1997 Johnson Evinrude "EU" 9.9 thru 30 2-Cylinder Service Manual, P/N 507263, Page 309Get this manual
4Remove pinion and base
[]] INote Before disassembly, scribe marks on frame and end
caps for reference during reassembly
5Remove 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