Abstract: An attachment for use with a boat trailer previously equipped with an upstanding post secured to a trailer tongue, and a winch with a rope mounted near the upper end of said post. The attachment includes a third class lever pivotally connected at the forward end to a shackle secured to the trailer tongue, and further supported and horizontally restained near the rearward end of the lever by a support shackle also secured to the trailer tongue, the free rearward end of the lever terminating in a bracket with a roller supporting the forward keel of a boat in transit. The winch rope end may be secured between ends of the lever so that operation of the winch causes the lever to move vertically upwards, from its support position, in an arc centered at the lever pivotal connection.