Abstract: A weed cutter mounting system includes a riding lawn mower that includes a front wall, a back wall, a first side wall and a second side wall. A chair is mounted on the riding mower between the front and back walls. A plate is attached to the first side wall of the riding mower adjacent to and below the chair. A post is attached to the plate. A panel has an inner surface and an outer surface. The inner surface of the panel is attached to an outer end of the post. A coupler includes a base portion and a clamp portion. The base portion is rotatably coupled to the panel so that the base may be selectively rotated about an axis of the panel. The clamp portion is attached to the base. The clamp portion is adapted for removably receiving and securing a weed cutter to the riding mower.