An improved railroad coupler mount for attaching equipment, such as an end-of-train device (EOT), marker light, test gear, etc., to a railroad coupler. The mount is comprised of a pivoting lever with brace (a V- or U-shaped notch) that grips the rib between vertically spaced coupler coring holes and a lever tip that contacts the inner wall of the coupler top coring hole, a pad that bears against the exterior face of the coupler guard arm side and a mechanism that forcibly pivots the lever tip towards the pad on an axis roughly parallel to the coupler axis.