1998 Johnson Evinrude "EC" Accessories Service Manual, P/N 520213, Page 59Get this manual
All Remaining Models:
Install battery terminals (not provided) on the battery posts to make the cable connectionsUse OMC battery terminals, PIN 385407or equivalentOr, place large-surface starwasher over the threaded battery postStack cables from accessories, then cables from the outboardFinish this connection with hex nut, tightened firmly with wrench, and coating of OMC Electrical Grease to help prevent corrosionBattery Testing
& Battery electrolyte is acidic Visual Inspection
handle with careIf electrolyte contacts any part of the body, immediately flush with water and seek medical attention
The first step in determining the condition of battery should be visual inspectionLook for conditions such as damage to the case, loose terminal, and evidence of electrolyte seepageThese signs may indicate improper care, installation, or application of the batteryLook for excessive corrosion on the battery terminals and cablesCheck the battery cables for worn or frayed insulationReplace cables, if necessaryCheck the electrolyte level in each cellIf electrolyte level is below the plates, it is possible the battery is permanently damagedAlso look for dirt, oil, or other contaminants floating in the electrolyte842018