stringer "maintenance"

During preparations for winterizing the boat, I noticed that the "weep" holes in the stringers between the exhaust channel and engine well were clogged. After cleaning out and drying, the stringers appear to be solid except for about an inch around the hole. The fibergla$$ is still intact. Here is my plan and I wanted to get ya'll's opinion before starting.

Gonna fill the deteriorated void with something?(any suggestions?). It has to be putty-like to allow me to work it in behind the hole and also to keep it from flowing in to the engine well. Not going to seal the hole, just the area around it.
Next, I plan to seal the filler with silicone, epoxy,etc.
The final step will be to take a 1/2" piece of copper, about 4" long, flare one end, grind the bottom flange flat so as not to create a lip, then silicone it in place.
My idea is to create a true port that is free flowing and easily cleaned.

Any ideas before I begin? I did not see anything in the archives quite like this and maybe I can prevent/prolong stringer replacement. The rest of the boat and floors are in excellent shape. Thanks, in advance for your help...Joe

I hate silicone! It doesn't even stick to itself. Use 3M 5200 adhesive/sealant or life caulk. They don't refer to 5200 as a adhesive for no reason. The only place silicone is good is when it's compressed between two flanges and I've even had that fail.
As a wood boat owner, I really don't like the use of git rot since it is a temporary solution. The wood next to the git rot fill will now rot faster but sometimes it's the only choice. Wood that is "encapsulated" is always a problem. Pete

I suggest you purchase way more "Git Rot" than you think you could possibly need. If you do not use it all, you can take it back. However, if you run short, you are SOL (and I am not talking about beer).