This is a 60mm water jet pump. New Version availible now, with better diffusor, impeller and steering. Called Jet 3.stl Housing is 1 part now.
I deleted all old parts.
I use a 4074 Motor which fits for the motorhalter (motorholder) and cooling sleeve. For the cooling sleeve you need 2 rubberrings 40x3mm. The main shaft is 10mm. I use stainless steel for the shaft and the bearings.