Honda BF15D Owner's Manual page 39

Battery Terminals
( ＋ ) TERMINAL
−
( ) TERMINAL
BLACK or GREEN
Connect the positive (+) battery cable
to the positive (+) battery terminal,
then connect the negative (-) battery
cable to the negative (-) battery
terminal.
The negative (-) battery cable should
always be removed from the battery
when connecting or disconnecting
the positive (+) battery cable, so tools
cannot cause a short circuit if they
touch a grounded part while being
used on the positive (+) battery
terminal fitting.
Be caref ul to avoid connecting the
battery in reverse polarity, as that
will damage the battery-charging
system in the outboard motor.
RED
INSTALLATION
37