2009 YAMAHA VX check engine

Maintenance and care
68
EJU34212Checking the fuel system
WARNING
EWJ00381
Leaking fuel can result in fire or explosion.

Check for fuel leakage regularly.

If any fuel leakage is found, the fuel sys-
tem must be repaired by a qualified me-
chanic. Improper repairs can make the
watercraft unsafe to operate.
Check the fuel system for leaks, cracks, and
malfunctions. If any problem is found, consult
a Yamaha dealer.
Check:

Fuel tank filler cap and seal for damage

Fuel in fuel tank for water and dirt

Fuel tank for damage, cracks, and leakage

Fuel hoses and joints for damage, cracks,
and leakage

Air bleeding passages for leakageEJU34230Fuel tank
Check the fuel tank for leakage and for water
in the tank. If water is found in the fuel system,
or if the fuel tank needs to be cleaned, have a
Yamaha dealer service the watercraft.
EJU34292Engine oil and oil filter
WARNING
EWJ00340
Engine oil is extremely hot immediately af-
ter the engine is turned off. Coming in con-
tact with or getting any engine oil on your
clothes could result in burns.
NOTICE
ECJ00181
Do not run the engine with too much or not
enough oil in the oil tank, otherwise the
engine could be damaged.
It is recommended to have a Yamaha dealer
change the engine oil. However, if you choose
to change the oil on your own, consult a
Yamaha dealer.
EJU34311Air filter element
Have a Yamaha dealer check the air filter ele-
ment at the intervals specified in the periodic
maintenance chart.
EJU34321Checking the jet thrust nozzle angle
Check the handlebars and jet thrust nozzle for
smooth operation.
Turn the handlebars as far as possible to the
right and left and check that the difference of
distances A and B between the jet thrust noz-
zle and the nozzle is within specification.
1Fuel tank
Recommended engine oil:
SAE 10W-30, 20W-40, 20W-50
Oil grade:
API SE,SF,SG,SH,SJ,SL
Oil quantity:
With oil filter replacement:
2.2 L (2.33 US qt, 1.94 Imp.qt)
Without oil filter replacement:
2.0 L (2.11 US qt, 1.76 Imp.qt)
Total amount:
4.3 L (4.55 US qt, 3.78 Imp.qt)
UF2L70E0.book Page 68 Thursday, June 19, 2008 8:38 AM

Maintenance and care
73
(2) Connect the breather hose to the battery.
(3) Secure the battery in place. WARNING!
Fire or explosion could result if the
breather hose is damaged, obstruct-
ed, or not connected properly.
[EWJ00451]
EJU34491
Fuel injection system
If the fuel injection system is malfunctioning,
have a Yamaha dealer service the watercraft.
EJU34500Checking the trolling speed
(1) Place the watercraft in the water.
(2) Start the engine and warm it up. Use the
tachometer in the multifunction informa-
tion center to check the trolling speed.
If the trolling speed is out of specification,
have a Yamaha dealer service the watercraft.
1Positive (+) battery terminal: Red lead
2Negative (–) battery terminal: Black lead
3Breather hose
Trolling speed:
1650 ±50 r/min
UF2L70E0.book Page 73 Thursday, June 19, 2008 8:38 AM

Trouble recovery
75
EJU34560
Troubleshooting
If you have any trouble with your watercraft, use this section to check for the possible cause.
If you cannot find the cause, or if the procedure for replacement or repair is not described in
this owner’s/operator’s manual, have a Yamaha dealer perform the necessary service.
EJU34593Troubleshooting chart
TROUBLE POSSIBLE CAUSE REMEDY PAGE
Engine does not
start (Starter motor
does not turn over)Yamaha Se-
curity Sys-
tem (VX
Deluxe/VX
Cruiser)Lock mode selected Select unlock mode
29
Engine shut-
off switchClip not in place Install clip
25
Fuse Burned out Replace fuse and
check wiring79
Battery Run down Recharge 72
Poor terminal con-
nectionsTighten as required
72
Terminal corroded Clean 63
Starter motor Faulty Have serviced by
Yamaha dealer—
Engine does not
start (Starter motor
turns over)Throttle lever Squeezed Release 26
Fuel Empty Refill as soon as pos-
sible38
Stale or contaminat-
edHave serviced by
Yamaha dealer68
Fuel tank Water or dirt present Have serviced by
Yamaha dealer68
Spark plug Fouled or defective Clean or replace 70
Spark plug
capNot connected or
looseConnect properly
70
Connected to wrong
cylinderConnect properly
70
Fuel injec-
tion systemFuel pump faulty Have serviced by
Yamaha dealer—
UF2L70E0.book Page 75 Thursday, June 19, 2008 8:38 AM

Trouble recovery
76
Engine runs irregu-
larly or stallsFuel Empty Refill as soon as pos-
sible38
Stale or contaminat-
edHave serviced by
Yamaha dealer68
Fuel tank Water or dirt present Have serviced by
Yamaha dealer68
Spark plug Fouled or defective Replace 70
Incorrect heat range Replace 70
Gap incorrect Adjust 70
Spark plug
capLoose Connect properly 70
Cracked, torn, or
damagedHave serviced by
Yamaha dealer—
Electrical wir-
ingLoose connection Have serviced by
Yamaha dealer—
Fuel injec-
tion systemFaulty or clogged in-
jectorsHave serviced by
Yamaha dealer—
Warning light or in-
dicator blinksFuel level Empty Refill as soon as pos-
sible38
Oil pressure
warningOil pressure dropped Have serviced by
Yamaha dealer33
Engine over-
heatedJet intake clogged Clean
78
Check engine
warningFaulty sensors Have serviced by
Yamaha dealer34 TROUBLE POSSIBLE CAUSE REMEDY PAGE
UF2L70E0.book Page 76 Thursday, June 19, 2008 8:38 AM

Trouble recovery
78
EJU34620
Emergency procedures EJU34631Cleaning the jet intake and impeller
WARNING
EWJ00780
Before attempting to remove weeds or de-
bris from the jet intake or impeller area,
shut the engine off and remove the clip
from the engine shut-off switch. Severe in-
jury or death could result from coming in
contact with the rotating parts of the jet
pump.
If weeds or debris gets caught in the jet intake
or impeller, cavitation can occur, causing jet
thrust to decrease even though engine speed
rises. If this condition is allowed to continue,
the engine will overheat and may seize.
NOTICE: If weeds or debris gets caught in
the jet intake, do not operate the watercraft
above trolling speed until they have been
removed.
[ECJ00651]
If there is any sign that the jet intake or impel-
ler is clogged with weeds or debris, return to
shore and check the intake and impeller. Al-ways stop the engine before beaching the wa-
tercraft.
(1) Place a suitable clean cloth or carpeting
underneath the watercraft to protect it
from abrasions and scratches. Turn the
watercraft on its side as shown. NOTICE:
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.
[ECJ00661]
UF2L70E0.book Page 78 Thursday, June 19, 2008 8:38 AM

Index
A
Air filter element ....................................... 68
B
Battery ................................................ 44, 63
Battery, checking...................................... 72
Battery, jumping ....................................... 79
Beaching the watercraft ........................... 59
Bilge ......................................................... 43
Boarding alone ......................................... 54
Boarding and starting from a dock ........... 53
Boarding and starting in deep water ........ 53
Boarding and starting in shallow water .... 53
Boarding with passengers ........................ 54
Bow eye ................................................... 28
Builder’s plate............................................. 2
C
Capsized watercraft ................................. 56
Check engine warning indicator ............... 34
Cleaning the watercraft ............................ 64
Cooling water pilot outlet .................... 26, 47
Craft Identification Number (CIN) ............... 1
Cruising limitations ................................... 10
D
Docking the watercraft ............................. 59
E
Emergency procedures ............................ 78
Engine break-in ........................................ 48
Engine compartment ................................ 42
Engine oil ................................................. 39
Engine oil and oil filter .............................. 68
Engine oil level ......................................... 42
Engine overheat warning indicator ........... 33
Engine serial number ................................. 1
Engine shut-off cord (lanyard) .................. 46
Engine shut-off switch .............................. 25
Engine stop switch ................................... 25
Enjoy your watercraft responsibly ............ 18
F
Fire extinguisher....................................... 44
Flushing the cooling system ..................... 62
Front storage compartment ...................... 35
Fuel .......................................................... 38
Fuel and oil............................................... 38
Fuel injection system................................ 73
Fuel level .................................................. 42Fuel level meter ........................................ 31
Fuel level warning indicator ...................... 32
Fuel system, checking .............................. 68
Fuel tank .................................................. 68
Fuel tank filler cap .................................... 24
Fuses, replacing ....................................... 79
G
Getting to know your watercraft ............... 51
Glove compartment .................................. 36
H
Handgrip ................................................... 27
Hazard information ................................... 14
Hood ......................................................... 23
Hour meter/voltmeter ............................... 32
Hull and deck ........................................... 42
I
Identification numbers ................................ 1
J
Jet intake .................................................. 46
Jet intake and impeller, cleaning .............. 78
Jet thrust nozzle angle, checking ............. 68
Jumper cables, connecting ...................... 79
L
Labels, important ........................................ 3
Labels, other .............................................. 7
Labels, warning .......................................... 4
Launching the watercraft .......................... 48
Learning to operate your watercraft ......... 51
Leaving the watercraft .............................. 50
Limitations on who may operate
the watercraft .......................................... 9
“L-MODE” indicator light
(for VX Deluxe/VX Cruiser) ................... 35
Lubrication................................................ 63
Lubrication points ..................................... 71
M
Main components, location of .................. 19
Maintenance and adjustments ................. 64
Model information....................................... 2
Multifunction information center ......... 31, 47
O
Oil pressure warning indicator .................. 33
Operating in weeded areas ...................... 60
Operating your watercraft ......................... 51
Operation ................................................. 48
UF2L70E0.book Page 1 Thursday, June 19, 2008 8:38 AM

Index
Operation of controls and other
functions ............................................... 23
Operation requirements ........................... 11
Owner’s/operator’s manual and tool kit .... 64
P
Periodic maintenance chart...................... 66
Post-operation care .................................. 60
Pre-operation check list............................ 40
Pre-operation check points ...................... 42
Pre-operation checks ............................... 40
Primary Identification (PRI-ID) number ...... 1
R
Reboarding step (for VX Cruiser) ............. 28
Recommended equipment ....................... 13
Remote control transmitter
(for VX Deluxe/VX Cruiser) ................... 24
Reverse on waterways
(for VX Deluxe/VX Cruiser) ................... 59
Riding with passengers ............................ 52
S
Safe boating rules .................................... 17
Seat .......................................................... 23
“SECURITY” indicator light
(for VX Deluxe/VX Cruiser) ................... 34
Selecting the operation mode
(for VX Deluxe/VX Cruiser) ................... 30
Shift cable, checking
(for VX Deluxe/VX Cruiser) ................... 69
Shift lever and reverse gate
(for VX Deluxe/VX Cruiser) ................... 45
Shift lever (for VX Deluxe/VX Cruiser) ..... 27
Shifting (for VX Deluxe/VX Cruiser) ......... 50
Spark plugs, cleaning and adjusting ........ 70
Speedometer............................................ 31
Start switch............................................... 26
Starting the engine ................................... 48
Starting the watercraft .............................. 52
Steering system ................................. 27, 45
Stern drain plugs ...................................... 44
Stern eyes ................................................ 28
Stopping the engine ................................. 49
Stopping the watercraft ............................ 58
Storage..................................................... 62
Storage compartments ............................. 35
Submerged watercraft .............................. 80Switches ................................................... 46
T
Tachometer .............................................. 31
Throttle cable, checking and adjusting ..... 69
Throttle lever ...................................... 26, 45
Towing the watercraft ............................... 80
Transporting ............................................. 61
Trolling speed, checking .......................... 73
Troubleshooting ....................................... 75
Troubleshooting chart .............................. 75
Turning the watercraft .............................. 57
W
Water separator ....................................... 43
Watercraft characteristics ......................... 14
Water-skiing ............................................. 16
Y
Yamaha Engine Management System
(YEMS) ................................................. 28
Yamaha Security System
(for VX Deluxe/VX Cruiser) ................... 29
Yamaha Security System settings
(for VX Deluxe/VX Cruiser) ................... 29
UF2L70E0.book Page 2 Thursday, June 19, 2008 8:38 AM