Priming fuel system method and apparatus for marine engines

A fuel system for fluidly connecting a fuel tank with an engine includes a low-pressure fuel circuit fluidly connected to the fuel tank. A high-pressure fuel circuit is supplied with fuel by the low-pressure fuel circuit, and is fluidly connected to the engine. A priming fuel circuit includes a priming fuel conduit and a priming valve. The priming fuel conduit has a first segment and a second segment. The priming valve has an inlet and an outlet. The first segment of the priming fuel circuit fluidly interconnects the low-pressure fuel circuit and the outlet of the priming valve. The second segment of the priming fuel circuit fluidly interconnects the high-pressure fuel circuit and the inlet of the priming valve. The priming valve is operable to control a flow of fluid through the priming fuel conduit to thereby selectively fluidly connect and disconnect the high-pressure fuel circuit and the low-pressure fuel circuit.