Final version here: http://www.simply3d.co.nz/kwikjet
To build this boat, follow the instructions for version 2: https://www.youmagine.com/designs/3d-printed-jet-boat-v2
Print all parts from V2, but use the hull from here. Everything is compatible between version 2 and 3. Lid, nozzle, impeller etc.
This is the 3rd and final release of this project I think (4 different versions were actually made, but the first one was never released).