The engine is unlikely to be effective in any event. The prop on most sailboats is too far ahead of the rudder to throw meaningful amounts of water over the rudder; you're most likely to gain speed with little turning moment generated. A rotating saildrive might do much better. An outboard might work to some effect although the prospect of sail handling, steering, and operating of the outboard simultaneously would seem daunting.
We got into this mess sailing and some form of sailing is surely the best way to get out of it.
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.