Honda 4 stoke Engine Problem


I have an older Honda 4 stroke Outboart engine - Long shaft for sailboats.
it is stuck in Reverse and I am trying to remove the lower unit does anyone
know how to release the lower shaft on this unit ? Or where I can get an
inexpensive manual on this motor ?

Most appreciative or any assistance.

Honda - 4 stoke
5.0 Electronic Ignition
engine # BF507272