Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 143Get this manual
Shift Shaft 1Inspect sh ift shaft and camReplace com ponents if any of the following exists: Corroded or worn shift shaft splines (both ends) Grooves in shift shaft seal surface Worn shift cam
Shift Shaft Bushing Reassembly and Installation
1Press new oil seal (a) into bushing with lip of seal away from threaded end of bushingInstall new O-ring (b) 2Lubricate lip of seal and O-ring with Quicksilver 2-4-C Marine Lubricant