Holes in hull ?!?!

[largoman]

I've taken delivery of the 1979 23' cuddy. Now the, uh, "fun" begins. I finally was able to crawl all the way under the boat only to find a few holes that need fixing.

1. The previous owner had installed a float switch in the bilge with a screw and put it right thru the bottom of the hull (tip is barely poking thru the paint.

2.I also found another small hole nearby (3" away) which has what appears to have some type of flexible rubber material extruded thru it from the inside and and hanging out a bit. Perhaps an attemp to plug/seal it.

3. There is also an old thru hull transducer on the other side of the kell center line that I'm suspicious of. It appears to be installed thru "fairing?" blocks inside the hull and out to to keep it shooting straing down. I'm unlikley to get a new thru hull transducer due to their cost (probably get a transom mount) and am willing to just leave the old thru hull transducer alone unless it will be a problem (e.g., leaks, etc.)

Any thoughts on this old thru hull transducer are welcome.

The immediate concern is the screw hole and its sidekick. I've gotten a couple of repair advice opitions

A. Use Marine Tex from the inside and push it into the holes (with a match stick or similar) until it comes out the bottom, allow to cure, then sand and paint the spot on the bottom

B. Drill the holes thru and counter sink them on the outside, install a pan head bolt in each from the outside with 5200 adhesive and a washer/nut on the inside.

Does anyone have advice/opinions on these options or others? Just so you have all the details, the holes are not large in diamiter (diameter of a match stick or 1.5 match sticks. Also the hull is painted but just regular paint, not bottom paint.

Thanks in advance, Largoman