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 Catalina 25 Specific Forum
 Chain Plate Failure		  New Topic  Topic Locked
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jerlim
Master Marine Consultant

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USA
1484 Posts
Initially Posted - 07/07/2015 :  07:13:01  Show Profile
A cautionary tale.....

The port side forward lower shroud eyebolt failed on Sunday while underway.

The rig is tensioned to be fairly tight, but not crazy...When at 25 deg of heel, the lee-side shrouds have a little play in them.

We were close hauled and making 6 - 6.2 knots at about 25 deg, when we crossed the wake of a +50' cruiser who was too close and going too fast for the area we were all in. When crossing the wake ~ easy 4' swells ~ we came down hard and the eyebolt failed.

I immediately let loose the genny and main sheets to relieve strain on the mast, then furled the genny and dropped the main. We secured the flailing shroud and motored back to the yard.

CD has upgraded the replacement eyebolts from 3/8" to 1/2". I ordered a set and will replace all this weekend. Will also inspect the uppershroud chain plates.

The eyebolt failed due to corrosion. I have never inspected them in the 9 years we've had Whisper and believe them to be original parts...35 years old…we got away easy on this one, I need to be more vigilant and thorough with inspections..
Jerry

Stu Jackson C34
Admiral

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844 Posts
Response Posted - 07/07/2015 :  10:20:32  Show Profile
Chainplates should be considered part of regular maintenance.

Sorry to hear about your misfortune. Good action on your part. Well done.
Stu
1986 C34 #224 "Aquavite"
Cowichan Bay, BC Maple Bay Marina
(formerly San Francisco)
(formerly C25 #2459 "Capricorn Two")
Edited by - Stu Jackson C34 on 07/07/2015 10:21:35
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Merrick
Navigator

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USA
192 Posts
Response Posted - 07/07/2015 :  14:39:44  Show Profile
thanks for the post. my boat is about the same vintage and also in salt water so time for a close look.

1981 #2555 "Aero"
sk/sr
Coosaw Island, SC
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islander
Master Marine Consultant

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USA
3992 Posts
Response Posted - 07/08/2015 :  09:02:20  Show Profile
That's probably the reason Catalina upgraded to thicker eyebolts. Crevice corrosion like rust never sleeps...Tic,Tic,Tic.. Here is an example of a SS bolt that never gets to dry out.
Scary huh, Now you won't sleep at night..
Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound


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jerlim
Master Marine Consultant

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USA
1484 Posts
Response Posted - 07/08/2015 :  10:46:37  Show Profile
Scott - Where was that bolt?
Jerry
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islander
Master Marine Consultant

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USA
3992 Posts
Response Posted - 07/08/2015 :  11:40:59  Show Profile
Jerry, It's an internet photo showing what crevice corrosion can do. Crevice corrosion occurs where ever the metal gets wet and stays wet, Not having any air circulation to dry out as in a bolt or chain plate that passes through a hull or is attached to a hull. The caulk fails and water seeps into the crack between the bolt or chainplate and never can air dry in that little crevice and slowly corrodes the metal. Most standing rigging failures also occur in the swag joint corroding and pulling out, Not the wire breaking.
Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound


Edited by - islander on 07/08/2015 11:56:13
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Voyager
Master Marine Consultant

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USA
5231 Posts
Response Posted - 07/08/2015 :  20:23:57  Show Profile
Scott,
I wonder whether my keel bolts look like that !?!?
Never hear of C25 keels falling off however...
Bruce Ross
Passage ~ SR-FK ~ C25 #5032

Port Captain — Milford, CT
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islander
Master Marine Consultant

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USA
3992 Posts
Response Posted - 07/09/2015 :  11:09:17  Show Profile
quote:
I wonder whether my keel bolts look like that !?!?

LOL..Like I said, Now you won't sleep at night!
Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound


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bigelowp
Master Marine Consultant

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USA
1736 Posts
Response Posted - 07/12/2015 :  18:44:44  Show Profile
Ah and yet another reason not to sleep! My1980 was a derelict before she became mine. Despite survey saying otherwise I have always been concerned with my keel bolts and now it appears the chain plates, which look fine, may be suspect as well. This is when having an X-ray would be sweet!
Peter Bigelow
C-25 TR/FK #2092 Limerick
Rowayton, Ct
Port Captain: Rowayton/Norwalk/Darien CT
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Stinkpotter
Master Marine Consultant

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Djibouti
9013 Posts
Response Posted - 07/12/2015 :  20:09:35  Show Profile
quote:
Originally posted by bigelowp

...and now it appears the chain plates, which look fine, may be suspect as well. This is when having an X-ray would be sweet!
Cheaper to just replace them. The upper shroud plates are the biggest risk, IMHO--possible crevice corrosion inside the deck they go through, and they share primary responsibility (with the forestay and backstay) for holding the mast up. CD has the direct replacements--not cheap, but good insurance on a 30+ year-old rig.

There is a cost to owning an older boat. It needs a little $love$.
Dave Bristle
Association "Port Captain" for Mystic/Stonington CT
PO of 1985 C-25 SR/FK #5032 Passage, USCG "sixpack" (expired),
Now on Eastern 27 $+!nkp*+ Sarge
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JanS48
Navigator

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USA
141 Posts
Response Posted - 07/12/2015 :  22:19:19  Show Profile
Greetings
After reading this thread I checked mine and they are indeed the "1/2" ones. Should I still dismantle one of the forward shroud eyebolts to inspect?
Thanks
Jan
82 C25 SR FK
Sailing out of Newport Harbor.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.