Prop won't spin. Head turns but prop won't. With the prop off, the prop shaft is difficult to turn by hand. It will rotate a little with some significant effort and then stick at which point it takes a lot more effort to turn and if I try rotating it the opposite direction it is extremely hard to turn. With the power on snd set to high continuous, if I try to rotate the shaft it will slip and start to turn for a few rotations and then bind up. Does this sound like water intrusion. I see no signs of water damage externally.