MARINE ENGINE FUEL INJECTION DEVICE

A high-pressure fuel pump, high-pressure fuel filter and fuel pressure regulator are housed inside a case having resistance to corrosion and rust caused by salt water damage, shielded from the outside atmosphere. A position above a fuel level of a fuel tank is connected to a the atmosphere by way of a atmosphere connecting pipe. Mid way along the atmosphere connecting pipe, there are provided a fuel check valve at a side lose to the fuel tank, and an air check valve at a side close to the atmosphere. The position of the fuel check valve in the atmosphere connecting pipe, and the position of the air check valve are connected by a second ventilation pipe connected to inner parts of the case. Thus, the inner parts of the case are not directly connected to the atmosphere, and are only connected to the atmosphere connecting pipe for connecting the atmosphere (downstream side of an air cleaner for an intake passage of the engine) and the fuel tank. Since the inner parts of the case are not directly connected to the atmosphere, the occurrence of rust on the high-pressure fuel components such as the high-pressure fuel pump, the high-pressure fuel filter and the fuel pressure regulator is prevented.