2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 45Get this manual
Maintenance and Tune-Up: Connecting Battery CAUTION If the battery leads are loose, incorrectly connected or reversed, the electrical system could be damaged Wing nuts must not be used and hexagon nuts must be used to secure sub battery cable to the battery terminals to avoid loss of electrical powerHow to connect 1) Connect positive (+) terminal first2) Connect negative () terminal second3) Upon completion of connection, lightly apply grease to battery terminals1 3
Battery Solution Level Check CAUTION Once the battery has been initially serviced, NEVER add diluted sulfuric acid or battery damage will occurFollow the battery manufacture's instructions for specific maintenance proceduresBattery solution level should be between UPPER level and LOWER levelIf level is low, add distilled water only