Gasoline; Engine Oil; Battery Requirement; Battery Specifications - Yamaha 40V Owner's Manual

General information
EMU25580

Gasoline

Recommended gasoline:
Regular unleaded gasoline with a min-
imum octane rating of 90 (Research
Octane Number).
If knocking or pinging occurs, use a different
brand of gasoline or premium unleaded fuel.
EMU25650

Engine oil

Recommended engine oil:
YAMALUBE 2-stroke outboard motor
oil
If the recommended engine oil is not avail-
able, another 2-stroke engine oil with an
NMMA-certified TC-W3 rating may be used.
EMU25690

Battery requirement

ECM01060
CAUTION:
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.
4
EMU25720

Battery specifications

Minimum cold cranking amps (CCA/EN):
40VEO 347.0 A
40VETO 347.0 A
40YETO 347.0 A
50HEDO 347.0 A
50HETO 347.0 A
Minimum rated capacity (20HR/IEC):
40VEO 40.0 Ah
40VETO 40.0 Ah
40YETO 40.0 Ah
50HEDO 40.0 Ah
50HETO 40.0 Ah
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
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.
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 suit-
able as it enables the correct engine speed
to be maintained. Conversely, a larger-pitch
propeller is more suitable for a smaller oper-
ating 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 ap-
plication.