I am a novice boater, so therefore I don't know much about the 2cycle outboard motor I have an 1982 Chrysler force 85 motor. I am wondering how much "slop"should be in my prop when I'm out of the water and in gear? I seem to be able to turn the prop a 60 degrees or so until it catches the gear. I am having an issue with the motor stopping and now power to the prop, and I am wondering if I destroyed something with the dog gear by accidentally hitting some rocks. If so, how hard is it to rebuild a lower end?