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 Catalina 250 Specific Forum
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twilliams
Deckhand

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USA
3 Posts
Initially Posted - 03/31/2002 :  11:47:09  Show Profile
I have noticed some of you have had a blistering problem with the Catalina 250 WB. I have a 1996 Catalina 250 WB Hull 227 that I keep in a lake on the Tennessee River. Last year I found about 300 blisters about the size of the end of your little finger. The repair is expensive even though Calalina is working with me to supply materials. My question is: Is it possible to get blistering from the water ballast tanks? My first conclusion was the blistering was clasical river water through the gelcoat. After looking closer, and before I do an expensive repair, I an wondering if blistering can occur from the inside out from the water ballast tanks. Thanks for your comments. Tom
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tinob
Master Marine Consultant

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USA
1883 Posts
Response Posted - 04/02/2002 :  09:23:35  Show Profile
Good morning Tom,

I drive an'83 Cat 25 that had a significant amount of blisters the size that you describe. While researching the cure I came across testament of knowledgeable people who maintained that blistering can come from water on either side of the hull. The possibility that a water balasted hull might be at risk didn't occur to me until you mentioned it. It seems that such might be the case.

Val on the hard DAGNABIT

Val Bisagni
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mday
Navigator

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197 Posts
Response Posted - 04/02/2002 :  17:50:03  Show Profile
Hi Tom,

I have a C250WB I keep in the water, so I'd be interested in hearing
what Catalina is saying about this. So far, I haven't encountered any blistering problems, except on my rudder, which had a scrape in the end allowing water seepage into the laminations. Did you paint your bottom? When I originally looked at keeping the boat in the water, painting the bottom was highly recommended, since the C250WB hull wasn't treated for long stays in the water.

As I understand blistering, it's water absorbtion into the outer fiberglass layers. Given the thickness of the hull, I'd expect blistering visible on the outside of your hull would be caused by the water your boat is in and not the ballast. Just a guess (and maybe wishful thinking) on my part.

Please keep me informed of any new info.

Thanks,

Max


Max Day
C250 WB 380
Lake Pleasant, AZ
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twilliams
Deckhand

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USA
3 Posts
Response Posted - 04/06/2002 :  22:17:40  Show Profile
<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
Hi Tom,

I have a C250WB I keep in the water, so I'd be interested in hearing
what Catalina is saying about this. So far, I haven't encountered any blistering problems, except on my rudder, which had a scrape in the end allowing water seepage into the laminations. Did you paint your bottom? When I originally looked at keeping the boat in the water, painting the bottom was highly recommended, since the C250WB hull wasn't treated for long stays in the water.

As I understand blistering, it's water absorbtion into the outer fiberglass layers. Given the thickness of the hull, I'd expect blistering visible on the outside of your hull would be caused by the water your boat is in and not the ballast. Just a guess (and maybe wishful thinking) on my part.

Please keep me informed of any new info.

Thanks,

Max


Max Day
C250 WB 380
Lake Pleasant, AZ

<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>
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twilliams
Deckhand

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USA
3 Posts
Response Posted - 04/06/2002 :  22:22:04  Show Profile
I will be happy to keep you posted. At present I am planning to take the boat to Atlanta for repairs next week. Thank you for your comments. Tom
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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.