1991 Johnson Evinrude EI 60 Loop V Models 150, 175 outboards Service Manual, Page 228Get this manual
Cleaning and Inspection 11411Inspect the brushes; replace if damaged, cracked, or one-half wornReplace brush springs, if weak2Clean the commutator with 300-grade emery clothIf commutator surface is unevenly worn or pitted, turn it on latheRemove any trace of oil or metal dust from commutator1,5l11613Check the armature on growler for shorted turnsCheck for grounding by using test light or meterInspect armature insulation for indications of overheating or damaged windingsClean off any carbon deposits or foreign matter which may contribute to later windings failurer:j7l4Check permanent magnetsMagnets should strongly attract any steel or iron object held inside frameWeak magnets could cause excessive RPM on No load Current Draw, Electric Starter test5If the pinion does not properly engage the flywheel, the pinion and shaft may be worn, distorted or dirty6Inspect and replace end cap thrust washer if distorted or worn excessively7Inspect and replace starter O-ring if cut or nicked8Inspect and replace armature shaft snap ring if worn or distorted