Abstract: A dual shut-off valve includes a valve body having a first inlet passage for communicating with the fuel supply line, a second inlet passage for communicating with the oil supply line, a first outlet passage and a second outlet passage. A first valve ball has a center passage and is rotatable between a first valve open position and a first valve closed position. A second valve ball has a center passage and is rotatable between a second valve open position and a second valve closed position. A shaft is coupled between the first valve ball and the second valve ball for rotating the first valve ball between the first valve open and closed positions and simultaneously rotating the second valve ball between the second valve open and closed positions. A handle can be used to rotate the shaft.