2006 YAMAHA FX cooling

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2
EJU01007
FEATURES AND
FUNCTIONS
Location of main components .............. 2-1
Operation of controls and other
functions ................................................... 2-5
Rear seat ................................................ 2-5
Front seat ............................................... 2-6
Hood ....................................................... 2-7
Fuel tank filler cap .................................. 2-7
Engine stop switch ................................. 2-7
Engine shut-off switch ............................ 2-8
Throttle lever .......................................... 2-8
Start switch ............................................. 2-9
Cooling water pilot outlet ....................... 2-9
Steering system ................................... 2-10
Tilt lever ................................................ 2-11
Shift lever ............................................. 2-12
Quick Shift Trim System (QSTS)
selector ................................................. 2-13
Handgrip ............................................... 2-15
Reboarding step (for FX Cruiser) ........ 2-15
Yamaha Engine Management System
(YEMS) ................................................. 2-16
Multifunction meter ............................... 2-16
Analog speedometer/tachometer and
indicator lights ...................................... 2-17
Left multifunction display and
operation buttons ................................. 2-20
Storage compartments ........................ 2-25
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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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2-9
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EJU01861
Start switch
Push the start switch 1 (green button) to
start the engine.
NOTE:@ The engine will not start when the clip is
removed from the engine shut-off switch or if
the throttle lever is squeezed.
EJU01784
Cooling water pilot outlet
This watercraft is equipped with cooling
water pilot outlets.
When the engine is running, cooling
water is circulated in the engine, and then it
is discharged from the pilot outlets.
To check for proper operation of the cool-
ing system, check that water is being dis-
charged from the port (left) pilot outlet. If
water is not being discharged from this out-
let, cooling water may not be circulating in
the engine. When this occurs, stop the
engine and check for the cause. (See pages
2-24 and 5-3 for further instructions.)
NOTE:@
If the cooling water passages are dry, it
will take about 60 seconds for the water to
reach the outlet after the engine is
started.

Water discharge may not be constant at
idle, therefore, open the throttle a little to
check that water discharges properly.

Water discharge may not be constant at
the starboard (right) pilot outlet, however,
if it is constant at the port (left) pilot outlet,
the cooling system is operating normally.
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2-24
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EJU22090
Engine overheat warning indicator
This model is equipped with an engine
overheat warning system.
If the engine starts to overheat, the
“WARNING” indicator light and the overheat
warning indicator blink, and then come on.
The buzzer also begins to sound intermit-
tently, and then it sounds continuously. After
the light and indicator start to blink and the
buzzer sounds, the engine speed is limited
to help prevent damage.
If this occurs, immediately reduce the
engine speed, return to shore, and then
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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3-5
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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 the engine compartment.
Check for fuel vapors and loose electrical connections.3-6
Bilge Check for water and fuel and remove if necessary. 3-9
Stern drain plugs Check for proper installation. 3-10
Throttle lever Check that the throttle lever springs back smoothly. 3-12
Steering system Check for proper operation.
Check that the handlebars are securely locked.3-12
Shift lever and reverse gate Check for proper operation. 3-13
QSTS Check for proper operation. 3-14
Fuel and oil Check fuel and oil levels and add if necessary.
Check the hoses and tanks for leakage.3-6, 3-7
Water separator Check for water and drain if necessary. 3-8
Battery Check electrolyte level and battery condition. 3-10
Hood Check that the hood is properly secured. 2-7
Front and rear seats Check that the seats are properly secured. 2-5, 2-6
Hull and deck Check the hull and deck for cracks or other damage. 3-6
Jet unit Check for debris and remove if necessary. 3-15
Fire extinguisher Check condition and replace if necessary. 3-11
Engine shut-off cord Check condition and replace if frayed or broken. 3-15
Switches Check the start switch, engine stop switch, and engine
shut-off switch for proper operation.3-16
Cooling water pilot outlet Check that water is discharged while the engine is run-
ning and the watercraft is in the water.3-16
Multifunction meter Check for warning indications and proper operation. 3-16
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3-7
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EJU20831
Engine oil level
Check the engine oil level before each
use.
CAUTION:@
When checking the engine oil level on
water, be careful of other watercraft,
boats, swimmers, and obstacles. The
water current and wind can cause the
watercraft to move and lead to a colli-
sion.

When checking the engine oil level on
land, supply water to the cooling water
passages. (See page 4-1 for proce-
dures on supplying water.)

Make sure that the engine has enough
oil but do not overfill it. If there is too
little oil, the engine can be damaged. If
there is too much oil, the air filter can
become saturated with oil, perma-
nently damaging the filter and reduc-
ing engine performance. Follow the
checking procedure carefully.

Make sure that debris and water do not
enter the oil tank filler hole. Debris and
water in the engine oil can cause seri-
ous engine damage.
@
Checking the engine oil level:
1. Place the watercraft in a horizontal posi-
tion or launch the watercraft, and then
start the engine.
2. Run the engine at trolling speed for 6
minutes or more, and then stop the
engine.
NOTE:@ If the ambient temperature is 20 °C (68 °F)
or less, warm up the engine for an additional
5 minutes.
@
3. Remove the rear and front seats. (See
pages 2-5 and 2-6 for seat removal and
installation procedures.)
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3-15
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EJU01058
Jet unit
Carefully check the jet intake for weeds,
debris, or anything else that might restrict
the intake of water. If the intake is clogged,
cavitation could occur, reducing jet thrust,
and possibly damaging the jet pump.
In some cases, the engine may overheat
because of lack of cooling water, and dam-
age to the engine could result. Engine cool-
ing water is fed to the engine by the jet
pump. (See page 5-3 for jet intake cleaning
procedures.)
WARNING@
Keep away from intake grate while
engine is on. Items such as long hair,
loose clothing, or PFD straps can
become entangled in moving parts
resulting in severe injury or drowning.

Stop the engine and remove the clip
from the engine shut-off switch before
removing any debris or weeds, which
may have collected around the jet
intake.
EJU01059
Engine shut-off cord (lanyard)
Check that the engine shut-off cord is not
frayed or broken. If the cord is damaged,
replace it; never try to repair it or tie it
together.
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3-16
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EJU18352
Switches
CAUTION:@ Do not run the engine of the watercraft
for more than 15 seconds on land with-
out supplying water, otherwise the
engine may overheat.
@
Check the start switch, the engine stop
switch, and the engine shut-off switch for
proper operation.
Push the start switch 1 to start the
engine. As soon as the engine starts run-
ning, push the engine stop switch 2 to ver-
ify that the engine stops immediately.
Restart the engine, and then pull the engine
shut-off cord 5 to remove the clip 4 from
the engine shut-off switch 3 to verify that
the engine stops immediately. (See pages
2-7 to 2-9 for information on proper opera-
tion of the start switch, the engine stop
switch, and the engine shut-off switch.)
EJU01806
Cooling water pilot outlet
Check that water comes out from the port
(left) pilot water outlet while the engine is
running and the watercraft is in the water.
(See page 2-9 for further instructions.)
EJU01246
Multifunction meter
Check the operation of the multifunction
meter. (See pages 2-16 to 2-24 for operation
of the meter.)
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