Originally Posted by beerbelly
as far as I am aware there is 2 buoyancy tanks under the floor at the transom end to help with the weight of the outboard when the hull is stationary and flooded .I don't think that the water from the flooded hull ballast system can get into the tanks (maybe it can get around them ?) I was concerned I would lose the buoyant effect from them if I punctured them. I may be totally wrong of course
I saw the picture in the referenced build thread, and yes it appears there are two buoyancy chambers, but I don't know if the deck is laminated to it, or if it's just suspended on top and the water can flow over it. If it gets between the deck and the top of the air chamber, then I could end up filling it with water, since I'm pretty sure the 3/4" screws I put through the deck would have made it through to the air chamber. I guess it depends how thick the deck material is. I doubt it's 3/4" though. When I put in the stainless screws, I used the same as the ones the guy before me used at the transom, and these just went through into the flooded hull so no worries. I had no idea there were air chambers further forward, so thought nothing of it. Tomorrow I'm going to shine a light in there. I put the 3" pad eye right down the middle of the pebbled area that a fuel tank would go, so I probably pierced both air chambers, one on each side. Like a #dumbass.