A gasoline fuel system (fig. 4-1) draws fuel from the tank and forces it into the fuel-metering device (carburetor, gasoline injectors), using either a mechanical (engine-driven) or electric fuel pump. The basic parts of a fuel supply system include the following:

• FUEL TANK (stores gasoline)
• FUEL PUMP (draws fuel from the tank and forces it to the fuel-metering device)
• FUEL FILTERS (removes contaminants in the fuel)
• FUEL LINES (carries fuel between the tank, the pump, and other parts)