This is a motor mount drilled and tapped to fit the O.S. (2-stroke) 40SF, 40SF-S, 46SF, 46SF-S, 40VF, 46VF Includes all hardware necessary for mounting the engine to a firewall and mounting the engine to the engine mount. The nose gear hole is not pre-drilled INCLUDES: Four M3.5x16 engine mounting screws (secures the engine to mount) Four lock washers (for the engine mounting screws) Four blind nuts (they fit into the firewall) Four M4x20 motor mount screws (secures the mount to firewall) One L-wrench for the screws SPECS: Type of Material: All Aluminum mount with Steel screws and washers Type of Mount: Beam style mount with a square shaped back Overall Length: 66.5mm (2.6") Overall Width: 55.7mm (2.2") Height: 55.2mm (2.2") Useable Beam Length: 44mm (1.7") Width from center of mounting hole to center of mounting hole: 44mm Distance from the back of mount to center of mounting holes: 36mm (1.4") rear hole 53.5mm (2.1") front holeOS EnginesPart OSM71913100