Thanks for the suggestions BT.
I've got no power to the boat. Checked the for power at the ignition switch and nothing there. Inspecting the fuse and it is pretty corroded, so that is why I'm replacing. It might not be the reason for no power, but seeing that it was rusted and corroded, was thinking to replace it.
I have red and orange wires that go to the fuse on one grommet. Any idea what the orange one is?
Just for clarification, your suggestion about using the 80A maxi fuse, is that to replace the existing fuse or is that to attach between the red wire and the battery post?