YAMAHA FX 2003 Service Manual

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Bow down
Turn the grip to A or B and the bow will
go down while the watercraft is on plane.
Bow down puts more of the bow in the
water. This gives the watercraft more “hook,”
which enhances turning performance. This
position will also help the watercraft get up
on plane more quickly.
At higher speeds, however, the watercraft
will have greater tendency to “bow steer”
and follow waves and wakes in the water.
Fuel economy and maximum speed are also
reduced.
EJU01024
Bow up
Turn the grip to C or D and the bow will
go up while the watercraft is on plane.
Bow up puts less of the bow in the water.
There is less water resistance, so straight-
ahead acceleration when on plane and top
speed are enhanced.
In some conditions, however, the water-
craft may tend to “porpoise” (hop in the
water). If the watercraft is porpoising,
choose neutral or bow down.
EJU01967
Handgrip
The handgrip 1 provides a handhold for
boarding the watercraft and for a spotter
when facing rearward.
WARNING@ Do not use the handgrip to lift the water-
craft. The watercraft could fall, which
could result in severe injury.
@
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Yamaha Engine Management
System (YEMS)
This model is equipped with an inte-
grated, computerized management system
that controls and adjusts ignition timing, fuel
injection, engine diagnostics, and the Off-
Throttle Steering (OTS) system.
EJU01786
Multifunction meter
This meter contains the following func-
tions for help and convenience in operating
the watercraft.
1
Tachometer
2
Hour meter/Voltmeter
3
Speedometer
4
Fuel meter
5
Fuel warning indicator
6
Engine overheat warning indicator
7
Speedometer display select switch
8
Hour meter/Voltmeter display select switch
9
Check engine warning indicator
0
Oil pressure warning indicator
CAUTION:@ Do not run the engine for more than
15 seconds when checking the operation
of the meter on land. The engine could
overheat.
NOTE:@
When the engine is started, all displays
light up for 2 seconds and the buzzer
sounds 2 times. Then, the meter starts to
operate normally.

The current display will continue to oper-
ate for 25 seconds after the engine stops.
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Tachometer
The engine speed (r/min) is displayed by
segments. Each segment indicates a 250 r/min
increment.
EJU01788
Speedometer
The meter shows the watercraft speed
against water.
NOTE:@ To switch the speedometer display between
kilometers and miles, push the speedometer
display select switch 1 for at least 2 seconds.
EJU01789
Fuel meter
The fuel meter is provided for convenient
fuel level checking while riding. The fuel
meter has eight segments which show the
amount of fuel remaining in the fuel tank.
NOTE:@ The fuel level is most accurate when the
watercraft is sitting level on a trailer or in the
water.
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Hour meter/Voltmeter
NOTE:@ To switch the display between the hour
meter and voltmeter, push the hour meter/
voltmeter display select switch 1 for at least
2 seconds.
Hour meter
The hour meter is provided to make it
easy to follow the maintenance schedule.
The meter shows the hours of engine
operation that have elapsed since the water-
craft was new.
Vo l t m e t e r
The voltmeter is provided to display the
voltage of the battery.
The voltmeter displays 12 volts or more
when the battery voltage is within specifica-
tion.
If the voltage displayed is low, beach the
watercraft and, if necessary, have a Yamaha
dealer check the charging system.
EJU01791
Check engine warning indicator
If a sensor malfunction or a short circuit is
detected, the warning indicator begins to
blink and the buzzer sounds intermittently.
If this occurs, reduce the engine speed,
beach the watercraft, and have a Yamaha
dealer check the engine.
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Fuel warning indicator
If the fuel remaining in the tank drops to
about 13 L (3.4 US gal, 2.9 Imp gal), the
lowest fuel level segment and the fuel warn-
ing indicator begin to blink, and the buzzer
sounds intermittently.
If this occurs, fill the fuel tank at the first
opportunity.
EJU01793
Oil pressure warning indicator
If the oil pressure does not rise to specifi-
cation, the oil pressure warning indicator
come on and the buzzer begins to sound
continuously. At the same time, the engine
speed reduction control is activated.
If this occurs, reduce the engine speed,
beach the watercraft, and have a Yamaha
dealer check the oil pressure.
NOTE:@ Press any button on the multifunction meter
to stop the buzzer.
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Engine overheat warning indicator
This model is equipped with an engine
overheat warning system.
If the engine starts to overheat, the over-
heat warning indicator blinks for 5 seconds,
and then it comes on. The buzzer also
begins to sound intermittently, and then it
sounds continuously. At the same time, the
engine speed reduction control is activated
when the engine runs over 3,000 r/min.
If this occurs, immediately reduce the
engine speed and beach the watercraft, and
check for water discharge at the port (left)
cooling water pilot outlet. If there is no dis-
charge of water, check the intake grate and
impeller for clogging.
WARNING@ Before attempting to remove weeds or
debris from the intake grate or impeller,
shut the engine off and remove the clip
from the engine shut-off switch. Severe
injury or death could result from coming
in contact with the rotating parts of the
jet pump.
CAUTION:@ If you cannot locate and correct the
cause of the overheating, consult a
Yamaha dealer. Continuing to operate at
higher speeds could result in severe
engine damage.
NOTE:@ Press any button on the multifunction meter
to stop the buzzer.
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Storage compartments
A front storage compartment, a glove
compartment, and seat storage compart-
ments are provided.
NOTE:@
Make sure that the storage compartments
are properly secured before operating the
watercraft.

The storage compartments are not
designed to be waterproof. If you carry
objects that must be kept dry, such as the
manuals, put them in a waterproof bag.
EJU01795
Front storage compartment
The front storage compartment 2 is
located at the bow.
To open the front storage compartment,
pull the hood release lever 1 up, and then
open the hood.
To close the front storage compartment,
push down on the rear of the hood until it
latches securely.
NOTE:@ Make sure that the front storage compart-
ment is properly secured before operating
the watercraft.
Front storage compartment:
Capacity: 75.0 L
(19.8 US gal, 16.5 Imp gal)
Load limit: 5.0 kg (11 lb)
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Glove compartment
A glove compartment 2 is located in front
of the seat.
To open the glove compartment, slide the
latch 1 toward you, and then lift up the lid.
To close the glove compartment, push the
lid down until it locks securely.
NOTE:@ A removable beverage holder 3 is provided
in the glove compartment.
Do not use the beverage holder when oper-
ating the watercraft.
Glove compartment:
Capacity: 10.0 L (2.6 US gal, 2.2 Imp gal)
Load limit: 1.0 kg (2.2 lb)
EJU01797
Seat storage compartment
The seat storage compartment 1 is
located under the rear seat.
To open the seat storage compartment,
remove the rear seat. (See page 2-5 for rear
seat removal and installation procedures.)
Seat storage compartment:
Capacity: 15.0 L (4.0 US gal, 3.3 Imp gal)
Load limit: 9.0 kg (19.8 lb)
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OPERATION
Fuel and oil ............................................... 3-1
Gasoline ................................................. 3-1
Engine oil ................................................ 3-3
Filling the fuel tank ................................. 3-4
Pre-operation checks .............................. 3-5
Pre-operation check list ......................... 3-5
Pre-operation check points .................... 3-6
Operation ................................................ 3-16
Engine break-in .................................... 3-16
Launching the watercraft ..................... 3-17
Starting the engine ............................... 3-18
Stopping the engine ............................. 3-20
Leaving the watercraft ......................... 3-20
Operating your watercraft .................... 3-21
Getting to know your watercraft ........... 3-21
Learning to operate your watercraft .... 3-21
Riding watercraft with passengers ...... 3-22
Starting the watercraft .......................... 3-23
Boarding and starting in deep water ... 3-25
Capsized watercraft ............................. 3-27
Turning the watercraft .......................... 3-29
Stopping the watercraft ........................ 3-31
Beaching the watercraft ....................... 3-32
Docking the watercraft ......................... 3-32
Reverse on waterways ........................ 3-33
Rough water operation ........................ 3-33
Post-operation checks ......................... 3-34
Transporting .......................................... 3-36
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Fuel and oil
This watercraft is equipped with a
4-stroke engine. Conventional 2-stroke
engine oil cannot be used.
The engine utilizes an electronic fuel
injection system to deliver the optimal air-
fuel mixture ratio required by the engine.
With optimal combustion conditions, this
system is able to increase startability and
improve fuel economy.
EJU19112
Gasoline
WARNING@ GASOLINE AND ITS VAPORS ARE
HIGHLY FLAMMABLE AND EXPLOSIVE!

Do not smoke when refueling, and
keep away from sparks, flames, or
other sources of ignition.

Stop engine before refueling.

Refuel in a well-ventilated area with
the watercraft in a horizontal position.

Do not stand or sit on the watercraft
while refueling in case of fire.

Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with
dry rags. Always properly dispose of
gasoline-soaked rags.

Avoid overfilling the fuel tank. Stop fill-
ing when the fuel level reaches approx-
imately 50 mm (2 in) from the top of the
fuel tank. Fuel expands as it warms up
and could overflow if the fuel tank has
been overfilled. If temporarily leaving
the watercraft with a full fuel tank, do
not leave it in direct sunlight. Leave it
in a well-ventilated area with the water-
craft in a horizontal position.
UF1B71.book Page 1 Tuesday, November 12, 2002 4:17 PM