1997 Johnsoon Evinrude "EU" 50 thru 70 3-Cylinder Service Manual, P/N 507266, Page 246Get this manual
[1J 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 weak
2Clean 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
3Check the armature on growler for shorted turnsCheck armature for grounding by using test light or meterInspect armature insulation for indications of overheating or damaged windingsClean off any deposits of carbon or foreign matter which may contribute to later failure of the windingsor iron objects held inside the frameWeak magnets will cause excessive RPM on No Load Current Draw, Electric Starter testinstalledThe cleaning agent could drain into the starter, washing dirt from the drive into the bearings and commutatorAfter disassembling, clean each part with grease solvent and inspect6If the pinion does not properly engage the flywheel, the pinion and screw shaft assembly may be worn, distorted, or dirtyLocate the cause and correct before completing assemblyAssembly