1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 216Get this manual
Battery Specifications INotel All batteries should be of heavy duty, marine constructionThe battery must be vented, refillable type battery that is not fully charged or less than recommended capacity may not crank the engine fast enough to produce ignition component output
60 thru 70
For best performance, OMC recommends 12-volt battery with minimum rating of 360 amps cold cranking at (- 18 C) and 115 minutes reserve capacity rating at 80 (2r C)Battery Testing Battery electrolyte is an acidic solution and should be handled with 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