1997 Johnson Evinrude "EU" 40 thru 55 2-Cylinder Service Manual, P/N 507265, Page 277Get this manual
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4Remove pinion and base
Note Before disassembly, scribe marks on frame and end caps for reference during reassembly5Remove the two thru bolts and separate components
Cleaning and Inspection 1Inspect the brushes; replace if one-half worn, damaged, or crackedReplace brush springs, if weak2Clean commutator with 300 grade emery clothIf commutator surface is unevenly worn or pitted, turn on latheRemove any trace of oil or metal dust from commutator