To build a boat motor stand, use two 2-by-4-by-36-inch boards and two 2-by-4-by-24-inch boards to form the frame, two 2-by-8s to form the uprights on the frame's sides and a 4-by-6 board to form the support rails. Join the pieces appropriately using 3-inch wood screws, and affix casters to the frame's base.
To make the frame of the boat motor stand, place the two 2-by-4-by-36-inch pieces parallel and at a distance of about 24 inches from each other. Mark the 18-inch point from the ends of the pieces, and place the two 2-by-4-by-24-inch pieces on them. Attach the latter two pieces to the cut ends of the former using screws to form a frame with the dimensions 36 by 24 inches.
Using a carpenter's square, adjust the frame's corners, and screw them. Place five 2-by-4-by-24-inch pieces on the frame, and screw them at the ends to the side rails. At the opposite side of the base, affix six casters with capacity of 200 pounds on the 2-by-4-by-36-inch boards.
Now, mark the center point of two 2-by-8 boards, and attach them perpendicularly at the 18-inch mark on either sides of the 2-by-4-by-36-inch boards. Secure a 4-by-6 board to the 2-by-8s at the former's 21 1/2-inch mark. Affix 2-by-4-by-24-inch boards at equal spaces between the uprights.
Finally, mark the 39 1/2-inch point from the upright's center on the base's sides. Align one 2-by-4-by-72 3/4-inch piece with this mark and the upright's side. Attach the piece to the support and the frame's base. Repeat with the second 2-by-4-73 3/4-inch piece, while ensuring that both the pieces slant similarly.