2007 Evinrude E-Tec 75, 90 HP outboards Service Manual, Page 35Get 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 tableModels 75 90 Evinrude E-TEC to 10 Ft(.3 to m) Gauge 11 to 15 Ft(3.4 to 4.6 m) Gauge 16 to 20 Ft(4.9 to 6.1 m) Gauge
IMPORTANT: Inadequate battery cables can
affect the performance of an outboard's high amperage start circuit and the cranking speed of the outboardDO NOT use aluminum wire cablesUse ONLY AWG stranded copper wire cables
Battery Switches and Multiple Batteries
A multiple battery setup, including marine battery selector switches, can provide flexibility in single and dual outboard installationsRefer to Battery and Switch Wiring Diagrams on p37 for various battery connection optionsThe battery selection function can be used for emergency starting if primary battery becomes dischargedThe OFF position of the battery selector switch can be used to minimize battery discharge during periods of non-use