Here are our thoughts about this deck leak!
Any deck leak, no matter how small, in the main cabin of a Super Maramu is a serious issue that needs to be addressed RIGHT AWAY.
This is the voice of painful experience. A TINY little salt line was all that alerted us to one of the biggest jobs we have had to do to our boat.
Here is why...
From the aft edge of the hatch in the main saloon forward, the deck is pretty standard balsa cored deck.
Right behind the hatch, the deck surface rises about 3 inches, while the cabin ceiling height does not change.
The cabin ceiling here is thin (4-6mm plywood) and there is an empty space between the cabin ceiling and the structural underside of the deck.
If there is ANY leak into this space, the water is free to roll around, and will find a place to drip down probably quite remote from the actual source.
What makes this situation so serious, is the back edge of the balsa core on the forward deck is not sealed, and is exposed into this space. It will soak up that water, and rot. This is a big expensive repair to do right.
Leaks into this space can come from the traveler, but more likely is from the hatch in the main cabin.
There is a hardwood frame around the hatch opening, and the hatch frame is screwed into this with wood screws.
A lot of force is applied to the screws that secure the hinge side of the frame.
If one of these starts to leak, the wood saturates, and water is then deposited into that empty space between the sailing and the deck, and problems start.
Karen Smith & Bill Kinney