Mercruiser 4.3 Wiring Diagram | Free Wiring Diagram Assortment of mercruiser 4.3 wiring diagram. A wiring diagram is a simplified conventional pictorial depiction of an electrical circuit. It shows the parts of the circuit as simplified shapes, and the power and also signal connections between the devices. Mercruiser Ignition Wiring Diagram | Free Wiring Diagram Variety of mercruiser ignition wiring diagram. A wiring diagram is a streamlined standard photographic representation of an electrical circuit. It shows the parts of the circuit as streamlined forms, and the power as well as signal links in between the tools. MerCruiser Starter Wiring | Gone Outdoors | Your Adventure The electrical connections for a MerCruiser starter motor are made on the solenoid. The solenoid is attached to the top of the starter and sends electrical current to the starter when the ignition switch is turned on. Mercury marine has changed starter and solenoid 1996 4.3 Wiring Diagram? Page: 1 - iboats Boating Forums Re: 1996 4.3 Wiring Diagram? The fuel pump should be running as long as you are cranking the engine, oil pressure or no oil pressure. If you crank for 4 or 5 seconds, the carb would be full of fuel and the engine should run for 15 to 20 seconds until the carb runs out. Look at the purple yellow wire in the wiring diagram.