1971 Evinrude StarFlite 100 HP Outboards Service Manual, PN 4753, Page 87Get this manual
7-8 cRemove drive end head, taking care to avoid damaging bearing in headdRemove commutator head by tapping lightly with rubber malletRemove brushes and spring from holderLift armature from frame and field assemblySee Figure 7-4
CLEANING, INSPECTION AND REPAIR
aInspect the brushes; replace if one-half worn, damaged, or crackedReplace brush springs if weakFigure 7-5Starter Motor Test bClean commutator with Grade 00 sandpaperIf commutator surface is unevenly worn or pitted, turn on latheRemove any trace of oil from commutatorcCheck the armature on growler for shorted turnsSee Figure
7 -7 Check armature for grounding by using test light or meterSee