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tric system could perform poorly or be
overloaded, causing electric system dam-
age.
For electric start models, choose a battery
which meets the following specifications.
EMU25711
Battery specifications
EMU25730
Without a rectifier or Rectifier
Regulator
CAUTION:
ECM01090
A battery cannot be connected to models
that do not have a rectifier or Rectifier
Regulator.
If you wish to use a battery with the models
without a rectifier or Rectifier Regulator, install
an optional Rectifier Regulator.
Using a maintenance-free battery with the
above models can shorten the life of the bat-
tery significantly.
Install an optional Rectifier Regulator or use
accessories rated to withstand 18 volts or
higher with the above models. Consult your
Yamaha dealer for details on installing an op-
tional Rectifier Regulator.
EMU25741
Propeller selection
The performance of your outboard motor will
be critically affected by your choice of propel-
ler, as an incorrect choice could adversely af-
fect performance and could also seriously
damage the motor. Engine speed depends on
the propeller size and boat load. If engine
speed is too high or too low for good engine
performance, this will have an adverse effect
on the engine.
Yamaha outboard motors are fitted with pro-
pellers chosen to perform well over a range of
applications, but there may be uses where a
propeller with a different pitch would be more
appropriate. For a greater operating load, a
smaller-pitch propeller is more suitable as it
enables the correct engine speed to be main-
tained. Conversely, a larger-pitch propeller is
more suitable for a smaller operating load.
Yamaha dealers stock a range of propellers,
and can advise you and install a propeller on
your outboard that is best suited to your appli-
cation.
Minimum cold cranking amps
(CCA/SAE):
T8PRD 245.0 A
T8PHD 245.0 A
T8EHD 245.0 A
Minimum marine cranking amps
(MCA/ABYC):
T8PRD 323.0 A
T8PHD 323.0 A
T8EHD 323.0 A
Minimum reserve capacity (RC/SAE):
T8PRD 52 minutes
T8PHD 52 minutes
T8EHD 52 minutes
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
U60R10E0.book Page 11 Monday, June 21, 2004 9:34 AM