Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 217Get this manual
SHIFT LINKAGE
5Remove shift lever (a)6Remove detent ball (b) and spring (c)
ReassemblyInstallation
1Lubricate detent spring (a) and ball (b) with 24C with Teflon Marine Lubricantand install ball and spring in cavity (c) as shown2Install two Orings (d) on shaft of shift lever (e)Coat shaft and Orings with 24C with Teflon Marine Lubricant and install shift lever57239