Yamaha 20D Owner's Manual page 22

EMU01783
cC
A battery cannot be connected to models
that do not have a rectifier or Rectifier
Regulator.
Models without a rectifier or Rectifier
Regulator: 30DMH
8 If you wish to use a battery with the
above models, install an optional Recti-
fier Regulator.
Models with only a rectifier installed:
20DWO, 30DE, 30DEO, 30ETO
8 Using a maintenance-free battery with
the above models can shorten the life
of the battery significantly.
8 Use caution when connecting acces-
sories such as fish finders, as they may
be damaged by high voltage. Install an
optional Rectifier Regulator or use
accessories rated to withstand 18 volts
or higher with the above models. Con-
sult your Yamaha dealer for details on
installing an optional Rectifier Regula-
tor.
1-7
GB