Frame of a water-jet propulsion unit for a boat, a water jet propulsion unit and an arrangement in a boat

摘要

The invention relates to a frame for a water-jet propulsion unit, which is arranged to be installed and sealed into an installation opening for a water-jet propulsion unit (16) belonging to a boat, which frame (15) includes a flow channel (26) for guiding water to the impeller belonging to the water-jet propulsion unit (16), a maintenance opening (28) located on top of the said flow channel (26), for servicing the impeller, and a sealing surface (33) forming a closed loop for attaching the water-jet propulsion unit (16) tightly to the counter-sealing surface belonging to the boat. The frame (15) includes, in addition, an additional sealing surface (34) for forming a second closed loop arranged to be. used in attaching the water-jet propulsion unit (16) to the boat, in such a way that the maintenance opening (28) of the, frame (15) is situated alternatively inside or outside the stern belonging to the boat. The invention also relates to a corresponding water-jet propulsion unit equipped with the frame of a water-jet propulsion unit, and an arrangement in a boat. The intention of the frame according to the invention is create a frame with the aid of which the same water-jet propulsion unit can be used in both forms of installation of being either in the frame of the water-jet propulsion unit or in the boat or alternatively inside or outside relative to the stern of the boat.