Cold Winter evenings are the time to work on old outboards so they will be ready to run when warmer weather arrives. Congrats on getting a "complete and
original" but that may not mean functional. Checking and TLC will not make
it less "complete and original" but will go a long way toward ensuring motor
will start, pump and run.
I seldom buy anything better than "stuck, broken and missing" so maybe my
view is less rosy.