A snow thrower comprising: a frame ; a prime mover supported by the frame ; a handle assembly coupled to the frame, the handle assembly including a grip for an operator to grasp; an auger housing supported by the frame ); an auger blade rotationally coupled to and disposed within the auger housing ; and a track drive system coupled to the frame to facilitate movement along a ground surface, the track drive system including a drive wheel rotatably driven by the prime mover , an idler wheel , and a flexible track interconnecting the drive wheel and the idler wheel , wherein the idler wheel is movable relative to the ground surface between a first position, in which a lowermost section of the flexible track extending between the drive wheel and the idler wheel is generally parallel to the ground surface, and a second position, in which the idler wheel is moved downwardly relative to the ground surface such that the drive wheel is spaced away from the ground surface, to tilt the frame forward to increase an amount of snow thrower weight supported by the auger housing ; and characterized in that the idler wheel is moveable into a third position, in which the idler wheel is moved upwardly relative to the ground surface such that a small portion of the flexible track engages the ground surface to facilitate maneuvering the snow thrower about the drive wheel ,. a frame ; a prime mover supported by the frame ; a handle assembly coupled to the frame, the handle assembly including a grip for an operator to grasp; an auger housing supported by the frame ); an auger blade rotationally coupled to and disposed within the auger housing ; and a track drive system coupled to the frame to facilitate movement along a ground surface, the track drive system including a drive wheel rotatably driven by the prime mover , an idler wheel , and a flexible track interconnecting the drive wheel and the idler wheel , a drive wheel rotatably driven by the prime mover , an idler wheel , and a flexible track interconnecting the drive wheel and the idler wheel , wherein the idler wheel is movable relative to the ground surface between a first position, in which a lowermost section of the flexible track extending between the drive wheel and the idler wheel is generally parallel to the ground surface, and a second position, in which the idler wheel is moved downwardly relative to the ground surface such that the drive wheel is spaced away from the ground surface, to tilt the frame forward to increase an amount of snow thrower weight supported by the auger housing ; and characterized in that the idler wheel is moveable into a third position, in which the idler wheel is moved upwardly relative to the ground surface such that a small portion of the flexible track engages the ground surface to facilitate maneuvering the snow thrower about the drive wheel ,. a first position, in which a lowermost section of the flexible track extending between the drive wheel and the idler wheel is generally parallel to the ground surface, and a second position, in which the idler wheel is moved downwardly relative to the ground surface such that the drive wheel is spaced away from the ground surface, to tilt the frame forward to increase an amount of snow thrower weight supported by the auger housing ; and characterized in that the idler wheel is moveable into a third position, in which the idler wheel is moved upwardly relative to the ground surface such that a small portion of the flexible track engages the ground surface to facilitate maneuvering the snow thrower about the drive wheel ,. <EOS>