I printed this out of tpu 30 percent infill. I took my old destroyed impeller and removed the rubber leaving just the brass underneath and slide the new printed impeller onto the brass with super glue (not necessary). I used onshape, so you should be able to look up the same title on the public folder and make changes to your application.
33mm_Evinrude_johnson_1979_6hp_water_impeller.stl | 140.1KB |