Abstract: A rigid metal support arm is pivotally mounted at its lower end in a bracket secured to an appropriate external structure, such as a trailer hitch, on a vehicle. The bracket has a metal channel affixed to extend upwardly at an angle from the vertical to receive the lower end of the pivoted support arm that is secured in the channel with a locking pin or the like. The upper end of the support arm is angled backward in the opposite direction and supports a flat metal plate that is covered on both sides with attached flat wooden sheets to serve like a transom for attaching the clamps of an outboard motor. With the locking pin removed, the arm can be pivoted out of engagement in the channel and downwardly to permit the clamps to be attached to the transom while the motor rests on the ground. With the motor attached, the arm is pivoted upwardly to be locked in position in the channel so that the weight of the motor is over the support bracket.