Quote Originally Posted by Engine Nut View Post
Don't do that. The engine cooling system requires circulation of coolant through the heater loop. Turning the pump off will stop the flow of coolant through the heater loop and will likely cause an engine overheat.
I don’t believe that is true. When I ordered the boat the Heater was an option ( $800.00 one!) and all they do is create and extra loop of heater hose circulated by the pump. Then all those boats without a heater should overheat.