I have a 1986 9.9 mercury outboard. I took it out for the first time on friday. It started fine then I put it into forward gear and it started banging around and smokin we didn't make it too far. I then shut the motor off, we let the kids swim for awhile then restarted the motor we now only have neutral and reverse. I put the motor on the workbench, when you turn the throttle to reverse the prop is in gear and does not move, in forward the prop spins freely any help would be great...