Hi. I was on the lake yesterday and on the way back the engine lost RPM.s and then died. I got towed back by another boater (thank you) and got it on trailer. When I got home a took the cover off the thermostat covers (both) were melted and gone, the thermostats were just dangling around. The plastic cover on the back of the motor was melted and there are two wires that go into the heads that were melted. My question is, will I need a new motor, or can this be repaired. How do I tell if the heads or block is bad? Thanks in advance.