Bavaria prop size list shows that the correct 2-blade folder for your boat is a 16 x 13.  3-blade prop is 16 x 11.  So 2-blade should be the same size but deeper pitch.

    2-blade is more efficient, but you get a bit more “grunt” from a 3-blade.

    Personally, I would send it back and get a 3-blade Featherstream from Darglow.