my boat is not in the water yet...i put muffs on lower unit and let water flow.. started it up...and she starts to get very hot...i did not see any water flowing on the 2 hoses that go from thermstat houseing 1 on the left the other on the right...no water<newbie stick with me here> would like to know what i should to fix...i dont think there was water flowing from that hose that goes to lower unit either.....thanks please help