I HAVE A 40hp EvinrudeTE40FLENM that I am trying to change the impeller and I ran into trouble. ... I removed all the bolts (5) and the lower unit dropped down a bit but wouldn't drop on down. .. It's lose and will move up and down easily and go "CLUNK CLUNK CLUNK". ... Something is holding the darned thing from coming off. .... Can anyone help me. ..... THANKS!!. .... ted