M_Boats: Honda 2hp Long or Short Shaft

Hello, I know this topic has been discussed before but does anyone have experience with a Honda 2hp short shaft on an M15 with a fixed mount? I am looking for a Honda 2hp and the only one I could find used in my area was a short shaft. I will be sailing in fresh and saltwater. I am concerned the short shaft will come out of the water on the rough days on Puget Sound. (By the way if anyone has a Honda 2HP they want to sell, please let me know now) Thanks, Moti "The Wake"