Abstract: A vibration-isolating mount for heavy machinery, such as bus engines, large electrical motors, and similar rotating machinery, comprising a first soft urethane body having fan annular shoulder which rests on the surface of the vehicle frame and a cylindrical neck which has an axial length that extends into a hole in the frame. The mount also has a second soft urethane body having an annular shoulder which rests on the opposite surface of the frame and a cylindrical neck which has an axial length that extends into the hole from the opposite surface of the frame. The axial length of the neck of the first body is substantially less than the axial length of the neck of the second body with a total length of the first neck and the second neck being equal to the axial length of the hole in the frame. The mount additionally has a hard urethane sleeve for adding rigidity to the first and second bodies.