Abstract: A portable fuel tank includes a fuel-storing seat, a cap and a control mechanism. The fuel-storing seat includes a tank wall defining a fuel-storing chamber and formed with a fuel-feeding port at an upper portion thereof, and a fuel-discharging port at a lower portion thereof. The cap is mounted removably on the fuel-storing seat for covering the fuel-feeding port. The control mechanism includes a valve disposed movably within the fuel-storing seat and biased to a sealing position so as to close the fuel-discharging port in the fuel-storing seat. The valve is movable to a non-sealing position so as to separate from the fuel-discharging port, thereby allowing for drainage of fuel from the fuel-storing chamber through the fuel-discharging port by virtue of gravity.

Abstract: A portable fuel tank includes a fuel-storing seat, a cap and a control mechanism. The fuel-storing seat includes a tank wall defining a fuel-storing chamber and formed with a fuel-feeding port at an upper portion thereof, and a fuel-discharging port at a lower portion thereof. The cap is mounted removably on the fuel-storing seat for covering the fuel-feeding port. The control mechanism includes a valve disposed movably within the fuel-storing seat and biased to a sealing position so as to close the fuel-discharging port in the fuel-storing seat. The valve is movable to a non-sealing position so as to separate from the fuel-discharging port, thereby allowing for drainage of fuel from the fuel-storing chamber through the fuel-discharging port by virtue of gravity.