1993 Johnson Evinrude "ET" 2 thru 8 Service Manual, P/N 508281, Page 254Get this manual
Battery Specifications All batteries should be of heavy duty, marine constructionThe battery must be vented, refillable typeA deep-cycle battery must not be used as the engine's cranking batteryFor best performance, OMC recommends you use 12-volt battery with minimum rating of 350 cold cranking amps (CCA) at (70 amphrsat -18 C) and 100 minutes reserve capacity at 80 (27 C)Battery Testing
ill handled with
I.ABattery electrolyte is an acidic solution and should be
careIf electrolyte contacts any part of the body, immediately flush the exposed area with liberal amounts of water and seek medical aid as soon as possible
1Visual Inspection The first step in determining the condition of battery should be visual inspectionLook for conditions such as damage to the case, loose terminals 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 electrolyte