Help Needed, What Is the Cause and How to Recover it?

[Icarus]

Hi, my advice is take her out of the water..then u can start grinding ..from the inside if you can't find anything on the outside...looks like a badly done repair job..something copper underneath which bled through the laminate?
look and see when on the dry.
I had a similar problem on an older racer..the yacht had a speedo sender (Doppler) glassed into the hull..and through time it started to decay..looked like a boil..
Is your hull a solid layup under water or has it a core? hopefully not a Balsa core which tends to soak up water and if there is some copper fitting it may just corrode away ..so someone put a patch of glass over it?
Good luck

[Vasco]

It's in the aft cabin so it definitely is not a keel bolt. It might be the "P" bracket. Sometimes the bracket is embedded in a lump of gelcoat inside the hull. If it's corroding this might be it.

[Xland]

Originally Posted by Vasco

It's in the aft cabin so it definitely is not a keel bolt. It might be the "P" bracket. Sometimes the bracket is embedded in a lump of gelcoat inside the hull. If it's corroding this might be it.

Vasco, you are right. After spending days trying to figure it out, finally got some pictures from the seller of the boat when it was hauled out. The photos provide a good reference of the position of the keel. And it's so dumb of me not realised that the keel cannot be aft of the engine where the prop shaft goes through. So the only possible structure left is the "P" bracket.

And I only got this figured out now!

Checked yesterday and water is oozing out very slowing from the lump, and I used epoxy to try to do a patch work to slow the oozing till I haul it out.

Thanks guys.

[perchance]

It could be an redundant through hull that's been glassed over. You will know on haul out if that if the case.