Only a two year old 178 Ranger. My Mercury 75 hp has failed to start (twice) after I run it down the lake for a while. It also died on me while running after I ran it for it for twenty minutes. It starts again after it sets for couple of hours. The trim switch on the throttle handle also don't work when the motor won't turn over, but the trim on the motor works. Battery is charged and terminals tight. Is there something that when it heats up it causes problems and when it cools everything works again? It's no fun to be towed in or troll in when the fish are biting.