I got stringer problems!

[Vic]

Thanks for responding. I pulled out the stern storage or baitwell to do a hatch repair which revieled the bilge area so I figured clean it out while its open and noticed a crack between the bulk head and the stringer so I pushed on it. It has a cutout over the top of it for the fuel line and looks like the wood was exposed i reached into the stringer and am pulling chunks of wood out of it. I'm not sure how far forward it goes but the transom and about 10 to 12 " forward are solid. The boat was converted from the old sea drive in 1992. So that may explain why its still good. I was thinking about cutting the stringers out while leaving the lid on and since I'm a carpenter by trade maybe sistering them as far forward as i could, but I really would like to fix it for good.