About a month ago my boat was filled with saltwater overnight. The 89 80 hp Mercury outboard was not submerged however. After bailing the boat out, I tried to start the engine. It would start but would not keep running. I figured it got water in the gas. Upon trying again with fresh gasoline the motor would not even try to turn over. All I get is the starter engaging and a low whining sound. The flywheel will not budge. What is my first move?