2003 YAMAHA FX battery

2-4
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1Air filter case
2Water separator
3Fuel tank
4Battery
5Flush hose connector
Use to flush the engine cooling water pas-
sages.
6Electrical box
Protects electrical components from water.
7Oil tank8Muffler
9Spark plugs/Spark plug caps
0Spark plug lead
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EJU01790
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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EJU01346
Pre-operation checks
EJU01347
Pre-operation check list
Before operating this watercraft, perform the checks in the following check list. See the
accompanying text in this chapter for details on how to perform the checks.
WARNING@ If any item in the pre-operation check list is not working properly, have it inspected
and repaired before operating the watercraft, otherwise an accident could occur.
@
NOTE:@ Pre-operation checks should be made thoroughly each time the watercraft is used. This pro-
cedure can be completed in a short time. It is worth the time spent to assure safety and reli-
ability.
@
ITEM ROUTINE PAGE
Engine compartment Remove all seats to ventilate engine compart-
ment. Check for fuel vapors or loose electrical
connections3-6
Bilge Check for water and fuel residue and remove if
necessary3-9
Throttle Check that the throttle lever springs back 3-12
Steering system Check for proper steering system operation 3-12
Shift lever and reverse gate Check for proper operation 3-13
Fuel Check fuel level and add if necessary
Check hoses and tank for leakage3-6
Engine oil Check oil level and add if necessary 3-7
Water separator Check for water and drain if necessary 3-8
Battery Check electrolyte level and battery condition 3-10
Front and rear seats Check that the seats are properly secured 2-5, 6
Hull/Deck Check the hull and deck for cracks or other dam-
age—
Jet unit Check for debris and remove if necessary 3-14
Fire extinguisher Check the condition and replace if necessary 3-11
Engine shut-off cord Check condition and replace is frayed or broken 3-14
Switches Check the start switch, engine stop switch and
engine shut-off switch for proper operation when
the watercraft is in the water3-15
Cooling water pilot outlet Check that water is discharged while the engine
is running and the watercraft is in the water3-15
Multifunction meter Check for warning indications and proper opera-
tion3-15
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EJU01969
Battery
Check the battery condition and the elec-
trolyte level.
Check that the battery leads are tightened
securely and there is no corrosion on the
battery terminals.
WARNING@
The battery must always be fully
charged and in good condition. Loss
of battery power may leave you
stranded. Never operate the watercraft
if the battery does not have sufficient
power to start the engine or if it shows
any other signs of decreased power.

Be sure to connect the breather hose
to the battery. Fire or explosion could
result if the breather hose is damaged,
obstructed, or not connected properly.
@
Make sure that the battery is securely
held in place.
1
Positive (+): Red lead
2
Negative (–): Black lead
3
Breather hose
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2. Attach the clip 1 to the engine shut-off
switch 2. Also, attach the engine shut-
off cord 3 to your left wrist.
WARNING@ Check that the engine shut-off cord is not
frayed or broken, and keep it free from
the handlebars so the engine stops if the
operator falls off. The engine shut-off
cord may not pull free if wrapped around
the handlebars when the operator falls
off, allowing the watercraft to continue to
run and cause an accident.
NOTE:@ It is not possible to start the engine with the
clip removed from the engine shut-off
switch.
3. Push the start switch (green button).
NOTE:@ The engine will not start if the throttle lever is
squeezed.
4. Release the start switch as soon as the
engine starts to run.
CAUTION:@
Never push the start switch while the
engine is running.

Do not operate the start switch for
more than 5 seconds, otherwise the
battery will be discharged and the
engine will not start. Also, the starter
motor may be damaged. If the engine
does not start in 5 seconds, release
the start switch, wait 15 seconds, and
then try again.
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4
EJU01086
MAINTENANCE AND
CARE
Storage ...................................................... 4-1
Flushing the cooling system .................. 4-1
Lubrication .............................................. 4-3
Fuel system ............................................ 4-4
Battery .................................................... 4-5
Cleaning the watercraft .......................... 4-6
Maintenance and adjustments .............. 4-7
Owner’s/Operator’s Manual and
tool kit ..................................................... 4-8
Periodic maintenance chart ................... 4-9
Inspecting the fuel system ................... 4-10
Changing the engine oil ....................... 4-11
Checking the air filter element ............. 4-13
Inspecting the jet thrust
nozzle angle ......................................... 4-14
Inspecting the shift cable ..................... 4-14
Inspecting and adjusting the
throttle cable ......................................... 4-14
Inspecting the QSTS mechanism ....... 4-15
Cleaning and adjusting the
spark plugs ........................................... 4-16
Lubrication points ................................. 4-18
Inspecting the battery .......................... 4-21
Adjusting the fuel injection system ...... 4-23
Replacing the fuse ............................... 4-24
Specifications ........................................ 4-25
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EJU01970
Battery
If the watercraft will not be used for more
than a month, disconnect the negative (–)
lead first, then the positive (+) lead and
breather hose, and then remove the battery
from the watercraft.
Clean the battery casing using fresh
water.
If the battery terminals are dirty or cor-
roded, clean them with a wire brush.
Fully charge the battery, and then store it
in a cool, dark place.
Apply Yamaha marine grease or Yamaha
grease A to the battery terminals.
Check the battery at least every 2 months
and fully charge it if necessary.
WARNING@ Be sure to connect the breather hose to
the battery. Fire or explosion could result
if the breather hose is damaged,
obstructed, or not connected properly.
@
CAUTION:@ The battery may not be usable again if
you store it for a long period without
charging it. Charge the battery periodi-
cally.
@
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NOTE:@ The condition of the battery can be known
by checking the specific gravity of the elec-
trolyte. However, you can also know the con-
dition of the battery by measuring the
voltage at both battery terminals. Charge
the battery if the voltage is less than
12 volts.
It is recommended to have a Yamaha dealer
check the specific gravity and to charge the
battery. If you maintain the battery yourself,
be sure to read and follow the instructions
provided with the battery tester and charger
you use.
@
EJU01093
Cleaning the watercraft
Clean the watercraft before storing it for a
long period.
1. Wash down the hull, handlebars, and
drive unit with fresh water.
2. Rinse the engine and bilge area with
fresh water. Drain off all water and wipe
up remaining moisture with clean, dry
rags.
3. Spray the engine’s exterior with a rust
inhibitor and lubricant.
4. Wax the hull with a non-abrasive wax.
5. Wipe all vinyl and rubber components,
such as the seat and engine compart-
ment seals, with a vinyl protectant. Specific gravity (for reference):
1.28 at 20 °C (68 °F)
UF1B71.book Page 6 Tuesday, November 12, 2002 4:17 PM