Abstract: A cooling system for a water-borne vessel (1) is disclosed. The system comprises a strut (5) for supporting a propeller shaft (4) of the vessel, the strut (5) comprising a fluid inlet (8), a fluid outlet (9), and a channel (10) inside the strut (5) for transporting fluid between the fluid inlet and fluid outlet, one or more fluid conduits coupling the fluid inlet and outlet to a component to be cooled, and a pump for circulating a fluid through the conduits and said channel.

Abstract: A mount for a boat propulsion unit comprises a collar for mounting around an aperture in a boat's hull, the collar having an annular groove on an inner surface thereof; a first mating part for mounting an inboard portion of a propulsion unit to the boat; and a second mating part, connectable to the first mating part, for mounting an outboard portion of a propulsion unit to the boat. The first and second mating parts are connectable through the collar and are configured such that when they are connected they form an external annular recess in an outer surface and an annular gasket is located partly in the groove and partly in the recess to form a seal there-between.