hi guys 1987 searay 5.7 I/O, has dual batteries with a switch, new starter, new alternator, new batteries, the boat only start when the switch is selected on both batteries or battery 2, if I selected battery one nothing happen. The switch been installed according to instructions. battery one to switch connector marked batt 1, battery to switch connector marked batt 2, then the connector marked starter on the switch goes to the starter lug, any idea thanks.
