Fill hole with what?

[Kracker Jack]

Originally Posted by phatdaddy

1" is a big hole for a cable. I'm guessing you had to get the plug through. Was it wood or composite cored? I'd coat the inside of the hole with epoxy before putting in a filler. Might even be able to get a transom drain tube to fit

Definitely do what's stated here (coat raw core material with epoxy or a reduced resin) then fill with 5200 and clam shell over hole.

[Destroyer]

For large holes you can also make 5200 go further and fill easier by mixing in some sawdust. (The coarser the better) Squeeze 5200 into a mixing cup, add no more than 1/3 by volume sawdust. Mix thoroughly so all sawdust is coated with the 5200. Trowel into the hole after coating the inside of the hole with epoxy. Hold in place with plastic wrap and scotch tape until the filler has set up so it doesn't run out. Remove the plastic wrap, cover with the clamshell and you're good to go.

[jvitiel]

Epoxy the inside of the hole and put a single hole laboratory stopper under the clam shell. Secure enough yet easy to remove.

https://www.medical-and-lab-supplies...ole-qty-1.html

[phatdaddy]

great idea, jv. don't tell it's going on a boat, it'll be $10.76

[steplift20]

I like the idea but 5200 is impossible to remove some time in the future wouldn't 4200 be better?

[spareparts]

use a hole saw and cut a plug out of another piece of wood. Cut a key hole in teh plug for the transducer. Epoxy seal both the plug and the hole in the transom, slip the plug over the cable, silicone the outside of teh plug and slide it in the hole, Put a clam shell over it. If you ever need to remove the plug you can knock it out