Scratching my head about a hole in the hull

[tkeithlu]

I've never used Sikaflex; try it and let us know. I was surprised to find that the staff of our local yard wasn't aware that you could freeze 3M 5200. I've found no loss of performance with freezing and thawing repeatedly. I usually plug the opening and/or wrap it in plastic.

[Rumrace]

What a great read.
I second the tapered hole on each side then Systems West with micro balloons. About a $135.00 repair.
Core hulls usually refers to the part of the hull above the water. Any cored hull usually would have fallen apart by now. The cores were chopper gun glass foam and balsa. They all fall apart with water penetration.
I can’t relate to a 1/4” hull.
I have seen the famous Boston whaler abused and put away dirty get water in the foam core. They have a very thin hull like 8mm and foam in between for rigidity. Other cored hulls suddenly blow chunks. There was a Gulfstar and a Bayliner at one marina both chopper gun boats. Both delaminating and unrepairable. Both had solid hull bottoms.

[cal40john]

Originally Posted by jeanathon

Are there holes for mounting a bracket? The shape suggests it is a transom mount transducer.

Yes that is a transom mount design. They also work as a shoot through the hull transducer.

The last two cheap depth sounders I bought came with the transom mount transducer which the instructions also show how to mount inside the boat.

[jeanathon]

Originally Posted by cal40john

Yes that is a transom mount design. They also work as a shoot through the hull transducer.

The last two cheap depth sounders I bought came with the transom mount transducer which the instructions also show how to mount inside the boat.

Good to know!