What is This

Oct 27, 2011
55
O'day 25 Dauphin
Does any one know what this black stuff is. It is on the entire inside to various degrees. It's on a 1976 O'day 25.
 

Attachments

Oct 27, 2011
55
O'day 25 Dauphin
I was afraid someone was going to say that. I'm looking at buying this boat. What will it take to clean...javex. This boat is sitting in -20c. Will mold survive this?
 
Jan 4, 2006
7,654
Hunter 310 West Vancouver, B.C.
Not Much Too Question About It ...................

Looks like the worst case of mold i've ever seen
.................. but you're probably more interested in how to remove it and then prevent its recurrence

One of the nastiest and yet sure fire remedies to remove mold is to scrub the entire area with a solution of bleach and a little soap detergent to act as a wetting agent. Make sure you've got plenty of ventilation for this.

Once everything is clean, ensure the interior has good ventilation to avoid high humidity which promotes mold growth.

Do a search for "mold" with the author name "Peggie Hall-HeadMistress" and you'll find an encyclopedia of information on this.
 
Apr 11, 2012
324
Cataina 400 MK II Santa Cruz
Yep, looks like mold. If that is a cloth liner, you may have to tear it out. Bleach kills mold, but the discoloration is very hard to get rid of. Try a patch and see.
 
Oct 27, 2011
55
O'day 25 Dauphin
There appears to be a product on the market called concrobium that will do the job if it is mold.
 
Dec 7, 2012
51
Oday 22 Chattanooga
Wear a mask. Pour a bleach and water solution and spray that entire area until it is soaked. Let that sit for about 30 minutes. It should turn from black to brown.

THEN clean/scrub the area. The single worst thing you want is any of that getting into your lungs.

I had a similar issue, though much smaller, and I just then repainted the hull liner. Looks fantastic.
 
Sep 25, 2008
992
Oday 25 Gibraltar
Don't even think of cleaning. It'll be easier and healthier to rip it out and install new liner. Mine was moldy and peeling off so I replaced mine. Looks like new. Got pictures posted in earlier posts. Don't have the time right now to ferret them out. If you're interested there are suppliers for the liner.
 
Oct 27, 2011
55
O'day 25 Dauphin
That's good news that the liner could be removed if necessary. Does anyone know of a supplier? While I'm at it, does anyone know of a good route to follow in getting the Vera 7 up and running? There is a guy in the UK, but is there someone on this side of the pond? Also where could I get the bearings/seals for the drive shaft - at the hull through and the support, and if I were to choose to pull the engine out altogether, how would I best plug the hull through?
 
Oct 3, 2010
130
oday 31 noank
rudy nickerson owns d&r marine in assonett ma. he was the parts manager for oday. he is the best source for parts