long or short shaft?
You don''t state the location of your sailing venue. If you are mostly subject to light chop (less than 2'') the forward location (in the well) may reduce the hobby horse action enough to keep the prop in contact with the water at all times.
If not, I would suggest experimenting by running across the stern wake of a large power boat in calm wind conditions. Few things are more dangerous than cavitating an outboard auxiliary on a lee shore!!! I have watched a couple of hot race competent skippers with lightweight OB''s fall into this trap.
As I often singlehand in sloppy conditions, the longer the shaft - the better!!