1968 Evinrude Ski-Twin, Ski-Twin Electric 33 HP Outboards Service Manual, Page 65Get this manual
Remove three nuts and five screws attaching starter bracket and mounting bracket to crankcaseSee Figure 7-7Lift starter and bracket off bracket studsRemove two thru-bolts from Separate motor from bracketstarter motor DISASSEMBLV OF STARTER
Remove drive end head, taking care to avoid damaging bearing in head teeth or armature pinionRemove commutator head tapping lightly with rubber malletRemove brushes and spring from holderLift armature from frame and field assemSee Figure 7-5disassemble starter drive, remove nut at top of drive housingNote the relative positions of the parts while disassembling to aid in reassembly laterSee Figure 7-8Figure 7-9Checking Armature Growler
CLEANING, INSPECTION, AND REPAIR
Inspect the brushes; replace if one-half worn, damaged, or crackedReplace brush springs if weakClean commutator with Grade 00 sandpaperIf commutator surface is unevenly worn or pitted, turn latheRemove trace of oil from commutatorCheck the armature growler for shorted turnsSee Figure -9Check armature for grounding using test light or meterSee Figure 7-10