Seals for that shift shaft will often be incorporated with Mercury gear housing kits much like the a single we used in the movie below, which also came with enter and output seals to the lower unit, along with a new gasket with the change shaft housing. Way too undesirable https://dockside-boat-mechanic-in09529.bloggerbags.com/36850724/not-known-details-about-repair-boat-lower-unit-fin