Abstract: A main body member is supported by transverse supports on a pair of pontoons. The main body member supports an operator's seat, a cargo rack, a pedal drive propeller assembly, and a rudder. The main body member has longitudinal slots in its surfaces that are associated with longitudinal interior sockets for adjustable engagement with the seat, the cargo rack, a support extension for the pedal drive propeller assembly, and the transverse supports. By means of such adjustable engagement, attachable portions are capable of longitudinal adjustment for establishing the desired trim of the cycle on the water with the operator or operators supported on the seat. Also, the support extension for the pedal drive propeller assembly is capable of longitudinal adjustment to accommodate the stature of the operator or operators after the plane of buoyancy has been established. Furthermore, seat and propeller assemblies for one or two persons are capable of being substituted one for the other.

Abstract: A pair of channel-shaped support members are arranged to be secured in upright position on the stern of a boat in spaced relation. These support members are open at their upper and lower ends with the end edges of such open ends being provided with notches. Strut members which support wheels at one of their ends have pivotal attachment at their other ends to the support members intermediate the ends of the latter. Each of the struts carries a transverse latch pin on it which is movable toward and away from the pivot connection of the struts with the support members and which is urged toward the pivot and by a tension spring. The arrangement is such that the latch pin automatically travels into one or the other of the end notches and locks therein when its strut is moved either to an up non-use position of the wheels or a down use position of the wheels. The end edges of the support members have a cam portion for directing the latch pins into the notches.