As Vic had mentioned to me before, it is a common thing for the prop strut bolts to leak. This does not get into the core because of the solid mold for the strut. After running the boat, My bilge would fill up every 12-24 hours until the algae growth would cover the bolts again and slow the leak. I could not find where the water was coming from anywhere as it was not the stuffing box and somewhere under the cabin liner and only happened after running the engine. After mentioning it here, Vic said it was the strut bolts. After fairing it two weeks ago, no leaks after running the engine.
I guess owning two J/30s makes him twice as smart. Thanks Vic!
