I have an original owner's manual available for 1964 model year Johnson model CD-21 5.5 horsepower models. I would imagine most of the info within would be pertinent to other 1960s era 5.5s, too. Manual has tape on the bound edge, thumb wear, pen marks, punch holes, etc. Still good for reference.
Asking $20.00, postage in the U.S. included.
E-mail: csr112-n AT twcny DOT rr DOT com