Probably Not
the thrust ultimately depends on the diameter of the prop, the pitch, power and rpm's of the engine. When you instal the Venturi around it it may improve your directional maneuverability, but not the thrust. One thing that I really liked on may boat , long time ago when I had a small power boat , was the instalation of an aerofoil wing, just above the prop. It improved the planning speed and ability to "get out of the hole", especially if the boat is loaded with weight.Hope this helps....