Outboard motor

An outboard motor comprising:

• an internal combustion engine;
• an upstream fuel supply path to be connected to a fuel tank that stores a fuel of the internal combustion engine;
• a vapor separator tank that is connected to the upstream fuel supply path, and separates a fuel vapor from a liquid fuel;
• a downstream fuel supply path connected to the vapor separator tank;
• a fuel pump that is provided inside the vapor separator tank, and discharges a fuel in the vapor separator tank into the downstream fuel supply path;
• a fuel pressure sensor that detects a fuel pressure inside the downstream fuel supply path;
• a controller that applies fuel pressure feedback control to the fuel pump according to detection results of the fuel pressure sensor;
• a fuel injector that injects a fuel inside the downstream fuel supply path into the internal combustion engine;
• a downstream check valve that is provided in the downstream fuel supply path, and allows a flow of fuel from the vapor separator tank to the fuel injector, and prohibits a flow of fuel from the fuel injector to the vapor separator tank;
• a downstream bypass path including a first end connected to a downstream portion that is closer to the fuel injector than is the downstream check valve in the downstream fuel supply path, and a second end connected to an upstream portion between the downstream check valve and the vapor separator tank in the downstream fuel supply path;
• and
• a downstream relief valve that is provided in the downstream bypass path, and opens the downstream bypass path when a fuel pressure in a downstream region that is closer to the fuel injector than is the downstream check valve in the downstream fuel supply path exceeds a first predetermined value.