Abstract: A safety light assembly is designed for use with an outboard, motor or the outdrive unit of a motor mounted on a boat which is carried on a trailer being towed by a towing vehicle. The safety light assembly is removably secured to the anti-cavitation plate of the drive housing of the motor or outdrive unit by means of clamps. The assembly includes a housing with a central light-supporting portion between first and second flanges located on opposite sides of the central light-supporting portion. A light is attached to the central light-supporting portion of the housing; and the flanges are removably secured by means of clamps to the anti-cavitation plate on the drive housing of an outboard motor, or outdrive unit. Electrical connectors interconnect the light with a source of electrical energy, which ideally is the lighting system of the taillights of a boat trailer.