1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 231Get this manual
Charging System Check ChartAll Models
Where to Look Battery
Cause 1Battery defective or worn out 2Low electrolyte level 3Terminal connections loose or corroded 4Excessive electrical load 1Connections loose or corroded 2Stator leads shorted or grounded 3Circuit wiring grounded 1Damaged stator windings
Procedure 1Check condition and charge 2Add water and recharge 3Clean and tighten
Reference All Steps See Pages 8-4 thru 8-7