Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 33Get this manual
Starter Motor Reassembly Assemble parts on armature shaftUse new snap ringLubricate bushing in end cap with drop of 10W oilLubricate helix threads on armature shaft with drop of 10Woil
Using pairs of pliers, grip retainer (a) and top of shaft and force retainer up over snap ring
Place snap ring (a) on upper end of armature.shaftUse 12 insocket and tap snap ring down into groove