what is the function of the keel stringer?

[Trayder]

Mine was rotten. I tore it out and replaced it with 1/2 round 4" PVC/ I then covered the PVC with 2-3 layers of roven woven.

I use the inside of the 1/2 round as the drain to the bilge from the fwd compartment.

My Contender uses the same theory, I just copied it.

Give me a year or two to tell you if it works but so far so good.

I have been able to lift the hull up with a floor jack, placing the jack directy under the bottom center of the boat, so replacing the wood with PVC/ Glass has proven plenty strong.