I got the isolator replaced, it is still not working as I think it should.
I am pulling the starting battery to have it tested and to redo the connections there. More to follow
The good news is that the house batteries are charging, so I am not limited in my ability to use the boat. But I have an 8 day trip planned end of month, with some time on the hook, so I don't want to mess around.
Regards,
Kurt