We were out tubing yesterday for about an hour or so just changed out tubers and I was just idling in forward and they waved they were ready so went to about 3/4 throttle and boat wouldn't plane out so went little further and heard a loud bang and boat stopped and engine just revved up . Went to nuetral and tried forward again, prop didn't move, trimmed motor all the way up put in gear and you can hear a grinding clicking noise. Finally got boat on trailer and home , started it out in gear and prop tries to spin but it doesn't just kinda moves a little bit . Never full rotation , when engine off and in gear i can move clockwise with little resistance and every 1/4 turn there's a clicking noise , count clock wise no resistance really, any advice or information or anything will be greatly appreciated . Please help me out what do I need to do, remove, check etc. thanks again