1996 Johnson Evinrude "ED" 90 CV 88 thru 115 Service Manual, P/N 507126, Page 226Get this manual
Battery Cable Extension The following are minimum specifications for stranded copper cable without splicesCable measurements given are from the motor to the batteryThe maximum length is 20 ft(6,1 m), regardless of cable diameterINotel These specifications do not apply to aluminum battery cablesOMC does not recommend the use of aluminum battery cablesMinimum Recommended Gauge Total Extended Length Model10 ft(0,3m) 1115 ft(3,44,6 m) 1620 ft(4,96,1 m)