1999 Evinrude "EE" Electric Outboards Service Manual, P/N 787021, Page 16Get this manual
Battery Recommendations Regular service batteries have been designed and optimized to supply the high current for short periods that is needed to run the starter and crank an internal combustion engineDeep-cycle batteries or dual purpose StartingDeep-Cycle batteries have been designed and optimized to supply smaller current for longer periods, and discharge further, using large percentage of their available power on regular basisAll electric outboards should use one or two marine deep-cycle batteriesRefer to Specifications for minimum battery recommendationUsing starting-type battery is not good economic choice, but if marine deep-cycle battery is unavailable and you temporarily substitute conventional marine battery, select one with rating of at least 515 eeA (93 amp-hr -18 e) with 165 minute reserve 80 (2r e)The reserve minutes is the important rating for this applicationRefer to CIVIC Accessories Service Manual for battery service procedures