks in the gel coat that run longitudin

dpb

Well-known member
Joined
14 Feb 2007
Messages
1,191
Location
Poole, Dorset
Visit site
We had a boat with cracks like that repaired under warranty as it was down to substandard construction. I would certainly walk away from the one you are looking at.
I have had 20 plus year old boats most of my boating life and never came across such cracks except for the one stated above.
 

Ribtecer

Well-known member
Joined
23 Aug 2006
Messages
1,419
Visit site
What make is the Rib?

Some commercial type ribs are heavily made up. Some more leisure ribs are of a lighter construction and therefore will flex more.

But I would agree its unusual.
 

Homer J

Active member
Joined
19 Jun 2017
Messages
534
Visit site
What make is the Rib?

Some commercial type ribs are heavily made up. Some more leisure ribs are of a lighter construction and therefore will flex more.

But I would agree its unusual.
It’s a Ribtec 585 from 2001 in otherwise good condition with only 347 hrs engine hours on the original engine so must assume very light use and never been anti fouled.
 

Ribtecer

Well-known member
Joined
23 Aug 2006
Messages
1,419
Visit site
It’s a Ribtec 585 from 2001 in otherwise good condition with only 347 hrs engine hours on the original engine so must assume very light use and never been anti fouled.
Ribtecs from that era where very, very good boats. If the price is right it could be worth a punt.

As you may well conclude from my name on here, I have some experience with them.

Kerian at Ribshop at Hamble Point used to work for them and is very knowledgeable , you could ask him his opinion.
 

Ribtecer

Well-known member
Joined
23 Aug 2006
Messages
1,419
Visit site
Make sure it's a UK built boat, after the firm was sold production was switched to S.A. and whilst still OK they were not as good as UK boats in everyway.

If its a S.A. boat I think I would walk away.
 

dombuckley

Well-known member
Joined
11 Apr 2005
Messages
1,121
Location
Norfolk
Visit site
Thanks for your response. The reply is that everything else seems rock solid. The floor underfoot is extremely firm but I can see into the hull. What could I look for or tap for?
Take a big mate with you, and get him to lean inwards and outwards on the buoyancy tube, while you look for any movement in the cracks. The hull is pretty well supported forward and aft by the structure of the buoyancy chambers under the floor, but these hulls can be prone to 'hinging' amidships around the outer edge of the rigid floor amidships, in the position indicated below.


cross section.png


Found this around the edge of the floor (under the buoyancy tube) inside of a 535 from 2007, which had less than 100 hours on the clock.

IMGP7783b.JPG
 

Ribtecer

Well-known member
Joined
23 Aug 2006
Messages
1,419
Visit site
Take a big mate with you, and get him to lean inwards and outwards on the buoyancy tube, while you look for any movement in the cracks. The hull is pretty well supported forward and aft by the structure of the buoyancy chambers under the floor, but these hulls can be prone to 'hinging' amidships around the outer edge of the rigid floor amidships, in the position indicated below.


View attachment 175826


Found this around the edge of the floor (under the buoyancy tube) inside of a 535 from 2007, which had less than 100 hours on the clock.

View attachment 175828
2007 would almost certainly have been a South African built Ribtec.
 

Keith-i

Well-known member
Joined
4 Jul 2012
Messages
1,407
Location
Jersey
Visit site
That seems to be to be quite a lot of cracking in a very localised area. As others have said, it is not unusual to find stress cracks on a rib, but that many all in the same location would concern me and I would want to know more before committing. Is there a similar effect on the other side of the boat in the same location? If not then it could be a result of some form of impact damage just on that side.

I bought a new rib many years ago from a local cottage industry company and it started displaying very similar cracking. After a bit of negotiation they took the boat back and built a replacement hull after claiming their laminator had left out a layer of glassfibre in the original.
 

dombuckley

Well-known member
Joined
11 Apr 2005
Messages
1,121
Location
Norfolk
Visit site
2007 would almost certainly have been a South African built Ribtec.
IIRC it was one of the first ones built in SA, and it turned out to have been built in a rush to get it shipped to the Southampton Boat Show on time. But the poor lay-up in that example just exposed a known weak spot of many RIB designs of that era; more recent designs have much better support in that area.

The problem with HINs / WINs / CINs is that the country identifier is the location of the company that built it, not the actual builder, so it's not always clear when manufacture has been outsourced. So it pays to do your homework.
 

Homer J

Active member
Joined
19 Jun 2017
Messages
534
Visit site
Ribtecs from that era where very, very good boats. If the price is right it could be worth a punt.

As you may well conclude from my name on here, I have some experience with them.

Kerian at Ribshop at Hamble Point used to work for them and is very knowledgeable , you could ask him his opinion.
Thank you. I will try Keira.
 

Hot Property

Well-known member
Joined
11 Aug 2015
Messages
1,540
Visit site
It has a Yamaha 100 from 2001 with 347 hours but I also have a 3yr old mercury 100hp to put on it.

Ah that's a better engine to put on it.

You should get around £3,500 for the Yammy - maybe more if you can sea trial to a prospective buyer.

I never buy a bigger engine without a sea trial...
 

fisherman

Well-known member
Joined
2 Dec 2005
Messages
19,675
Location
Far S. Cornwall
Visit site
These cracks would not show inside. I repaired cracks in gel coat, they were also in the substrate, I had to grind that back as well. Imo very difficult to crack the gel without cracking what it's attached to.
 
Top