2008 Evinrude E-TEC 55MFE Technical Manual, Page 28Get this manual
INSTALLATION AND PREDELIVERY BOAT RIGGING Battery Cable Requirements EvinrudeJohnson outboards are shipped with stranded copper battery cables for typical installations in which the starting battery is positioned close to the transomSpecialized outboard installations with extended length battery cables require an increased wire sizeRefer to the following table1 to 10 Ft(.3 to m) 11 to 15 Ft(3.4 to 4.6 m) 16 to 20 Ft(4.9 to 6.1 m) Gauge Gauge Gauge Secondary
Used as back-up starting battery under abnormal operating conditionsswitch
Red (+) cable connected to battery selector Secondary battery is charged independently
from primary batteryAccessory Not used as starting battery Isolated from outboard start function No red (+) cable connected to battery selector switch
IMPORTANT: Never connect an external battery
isolator to the stator of an Evinrude outboard