A fuel tank system, engine employing such a system, and related method of assembly are disclosed. In at least one embodiment, the fuel tank system includes a fuel tank, a mounting bracket, and at least three fastening devices. The tank includes an outer wall that defines an internal cavity, and first and second channels extending between first and second opposed outer surfaces of the wall through the cavity. The bracket has first and second protrusions, where the first and second protrusions respectively extend into the first and second channels, respectively. First and second ones of the fastening devices are respectively fastened to the first and second protrusions, respectively, so as to prevent movement of the protrusions out of the channels, thereby securing the bracket to the tank. A third of the fastening devices allows the bracket to be secured to another engine component.