Re: 1960 5.5hp Johnson Base Gasket Part#? CD-17 Home › Forum › Ask A Member › 1960 5.5hp Johnson Base Gasket Part#? CD-17 › Re: 1960 5.5hp Johnson Base Gasket Part#? CD-17 MumblesReplies: 5764Topics: 298 May 10, 2018 at 10:34 pm #75722 313065 is the P/N for the correct base gasket while 303391 is the carbon bearing, or seal. Attachments: