2016 YAMAHA VX engine

Maintenance
88
*1: Whichever comes first.
*2: Check every 200 hours.
Perform the pre-operation checks and post-operation checks before performing periodic
maintenance.
Exhaust systemCheck for exhaust leak-
age, and check hoses and
clamps√—
Breather hoseCheck breather hose and
clamps√—
ImpellerCheck for bends, dam-
age, and foreign material√—
Jet thrust nozzleCheck movement, and lu-
bricate√—
Jet vacuum bilgeCheck hoses for clogs
and damage, check
clamps, and clean bilge
strainer√—
Stern drain plugsCheck O-rings√—
AnodeCheck for corrosion, and
clean√ *2 —
Valve clearanceCheck and adjust√ *2 —
Rubber couplingCheck for cracks, inden-
tations, looseness, and
noise√—
Engine mountCheck for damage and
peeling√— Item OperationInitial Thereafter every
Page
10 hours50 hours
or 12
months
*1100
hours or
12
months
*1200
hours or
24
months
*1
UF4G70E0.book Page 88 Monday, September 28, 2015 3:14 PM

Maintenance
89
EJU36943Engine oil and oil filter
WARNING
EWJ00341
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
ECJ00992
Do not run the engine with too much or not
enough oil in the engine, otherwise the en-
gine could be damaged.
It is recommended to have a Yamaha dealer
change the engine oil and the engine oil filter.
However, if you choose to change the oil and
filter on your own, consult a Yamaha dealer.
UF4G70E0.book Page 89 Monday, September 28, 2015 3:14 PM

Specifications
90
EJU34543
Specifications
Watercraft capacity:
Maximum people on board:
3 person
Maximum load capacity:
240 kg (530 lb)
Dimensions and weight:
Length:
3340 mm (131.5 in) (VX)
3350 mm (131.9 in) (VX Deluxe / VX Cruiser /
VX Limited)
Width:
1220 mm (48.0 in)
Height:
1190 mm (46.9 in)
Dry weight:
321 kg (708 lb) (VX)
301 kg (664 lb) (VX Deluxe)
303 kg (668 lb) (VX Cruiser / VX Limited)
Performance:
Maximum output (according to ISO 8665/SAE
J1228):
84.6 kW at 8000 r/min
Maximum fuel consumption:
33.5 L/h (8.8 US gal/h, 7.4 Imp.gal/h)
Cruising range at full throttle:
2.09 hour
Trolling speed:
1500 ±100 r/min
Engine:
Engine type:
Liquid cooled 4-stroke, DOHC
Number of cylinders:
3
Engine displacement:
1049 cm³
Bore × stroke:
82.0 × 66.2 mm (3.23 × 2.61 in)
Compression ratio:
11.0 : 1
Valve clearance-intake (cold):
0.15–0.22 mm (0.0059–0.0087 in)
Valve clearance-exhaust (cold):
0.26–0.32 mm (0.0102–0.0126 in)
Lubrication system:
Dry sump
Cooling system:
WaterStarting system:
Electric
Ignition system:
T.C.I.
Spark plug (NGK):
CR9EB
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
Battery capacity:
12 V, 19 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+24 °
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Minimum octane rating (PON):
86
Minimum octane rating (RON):
90
Recommended engine oil:
YAMALUBE 4W or 4-stroke motor oil
Recommended engine oil type SAE:
SAE 10W-30, 10W-40, 20W-40, 20W-50
Recommended engine oil grade API:
API SE,SF,SG,SH,SJ,SL
Fuel tank total capacity:
70 L (18.5 US gal, 15.4 Imp.gal)
Engine oil quantity with oil filter replacement:
3.4 L (3.59 US qt, 2.99 Imp.qt)
Engine oil quantity without oil filter replacement:
3.2 L (3.38 US qt, 2.82 Imp.qt)
Engine oil total quantity:
3.7 L (3.91 US qt, 3.26 Imp.qt)
UF4G70E0.book Page 90 Monday, September 28, 2015 3:14 PM

Trouble recovery
91
EJU34562
Troubleshooting
If you have any trouble with your watercraft, use the troubleshooting chart to check for the
possible cause.
If you cannot find the cause, consult a Yamaha dealer.
EJU44120Troubleshooting chart
Confirm the possible cause and remedy, and then refer to the applicable page.
TROUBLE POSSIBLE CAUSE REMEDY PAGE
Engine does not
start (Starter motor
does not turn over)Ya m a h a S e -
curity System
(VX Deluxe /
VX Cruiser /
VX Limited)Lock mode selected Select unlock mode
26
Engine shut-
off switchClip not in place Install clip
27
Fuse Burned out Have serviced by
Yamaha dealer—
Battery Run down Recharge 81
Poor terminal con-
nectionsTighten as required
81
Terminal corroded Clean or replace 81
Starter motor Faulty Have serviced by
Yamaha dealer—
Engine does not
start (Starter motor
turns over)Throttle lever Squeezed Release 27
Faulty Have serviced by
Yamaha dealer—
RiDE lever Squeezed Release 27
Faulty Have serviced by
Yamaha dealer—
Fuel Fuel tank empty Refill as soon as pos-
sible50
Stale or contaminat-
edHave serviced by
Yamaha dealer—
Fuel tank Water or dirt present Have serviced by
Yamaha dealer—
Spark plug Fouled or defective Have serviced by
Yamaha dealer—
Fuel injec-
tion systemFuel pump faulty Have serviced by
Yamaha dealer—
UF4G70E0.book Page 91 Monday, September 28, 2015 3:14 PM

Trouble recovery
92
Engine runs irregu-
larly or stallsFuel Fuel tank empty Refill as soon as pos-
sible50
Stale or contaminat-
edHave serviced by
Yamaha dealer—
Fuel tank Water or dirt present Have serviced by
Yamaha dealer—
Spark plug Fouled or defective Have serviced by
Yamaha dealer—
Incorrect heat range Have serviced by
Yamaha dealer—
Gap incorrect Have 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 blinks or
comes onFuel level
warningFuel tank empty Refill as soon as pos-
sible50
Oil pressure
warningOil pressure dropped Have serviced by
Yamaha dealer41
Engine over-
heat warningJet intake clogged Clean
94
Check en-
gine warningFaulty sensors Have serviced by
Yamaha dealer41 TROUBLE POSSIBLE CAUSE REMEDY PAGE
UF4G70E0.book Page 92 Monday, September 28, 2015 3:14 PM

Trouble recovery
93
Watercraft slow or
loses powerWatercraft
operation
mode
(VX Deluxe /
VX Cruiser /
VX Limited)Low RPM Mode acti-
vatedDeactivate Low RPM
Mode
33
Cavitation Jet intake clogged Clean 94
Impeller damaged or
wornHave serviced by
Yamaha dealer94
Engine over-
heat warningEngine speed reduc-
tion control activatedClean jet intake and
cool engine41
Oil pressure
warningEngine speed reduc-
tion control activatedAdd oil
41
Spark plug Fouled or defective Have serviced by
Yamaha dealer—
Incorrect heat range Have serviced by
Yamaha dealer—
Gap incorrect Have serviced by
Yamaha dealer—
Electrical wir-
ingLoose connection Have serviced by
Yamaha dealer—
Fuel Stale or contaminat-
edHave serviced by
Yamaha dealer—
Air filter Clogged Have serviced by
Yamaha dealer—
Oil buildup Have serviced by
Yamaha dealer—
Throttle lever Faulty Have serviced by
Yamaha dealer— TROUBLE POSSIBLE CAUSE REMEDY PAGE
UF4G70E0.book Page 93 Monday, September 28, 2015 3:14 PM

Trouble recovery
94
EJU34625
Emergency proceduresEJU34635Cleaning the jet intake and impeller
WARNING
EWJ00783
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 water-
craft above trolling speed until they have
been removed.
[ECJ00654]
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
watercraft.
(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, sup-
port the bow so that the handlebars
are not bent or damaged.
[ECJ00662]
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Trouble recovery
95
(2) Remove any weeds or debris from
around the jet intake, drive shaft, impel-
ler, jet pump housing, and jet thrust noz-
zle.
If debris is difficult to remove, consult a
Yamaha dealer.
EJU43471Raising the reverse gate
If the RiDE system malfunctions and the re-
verse gate remains in the lowered position,
the watercraft will not be able to move for-
ward.
After raising the reverse gate so that the wa-
tercraft can move forward, immediately re-
turn to shore and have a Yamaha dealer
service the watercraft.
To raise the reverse gate:
(1) Stop the engine and remove the clip from
the engine shut-off switch.
(2) Enter the water and move to the rear of
the watercraft.
(3) Slide the shift rod joint toward the bow,
and then disconnect the shift rod joint
from the ball joint.(4) Raise the reverse gate to the forward po-
sition.
TIP:
While the shift rod is disconnected, the re-
verse gate will not move to the neutral po-
sition or reverse position even if the RiDE
lever is squeezed.
If the RiDE lever is squeezed while the shift
rod is disconnected, the watercraft will
move forward.
EJU34642Jumping the battery
If the watercraft battery has run down, the en-
gine can be started using a 12-volt booster
battery and jumper cables.
EJU34664Connecting the jumper cables
WARNING
EWJ01251
To avoid battery explosion and serious
damage to the electrical system:
Do not reverse the polarity of the jumper
cables when connecting to the batter-
ies.
Do not connect the negative (–) jumper
cable to the negative (–) terminal of the
watercraft battery.
Do not touch the positive (+) jumper ca-
ble to the negative (–) jumper cable.
1Shift rod joint
2Ball joint
12
1Reverse gate
2Forward position
1
2
UF4G70E0.book Page 95 Monday, September 28, 2015 3:14 PM