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 (14) for a water-jet propulsion unit (16) belonging to a boat (12), which frame (15) includes a flow channel (26) for guiding water to the impeller (24) 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 (24), and a sealing surface (33) forming a closed loop for attaching the water-jet propulsion unit (16) tightly to the counter-sealing surface (32) belonging to the boat (12). 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 (12), in such a way that the maintenance opening (28) of the, frame (15) is situated alternatively inside or outside the stern (44) belonging to the boat (12). 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.