I was taking my inflatable up the river and hit an unseen rock. My Suzuki DF 2.5 tilted up as it is supposed to do and then I stopped it to assess the damage. The prop looked okay but when I started it back up and went to put it into Forward, it did not engage the prop . The prop spins freely in neutral when I hand spinned it. When I push the forward lever all the way it makes the slightest grinding noise but does not catch to engage. Any ideas? Thanks