Got it. I was hoping the water pressure from the garden hose (using a fake a lake) would push water through the system and come out of the pump housing since I had pulled the cover and impeller. Instead, the water was just spraying along the bottom of the hull where the fake a lake meets the hull. I didn't see any water in the bilge area.

Ideas on the next steps? Start pulling hoses to see what I find?

Where does the heat exchanger fall into the mix? I assume it's also cooling oil so I would need to make sure I am pulling the correct hoses.