slow pee stream coming from motor

You may never know how the key got out of place. We can speculate all day long how it happened. What you take from this is, you will be very aware from here on out to pay close attention as you instal your next impeller. Good thing is you're back pumping water. Go enjoy the boat.
 
Just want to send out a special thank u to ky grady and all that have helped with this problem. this is one great forum ,and the advice that everyone gives is priceless !! thank u all