Seals for the change shaft are often incorporated with Mercury gear housing kits such as the a person we used in the video down below, which also came with input and output seals for the lower unit, along with a new gasket to the shift shaft housing. Remanufactured lower units https://marineupholsterykeylargo89000.blogaritma.com/30220663/the-best-side-of-mobile-lower-unit-repair-key-largo