Abstract: A centrifugal water pump especially adapted for fish and live bait live wells in which the pumping chamber is horizontally oriented and such chamber has two wall portions or sectors of different radii, one wall portion having a radius substantially the same as the outermost radial path of the impeller blades of the impeller and the other wall portion being substantially greater, such wall portions being connected by spaced walls, one of the walls being located immediately adjacent the upwardly extending passageway of the outlet of the pump. In the preferred embodiment, a divider wall is located and extends longitudinally in the passageway of said outlet dividing said passageway into two passageways.

Abstract: A fuel tank vent for venting air and fumes from a fuel tank of a boat, said vent including an outer and inner restraining means for restraining the flow of water and other foreign material from passing through said vent and contaminating the fuel in the tank. Each of said inner and outer restraining means include a unique structure in and of itself and in combination for causing said water and foreign material to take a tortuous path and to be trapped prior to reaching the fuel tank.

Abstract: A splash resistance gas vent for venting the fuel tank of a boat includes a body having a bore extending therethrough and a baffle positioned perpendicular to the bore. An annular opening is provided around the baffle and a sloping deflection surface is provided in alignment with the opening and around the bore. A surface between the deflection surface and the opening conducts water entering the opening back out the opening. Additional means, such as a screen mesh over the bore and an enlarged portion of the bore, further inhibit water from entering the fuel tank.

Abstract: A multi-bladed marine propeller designed for efficient operation in intermediate, partially cavitating flow regions between fully cavitating flow and noncavitating flow. Each of the blades has a radially inner subcavitating section and an outer section which is configured to have a higher angle of attack and tapered trailing and leading edges so that it supercavitates at high speeds either with or without ventilation and subcavitates at low speeds. Various other features of each blade include different length chords on the pressure and suction sides of the outer section and an inclined trailing surface area extending between the chord ends for improved off design, design point, and astern operation. A minimized transition area is included between the inner and outer sections, and narrow chord lengths are provided in the tip area to minimize and balance overall tip section drag.