Abstract: A mounting system includes a restraint pan into which an auxiliary fuel tank is placed, a harness extending over the fuel tank, and a pair of brackets each having a corner receptacle for engaging a corner of the fuel tank. The corner receptacles are each reinforced by a gusset. Each bracket includes two arms having a pair of holes that align with each other. The first holes receives a bolt, making a pivoting joint between the arms and the second holes receive a removable pin for aligning the two arms in a locked position. Each end of the brackets is a clevis for engaging a cargo ring. The harness includes a pair of straps interconnected by a web and ratchets for tightening the straps. The pan prevents horizontal movement of the fuel tank, the harness resists vertical movement of the fuel tank, and the brackets prevent vertical motion and tipping motion of the fuel tank.