ECU YAMAHA VX SPORT 2008 Owner's Manual

Maintenance and care
65

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

Stop the 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 approxi-
mately 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 watercraft
in a horizontal position.

Tighten the fuel tank filler cap securely
after refueling.

If you should swallow some gasoline, in-
hale a lot of gasoline vapor, or get gaso-
line in your eyes, get immediate medical
attention.

If any gasoline spills on your skin or
clothing, immediately wash the affected
area with soap and water and change
your clothes.
Top off the fuel tank with fresh gasoline and
add fuel stabilizer and conditioner to the fuel
tank according to the manufacturer’s instruc-
tions.
EJU33680Battery
If the watercraft will not be used for more than
a month, remove the battery from the water-
craft and store it in a cool, dry place.(1) Disconnect the negative (–) battery lead
first, then the positive (+) battery lead and
breather hose, and then remove the bat-
tery from the watercraft.
(2) Clean the battery casing using fresh wa-
ter.
(3) If the battery terminals are dirty or corrod-
ed, clean them with a wire brush.
(4) Fully charge the battery.
(5) Apply Yamaha Marine Grease or
Yamaha Grease A to the battery termi-
nals, and then store the battery in a cool,
dry place.
(6) Check the battery at least once every 2
months and fully charge it if necessary.
CAUTION:
ECJ00100
Always keep the battery charged. Storing
a discharged battery can cause permanent
battery damage.
To check the condition of the battery, check
the specific gravity of the electrolyte or mea-
sure 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 charge the bat-
tery. If you maintain the battery yourself, be
sure to read and follow the instructions provid-
ed with the battery tester and charger you
use.
EJU33730Cleaning the watercraft
Clean the watercraft before storing it for a long
period.
(1) Wash down the hull, handlebars, and jet
unit with fresh water. Specific gravity (for reference):
1.28 at 20 °C (68 °F)
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Maintenance and care
73
To remove a spark plug:
(1) Remove the seat. (See page 23 for seat
removal and installation procedures.)
(2) Remove the spark plug cap.
CAUTION:
ECJ00210
Do not use any tools to remove or install
the spark plug cap, otherwise the ignition
coil coupler could be damaged. The spark
plug cap may be difficult to remove be-
cause the rubber seal on the end of the
cap fits tightly. To remove the spark plug
cap, simply twist it back and forth while
pulling it up; to install it, twist it back and
forth while pushing it down.
(3) Remove the spark plug.
Measure the spark plug gap with a wire
thickness gauge. Replace the spark plug
or adjust the gap to specification if neces-
sary.
To install a spark plug:
(1) Clean the gasket surface.
(2) Wipe any dirt from the threads of the
spark plug.(3) Install the spark plug, and then tighten it
to the specified torque.
(4) Install the spark plug cap.
NOTE:

Wipe off any water on the spark plug or in-
side the spark plug cap before installing the
cap. Push the spark plug cap down until it is
securely installed.

If a torque wrench is not available when you
are installing a spark plug, a good estimate
of the correct torque is 1/4 turn to 1/2 turn
past finger tight using the spark plug
wrench included in the tool kit. Have the
spark plug adjusted to the correct torque
with a torque wrench as soon as possible.
WARNING
EWJ00350
Be careful not to damage the insulator
when removing or installing a spark plug.
A damaged insulator could allow sparks to
escape, which could result in a fire or ex-
plosion.
(5) Install the seat.EJU34422Lubrication points
To keep moving parts sliding or rotating
smoothly, coat them with water-resistant
grease.

Throttle cable (handlebar end)
Loosen the adjuster and disconnect the
outer cable from the bracket. Spray a rust
inhibitor into the outer cable. Connect the
outer cable, and then adjust the throttle ca- Specified spark plug:
CR9EB
1Spark plug gap
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
Spark plug tightening torque:
12.5 Nm (9.2 ft-lb) (1.27 kgf-m)
Recommended water-resistant grease:
Yamaha Marine Grease/Yamaha
Grease A
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Maintenance and care
74
ble free play. (See page 72 for adjustment
procedures.)

Steering cable (handlebar end)

Steering cable (jet thrust nozzle end)

For VX Deluxe/VX Cruiser:
Shift cable (reverse gate end)
EJU34451Checking the battery
Check the level of the battery electrolyte and
make sure that the negative (–) and positive
(+) battery leads are tightened securely.
WARNING
EWJ00790
Battery electrolyte is poisonous and dan-
gerous, causing severe burns, etc. Elec-
trolyte contains sulfuric acid. Avoid
contact with skin, eyes, or clothing.
Antidotes
External: Flush with water.
Internal: Drink large quantities of water or
milk. Follow with milk of magnesia, beaten
egg, or vegetable oil. Call a physician im-
mediately.
Eyes: Flush with water for 15 minutes and
get prompt medical attention.
Batteries produce explosive gases. Keep
sparks, flames, cigarettes, etc., well away.
If using or charging the battery in an en-
closed space, make sure that it is well ven-
tilated. Always shield your eyes when
working near batteries.
KEEP OUT OF THE REACH OF CHILDREN.
1Adjuster
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Maintenance and care
75
CAUTION:
ECJ00230

Be careful not to place the battery on its
side.

Be sure to remove the battery from the
battery compartment when adding elec-
trolyte or charging the battery.
To remove the battery:
Disconnect the negative (–) battery lead first,
then the positive (+) battery lead and breather
hose, and then remove the battery from the
watercraft.
To replenish the battery:
(1) Make sure that the electrolyte level is be-
tween the maximum and minimum level
marks.
(2) If the electrolyte level is low, add distilled
water to raise it to the specified level.
CAUTION:
ECJ00240
Normal tap water contains minerals that
are harmful to a battery. Use only distilled
water for replenishing the battery.
To recharge the battery:
CAUTION:
ECJ00250
Do not attempt to charge a battery hastily.
Battery life could be shortened.
It is recommended to have a Yamaha dealer
charge the battery. If you charge the battery
yourself, be sure to read and follow the in-
structions provided with the battery tester and
charger you use.
To install the battery:
(1) Place the battery in the battery compart-
ment and connect the battery leads to the
battery terminals.
(2) Connect the breather hose to the battery.
(3) Secure the battery in place.
WARNING
EWJ00400
Be sure to connect the breather hose to
the battery. Fire or explosion could result
if the breather hose is damaged, obstruct-
ed, or not connected properly.
CAUTION:
ECJ00260
After installation, make sure that the bat-
tery leads are properly connected to the
battery terminals.
EJU34490Fuel injection system
The fuel injection system was set at the
Yamaha factory. If the fuel injection system
needs to be adjusted, have a Yamaha dealer
service the watercraft.
1Maximum level mark
2Minimum level mark
1Positive (+) battery terminal: Red lead
2Negative (–) battery terminal: Black lead
3Breather hose
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Trouble recovery
81
CAUTION:
ECJ00660

Place a suitable clean cloth or carpeting
underneath the watercraft to protect it
from abrasions and scratches.

Always turn the watercraft over onto its
port (left) side.

When turning the watercraft on its side,
support the bow so that the handlebars
are not bent or damaged.
(2) Remove any weeds or debris from
around the drive shaft, impeller, jet pump
housing, and jet thrust nozzle.
If debris is difficult to remove, consult a
Yamaha dealer.
CAUTION:
ECJ00670
Always avoid operating your watercraft in
areas where weed growth is thick. If travel-
ing in weeded areas is unavoidable, oper-
ate the engine alternately at partial throttle
and full throttle. Weeds tend to accumu-
late more at a steady speed and at trolling
speed. If weeds clog the jet intake or im-
peller area and cause cavitation, follow the
cleaning procedure above.
EJU34640Jumping the battery
If the watercraft battery has run down, the en-
gine can be started using a 12-volt booster
battery and jumper cables.
WARNING
EWJ00790
Battery electrolyte is poisonous and dan-
gerous, causing severe burns, etc. Elec-
trolyte contains sulfuric acid. Avoid
contact with skin, eyes, or clothing.
Antidotes
External: Flush with water.
Internal: Drink large quantities of water or
milk. Follow with milk of magnesia, beatenegg, or vegetable oil. Call a physician im-
mediately.
Eyes: Flush with water for 15 minutes and
get prompt medical attention.
Batteries produce explosive gases. Keep
sparks, flames, cigarettes, etc., well away.
If using or charging the battery in an en-
closed space, make sure that it is well ven-
tilated. Always shield your eyes when
working near batteries.
KEEP OUT OF THE REACH OF CHILDREN.
EJU34661Connecting the jumper cables
(1) Connect the positive (+) jumper cable to
the positive (+) battery terminals of both
batteries.
(2) Connect one end of the negative (–)
jumper cable to the negative (–) battery
terminal of the booster battery.
(3) Connect the other end of the negative (–)
jumper cable to an engine hanger.
CAUTION:
ECJ00680
Do not connect the end of the negative (–)
jumper cable to the negative (–) battery
terminal of the watercraft battery! Make
sure that all connections are secure and
correct before attempting to start the en-
1Positive (+) jumper cable
2Negative (–) jumper cable
3Booster battery
4Engine hanger
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Trouble recovery
82
gine. Any wrong connection could dam-
age the electrical system.
(4) Start the engine, and then disconnect the
jumper cables by reversing the steps
above.
CAUTION:
ECJ00480

Never push the start switch while the en-
gine 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 could
be damaged. If the engine does not start
in 5 seconds, release the start switch,
wait 15 seconds, and then try again.
EJU34690Replacing the fuses
The fuses are located in the electrical box.
To replace a fuse:
(1) Remove the cap on the electrical box.(2) Replace the blown fuse with the spare
fuse of the correct amperage by using the
fuse puller on the reverse side of the cap.
1Electrical box
2Cap
3Fuse
4Spare fuse
1Fuse puller
Fuse amperage:
Battery fuse:
30 A
Main relay drive fuse:
10 A
Electronic throttle valve fuse:
10 A
Security system fuse:
3 A
Main fuse:
20 A
UF1K73E0.book Page 82 Wednesday, July 11, 2007 9:15 AM

Index
Operating your watercraft......................... 52
Operation ................................................. 49
Operation of controls and other
functions ............................................... 23
Operation requirements ........................... 11
Owner’s/operator’s manual and tool kit .... 67
P
Periodic maintenance chart...................... 68
Post-operation care .................................. 61
Pre-operation check list............................ 40
Pre-operation check points ...................... 42
Pre-operation checks ............................... 40
Primary Identification (PRI-ID) number ...... 1
R
Recommended equipment ....................... 13
Remote control transmitter
(for VX Deluxe/VX Cruiser) ................... 24
Reverse on waterways
(for VX Deluxe/VX Cruiser) ................... 60
Riding with passengers ............................ 53
Rough water operation ............................. 61
S
Safe boating rules .................................... 17
Seat .......................................................... 23
“SECURITY” indicator light
(for VX Deluxe/VX Cruiser) ................... 34
Selecting the normal mode/low-RPM
mode (for VX Deluxe/VX Cruiser) ......... 30
Shift cable, checking (for VX Deluxe/
VX Cruiser) ........................................... 71
Shift lever and reverse gate
(for VX Deluxe/VX Cruiser) ................... 46
Shift lever (for VX Deluxe/VX Cruiser) ..... 27
Spark plugs, cleaning and adjusting ........ 72
Speedometer............................................ 31
Start switch............................................... 26
Starting the engine ................................... 49
Starting the watercraft .............................. 53
Steering system ................................. 27, 45
Stern drain plugs ...................................... 44
Stern eyes ................................................ 28
Stopping the engine ................................. 51
Stopping the watercraft ............................ 60
Storage..................................................... 63
Storage compartments ............................. 35Submerged watercraft .............................. 83
Switches ................................................... 48
T
Tachometer .............................................. 31
Throttle cable, checking and adjusting ..... 72
Throttle lever ...................................... 26, 45
Towing the watercraft ............................... 83
Transporting ............................................. 62
Trolling speed, checking .......................... 76
Troubleshooting ....................................... 78
Troubleshooting chart .............................. 78
Turning the watercraft .............................. 58
W
Water separator ....................................... 43
Watercraft characteristics ......................... 14
Water-skiing ............................................. 16
Y
Yamaha Engine Management System
(YEMS) ................................................. 28
Yamaha Security System and low-RPM
mode (for VX Deluxe/VX Cruiser) ......... 29
Yamaha Security System
(for VX Deluxe/VX Cruiser) ................... 29
Yamaha Security System lock and
unlock modes (for VX Deluxe/
VX Cruiser) ........................................... 29
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