I just bought a used sea nymph with a johnson 50 hp vro. Put in water for the first time saturday and it ran fine. Went out yesterday and was coming out of a no wake zone and accelerated for about 3 seconds and stopped moving. All of a sudden the motor was running fine, but the prop was not turning. What happened??????? Luckily I was able to get towed back to a launch site. This is pretty scary stuff to happen to you, especially toward dusk with the wind picking up. What do I do now?????