Abstract: A wheeled body member is arranged to be attained to the bow of a boat and such body member has two positions one of which holds the wheeled support in a raised position allowing normal operation of the boat and the other of which holds the wheeled support in a lowered ground engaging position. The body member has a hitch so that it can be releasably secured to a towing vehicle. A brake mechanism is provided to prevent rearward rotation of the wheel when desired. In one embodiment, mounting arms are employed having releasable ball-type connectors which permit them to be readily removed from the boat. This embodiment has adjustments adapting it to different sizes and shapes of boats.