1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 55Get this manual
Brush Replacement STARTER REASSEMBLY 1If brushes were removed, replace as follows: aInstall POSITIVE brushes (along with POSITIVE terminal) into commutator end cap
2If removed, reinstall parts on armature shaftUse new locknut and tighten securely on end of shaft
11660 End Cap POSITIVE Brushes POSITIVE Terminal Insulating Bushing Washer Split Washer Hex Nut Long Brush Lead Push Lead into Slot Locknut Spacer Spring Drive Assembly Drive End Cap Armature Shaft Washer