2008 YAMAHA VX cooling

Operation
48
EJU32670Switches
CAUTION:
ECJ00410
Do not run the engine for more than 15
seconds when checking the switches on
land without supplying water, otherwise
the engine could overheat.
Check the start switch, the engine stop
switch, and the engine shut-off switch for
proper operation.
Push the start switch to start the engine. As
soon as the engine starts running, push the
engine stop switch to verify that the engine
stops immediately. Restart the engine, and
then pull the engine shut-off cord to remove
the clip from the engine shut-off switch to ver-
ify that the engine stops immediately. (See
pages 25 to 26 for information on proper op-
eration of the start switch, the engine stop
switch, and the engine shut-off switch.)
EJU32680Cooling water pilot outlet
Check that water comes out from the cooling
water pilot outlet while the engine is runningand the watercraft is in the water. (See page
26 for more information.)
EJU32710Multifunction information center
Check the multifunction information center for
proper operation. (See page 30 for informa-
tion on proper operation of the multifunction
information center.)
1Start switch
2Engine stop switch
3Engine shut-off switch
4Clip
5Engine shut-off cord
UF1K73E0.book Page 48 Wednesday, July 11, 2007 9:15 AM

Operation
61
during slow-speed maneuvering, such as
when docking.
Once the engine is idling, shift into reverse
and gradually increase engine speed. Make
sure that there are no obstacles or people be-
hind you before shifting into reverse.
EJU33350Rough water operation
The force of landing after jumping can cause
a strong impact on both the watercraft and the
operator and passengers. It is possible for the
operator to hit his or her chest or jaw on the
watercraft or handlebars and be injured. The
passengers could also impact the watercraft
and be injured.
Do not operate the watercraft with your chin
right above the handlebars. In addition, the
operator and passengers should keep their
feet on the floor of the footwell.
Operating in rough water or jumping waves
can also crack the watercraft hull and deck,
and damage internal parts. Avoid operating in
rough water or bad weather conditions.
EJU33381
Post-operation care
To keep your watercraft in top shape, always
take it out of the water after using it and per-
form the following procedures. Leaving the
watercraft in the water for extended periods
will accelerate the rate of normal deterioration
of the jet unit components and hull finish. Ma-
rine organisms and corrosion are some of the
conditions that can adversely affect the life of
many watercraft components.
(1) Remove the watercraft from the water.
(2) Wash down the hull, handlebars, and jet
unit with fresh water.
(3) Remove the seat and check the engine
compartment for water. To drain excess
water, remove the stern drain plugs, and
then raise the bow of the watercraft
enough to allow the water in the bilge to
drain out.
NOTE:
This watercraft is equipped with an automatic
bilge draining system that removes water
from the engine compartment while you are
underway. However, some residual water will
remain.
(4) Place the watercraft in a horizontal posi-
tion.
(5) Flush the cooling system to prevent it
from clogging with salt, sand, or dirt. (See
page 63 for flushing procedures.)
UF1K73E0.book Page 61 Wednesday, July 11, 2007 9:15 AM

Maintenance and care
63
EJU33490
Storage
WARNING
EWJ00330
Always place the watercraft upright in a
horizontal position when storing it, other-
wise fuel could leak out into the engine or
engine compartment, which could create a
fire hazard.
Storage for long periods of time, such as win-
ter storage, requires preventive maintenance
to ensure against deterioration. It is advisable
to have the watercraft serviced by a Yamaha
dealer prior to storage. However, the following
procedures can be performed by the owner.
EJU33542Flushing the cooling system
Flushing the cooling system is essential to
prevent it from clogging with salt, sand, or dirt.
CAUTION:
ECJ00121

Do not supply water to the cooling water
passages when the engine is not run-
ning. The water could flow back through
the muffler into the crankcase, causing
severe engine damage.

Do not run the engine for more than 15
seconds without supplying water or
over 4000 r/min on land, otherwise the
engine could overheat.
(1) Place the watercraft in a horizontal posi-
tion.
(2) Remove the seat. (See page 23 for seat
removal and installation procedures.)
(3) Remove the flushing hose connector
cap, and then insert the garden hoseadapter into the flushing hose connector
and turn it until it is securely connected.
(4) Connect the garden hose adapter to a
water tap using a garden hose.
NOTE:
A garden hose is not included and must be
purchased separately.
(5) Start the engine, and then immediately
turn the water supply on until water flows
out continually from the jet thrust nozzle.
(6) Run the engine at idling speed for about
3 minutes watching the engine condition.
If the engine stops while flushing, turn the
water supply off immediately and repeat
the above steps.
(7) Turn the water supply off, and then force
the remaining water out of the cooling
1Flushing hose connector cap
2Garden hose adapter
3Flushing hose connector
UF1K73E0.book Page 63 Wednesday, July 11, 2007 9:15 AM

Maintenance and care
68
EJU33821Periodic maintenance chart
The following chart gives general guidelines for periodic maintenance. However, maintenance
may need to be performed more frequently depending on your operating conditions.
This“” mark indicates maintenance that you may do yourself.
This“” mark indicates work to be done by a Yamaha dealer.
Item OperationInitial Thereafter every
Page 10
hours50
hours100
hours100
hours200
hours
6
months12
months12
months24
months
Spark plugsCheck, clean, adjust 72
Lubrication pointsLubricate 73
Fuel systemCheck 70
Fuel tankCheck, clean 70
Trolling speedCheck, adjust 76
Throttle shaftCheck—
Cooling water pas-
sagesFlush
*63
Water inlet strain-
erCheck, clean—
Bilge strainerClean—
ImpellerCheck—
Jet thrust nozzle
angleCheck, adjust 71
Shift cable and re-
verse gate
(VX Deluxe/VX
Cruiser)Check, adjust 71
Throttle cableCheck, adjust 72
Stern drain plugsCheck, replace 44
BatteryCheck, charge 74
Rubber couplingCheck—
Engine mountCheck—
Nuts and boltsCheck—
Air filter elementCheck 71
Engine oilReplace 70
UF1K73E0.book Page 68 Wednesday, July 11, 2007 9:15 AM

Specifications
77
EJU34542
Specifications
Watercraft capacity:
Maximum people on board:
3 person
Maximum load capacity:
240 kg (530 lb)
Dimensions:
Length:
3220 mm (126.8 in)
Width:
1170 mm (46.1 in)
Height:
1150 mm (45.3 in)
Dry weight:
VX 319 kg (703 lb)
VX Deluxe 322 kg (710 lb)
VX Cruiser 323 kg (712 lb)
Performance:
Maximum output (according to ISO 8665/SAE
J1228):
75.00 kW@8000 r/min
Maximum fuel consumption:
28.0 L/h (7.4 US gal/h) (6.2 Imp.gal/h)
Cruising range at full throttle:
2.14 hour
Trolling speed:
1650 ±50 r/min
Engine:
Engine type:
Liquid cooled 4-stroke, DOHC
Number of cylinders:
4
Engine displacement:
1052 cm³
Bore & stroke:
76.0 × 58.0 mm (2.99 × 2.28 in)
Compression ratio:
11.4 : 1
Valve clearance-intake (cold):
0.11–0.20 mm (0.0043–0.0079 in)
Valve clearance-exhaust (cold):
0.25–0.34 mm (0.0098–0.0134 in)
Lubrication system:
Dry sump
Cooling system:
Water
Starting system:
ElectricIgnition system:
T.C.I.
Spark plug:
CR9EB
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
Battery capacity:
12 V, 19.0 Ah
Charging system:
Flywheel magneto
Drive unit:
Propulsion system:
Jet pump
Jet pump type:
Axial flow, single stage
Impeller rotation:
Counterclockwise
Jet thrust nozzle angle:
24.0+24.0 °
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Minimum octane rating (PON):
86
Minimum octane rating (RON):
90
Recommended engine oil type SAE:
SAE 10W-30, 20W-40, 20W-50
Recommended engine oil grade API:
API SE,SF,SG,SH,SJ,SL
Fuel tank total capacity:
60 L (15.9 US gal) (13.2 Imp.gal)
Engine oil quantity with oil filter replacement:
2.2 L (2.33 US qt) (1.94 Imp.qt)
Engine oil quantity without oil filter replacement:
2.0 L (2.11 US qt) (1.76 Imp.qt)
Engine oil total quantity:
4.3 L (4.55 US qt) (3.78 Imp.qt)
UF1K73E0.book Page 77 Wednesday, July 11, 2007 9:15 AM

Index
A
Air filter element ....................................... 71
B
Battery ................................................ 44, 65
Battery, checking...................................... 74
Battery, jumping ....................................... 81
Beaching the watercraft ........................... 60
Bilge ......................................................... 43
Boarding alone ......................................... 55
Boarding and starting from a dock ........... 54
Boarding and starting in deep water ........ 54
Boarding and starting in shallow water .... 54
Boarding with passengers ........................ 55
Bow eye ................................................... 28
Builder’s plate............................................. 2
C
Capsized watercraft ................................. 57
Check engine warning indicator ............... 34
Cleaning the watercraft ............................ 65
Cooling water pilot outlet .................... 26, 48
Craft Identification Number (CIN) ............... 1
Cruising limitations ................................... 10
D
Docking the watercraft ............................. 60
E
Emergency procedures ............................ 80
Engine break-in ........................................ 49
Engine compartment ................................ 42
Engine oil ................................................. 39
Engine oil and oil filter .............................. 70
Engine oil level ......................................... 42
Engine overheat warning indicator ........... 33
Engine serial number ................................. 1
Engine shut-off cord ................................. 47
Engine shut-off switch .............................. 25
Engine stop switch ................................... 25
Enjoy your watercraft responsibly ............ 18
F
Fire extinguisher....................................... 45
Flushing the cooling system ..................... 63
Front storage compartment ...................... 35
Fuel and oil............................................... 38
Fuel injection system................................ 75
Fuel level .................................................. 42
Fuel level meter........................................ 31Fuel level warning indicator ...................... 32
Fuel system .............................................. 64
Fuel system, checking .............................. 70
Fuel tank .................................................. 70
Fuel tank filler cap .................................... 24
Fuel tank, filling ........................................ 39
Fuses, replacing ....................................... 82
G
Gasohol .................................................... 38
Gasoline ................................................... 38
Getting to know your watercraft ............... 52
Glove compartment .................................. 36
H
Handgrip ................................................... 28
Hazard information ................................... 14
Hood ......................................................... 23
Hour meter/voltmeter ............................... 32
Hull and deck ........................................... 42
I
Identification numbers ................................ 1
Important labels .......................................... 3
J
Jet intake .................................................. 47
Jet intake and impeller, cleaning .............. 80
Jet thrust nozzle angle, checking ............. 71
Jumper cables, connecting ...................... 81
L
Labels, other .............................................. 7
Labels, warning .......................................... 4
Launching the watercraft .......................... 49
Learning to operate your watercraft ......... 52
Leaving the watercraft .............................. 51
Limitations on who may operate the
watercraft ................................................ 9
“L-MODE” indicator light (for VX Deluxe/
VX Cruiser) ........................................... 35
Lubrication................................................ 64
Lubrication points ..................................... 73
M
Main components, location of .................. 19
Maintenance and adjustments ................. 66
Model information....................................... 2
Multifunction information center ......... 30, 48
O
Oil pressure warning indicator .................. 32
UF1K73E0.book Page 1 Wednesday, July 11, 2007 9:15 AM