repairing a bad repair

[nonone]

Will try to post a picture tomorrow . Boat on blocks with bow high. No water
in bilge as far as I can tell. Space next stringer under battery hatch not visible.
Not taking on water last summer. I don't think there is no through crack but not sure. Roving appears solid. Could there be wood in the strake? Water coming out is a bit brown/yellow. I know I have to grind it, but once I do there is no turning back. That is my problem. Would like to have some idea of what Im in for before starting