Yamaha F40C Manuel D'utilisation page 22

EMU01775
BATTERY REQUIREMENT
cC
Do not use a battery that does not meet
the specified capacity. If a battery which
does not meet specifications is used, the
electric system could perform poorly or
be overloaded, causing electric system
damage.
For electric start models, choose a battery
which meets the following specifications.
EMU01857
Minimum cold
(CCA/EN): 430 amps at -18°C (-0.4°F)
Minimum rated capacity (20HR/IEC):
70 A·h
EMU01395
PROPELLER SELECTION
The performance of your outboard motor
will be critically affected by your choice of
propeller, as an incorrect choice could
adversely affect 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.
1-7
GB
cranking amps