1990 Johnson Evinrude "ES" 60 thru 70 Service Repair Manual, P/N 507873, Page 228Get this manual
Quality of the image is intentionally reduced!
Cleaning and Inspection 1 Inspect the brushes; replace if one-half worn, damaged, or cracked Replace brush springs, if weak2 Clean commutator with 300 grade emery clothIf commutator surface is unevenl