1999 Evinrude "EE" Electric Outboards Service Manual, P/N 787021, Page 121Get this manual
Cleaning and Inspection
1Inspectthe brushes, and replace them ifthey are less than 3s in(9 mm) long Replace brush springs if damaged2Clean commutator with 300-grade emery clothIf commutator surface is unevenly worn or pitted, turn it in lathe Remove any trace of oil or metal dust from commutator
W [[] 3Check armature for shorted turns on growlerCheck
armature for grounding using test light or meterInspect armature insulation for indications of overheating or damaged windingsClean off any deposits of carbon or foreign matter which might contribute to later failure of the windings