Hi Easy, similar situation here. It appears from your original pictures that the keel stub joint has been compromised, likely from some sort of a hit. Sea water is seeping in, thus the water coming out while on the hard. Understanding how Hunter constructed these boats, it is unlikely that crack resulted from normal operation.
The correct way to fix it is to lift the boat off the keel, clean and fair the joint, re-bed with 3M-5200. Also, have the yard doing the repair add washers to the keel studs in order to raise the keel nuts up into fresher threads just in case the hit damaged the original stud threads. That is how we had our keel stub joint repaired in 2004.
After the boat was placed back on the keel and studs torqued, the joint was sealed with two coats of barrier paint, followed by two coats of hard bottom paint, then two coats of ablative. The joint remains solid to this day after sailing thousands of miles all over PNW waters.
We used to keep our boat at the Everett Marina, but found Shelter Bay more accommodating and much closer to the islands.