YAMAHA EX 2018 Owners Manual

Maintenance
85
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.
UF3Y71E0.book Page 85 Thursday, May 25, 2017 11:17 AM

Specifications
86
EJU34543
Specifications
Watercraft capacity:
Maximum people on board:
3 person
Maximum load capacity:
220 kg (486 lb)
Dimensions and weight:
Length:
3130 mm (123.2 in) (EX)
3140 mm (123.6 in) (EX Sport / EX Deluxe)
Width:
1130 mm (44.5 in)
Height:
1150 mm (45.3 in)
Dry weight:
262 kg (578 lb) (EX)
265 kg (584 lb) (EX Sport)
272 kg (600 lb) (EX Deluxe)
Performance:
Maximum output (according to ISO 8665/SAE
J1228):
74.6 kW at 7300 r/min
Maximum fuel consumption:
28.5 L/h (7.5 US gal/h, 6.3 Imp.gal/h)
Cruising range at full throttle:
1.75 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 SG, SH, SJ, SL
Fuel tank total capacity:
50 L (13.2 US gal, 11.0 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)
UF3Y71E0.book Page 86 Thursday, May 25, 2017 11:17 AM

Trouble recovery
87
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.
EJU44430Troubleshooting 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)Engine shut-
off switchClip not in place Install clip
25
Fuse Burned out Have serviced by
Yamaha dealer—
Battery Run down Recharge 76
Poor terminal con-
nectionsTighten as required
76
Terminal corroded Clean or replace 76
Starter motor Faulty Have serviced by
Yamaha dealer—
Engine does not
start (Starter motor
turns over)Throttle lever Squeezed Release 25
Faulty Have serviced by
Yamaha dealer—
RiDE lever
(EX Deluxe)Squeezed Release 25
Faulty Have serviced by
Yamaha dealer—
Fuel Fuel tank empty Refill as soon as pos-
sible44
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—
UF3Y71E0.book Page 87 Thursday, May 25, 2017 11:17 AM

Trouble recovery
88
Engine runs irregu-
larly or stallsFuel Fuel tank empty Refill as soon as pos-
sible44
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-
sible44
Oil pressure
warningOil pressure dropped Have serviced by
Yamaha dealer36
Engine over-
heat warningJet intake clogged Clean
90
Check en-
gine warningFaulty sensors Have serviced by
Yamaha dealer37 TROUBLE POSSIBLE CAUSE REMEDY PAGE
UF3Y71E0.book Page 88 Thursday, May 25, 2017 11:17 AM

Trouble recovery
89
Watercraft slow or
loses powerCavitation Jet intake clogged Clean 90
Impeller damaged or
wornHave serviced by
Yamaha dealer90
Engine over-
heat warningEngine speed reduc-
tion control activatedClean jet intake and
cool engine36
Oil pressure
warningEngine speed reduc-
tion control activatedAdd oil
36
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
UF3Y71E0.book Page 89 Thursday, May 25, 2017 11:17 AM

Trouble recovery
90
EJU34625
Emergency proceduresEJU44590Cleaning 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: When turning the watercraft
on its side, support the bow so that
the handlebars are not bent or dam-
aged.
[ECJ02690]
(2) Remove any weeds or debris from
around the jet intake, drive shaft, impel-
UF3Y71E0.book Page 90 Thursday, May 25, 2017 11:17 AM

Trouble recovery
91
ler, jet pump housing, and jet thrust noz-
zle.
If debris is difficult to remove, consult a
Yamaha dealer.
EJU43472Raising the reverse gate (EX Deluxe)
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
UF3Y71E0.book Page 91 Thursday, May 25, 2017 11:17 AM

Trouble recovery
92
(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.
(4) Start the engine, and then disconnect the
jumper cables by reversing the steps
above. (See page 25 for information on
starting the engine.)
EJU34716Towing the watercraft
WARNING
EWJ00812
The operator of the towing boat must
keep speed to a minimum and avoid
traffic or obstacles which could be a
hazard to the operator on the water-
craft.
The towline should be long enough so
that the watercraft will not collide with
the towing boat when slowing down.
If the watercraft becomes inoperative in the
water, it can be towed to shore.To tow the watercraft:
Use a towline that is three times the com-
bined length of the towing boat and the wa-
tercraft.
(1) Securely attach the towline to the bow
eye of the watercraft being towed.
(2) Sit astride the seat and hold on to the
handlebars in order to balance the water-
craft. NOTICE: The bow must be kept
up out of the water during towing, oth-
erwise water could flood the engine
compartment or water could flow
back into the engine, causing severe
engine damage.
[ECJ01331]
Tow the watercraft at 8 km/h (5 mph) or less.
NOTICE: Tow the watercraft at 8 km/h (5
mph) or less, otherwise water could flood
the engine compartment or water could
flow back into the engine, causing severe
engine damage.
[ECJ01322]
EJU42101
Submerged watercraft
If the watercraft is submerged or flooded with
water, drain the bilge water from the engine
compartment. Then, have a Yamaha dealer
service the watercraft as soon as possible.
If the watercraft was submerged:
(1) Remove the watercraft from the water
and drain the water from the storage
compartments.
1Positive (+) jumper cable
2Booster battery
3Negative (–) jumper cable
4Engine hanger
123
4
1Bow eye
1
UF3Y71E0.book Page 92 Thursday, May 25, 2017 11:17 AM

Trouble recovery
93
(2) Drain the bilge water from the engine
compartment. (See page 48 for informa-
tion on draining the bilge water.)
(3) Have the watercraft serviced by a
Yamaha dealer as soon as possible.
NOTICE: Be sure to have a Yamaha
dealer inspect the watercraft. Other-
wise, serious engine damage could
result.
[ECJ00792]
UF3Y71E0.book Page 93 Thursday, May 25, 2017 11:17 AM

94
Index
A
After removing the watercraft from the
water ..................................................... 74
B
Battery care.............................................. 76
Battery checks ......................................... 54
Battery, jumping ....................................... 91
Beaching and docking the watercraft ...... 73
Bilge water check..................................... 54
Bilge water, draining ................................ 48
Bilge water, draining on land ................... 48
Bilge water, draining on water ................. 48
Boarding alone ......................................... 69
Boarding and starting off from a dock ..... 72
Boarding the watercraft ........................... 68
Boarding with passenger(s) ..................... 69
Bow eye ................................................... 39
Bow storage compartment ...................... 40
Builder’s plate ............................................ 2
C
Capsized watercraft ................................. 72
Check engine warning ............................. 37
Cleaning ................................................... 79
Cleaning the watercraft ............................ 76
Cleat ......................................................... 40
Cooling water pilot outlet ......................... 27
Cooling water pilot outlet check .............. 59
Craft Identification Number (CIN)............... 1
Cruising limitations................................... 11
E
Emergency procedures ............................ 90
Engine break-in ........................................ 50
Engine compartment check ..................... 53
Engine idling speed check ....................... 60
Engine oil ................................................. 46
Engine oil and oil filter .............................. 85
Engine oil level check............................... 54
Engine oil requirements ........................... 46
Engine overheat warning ......................... 36
Engine serial number ................................. 1
Engine shut-off cord (lanyard) check ....... 57
Engine shut-off switch ............................. 25
Engine stop switch................................... 25
Engine unit check..................................... 54
Enjoy your watercraft responsibly............ 19Equipment ................................................ 38
F
Fire extinguisher check ............................ 58
Fire extinguisher holder............................ 43
Fire extinguisher holder checks ............... 58
Flushing the cooling water passages....... 75
Fuel .......................................................... 44
Fuel level check........................................ 53
Fuel level meter ........................................ 35
Fuel level warning..................................... 36
Fuel requirements .................................... 44
Fuel system checks ................................. 53
G
Getting to know your watercraft .............. 61
Glossary, watercraft ................................. 20
Glove compartment ................................. 41
H
Handgrip .................................................. 38
Hazard information................................... 15
Hood check .............................................. 59
Hour meter and voltmeter ........................ 34
Hull and deck check ................................ 58
I
Identification numbers ............................... 1
Information display................................... 33
J
Jet intake and impeller, cleaning.............. 90
Jet intake checks ..................................... 58
Jet thrust nozzle and reverse gate
check (EX Sport / EX Deluxe) ............... 58
Jumper cables, connecting ...................... 91
L
Labels, important ....................................... 4
Labels, other .............................................. 9
Labels, warning .......................................... 5
Launching the watercraft ......................... 62
Learning to operate your watercraft......... 61
Leaving the watercraft.............................. 63
Limitations on who may operate the
watercraft .............................................. 10
Long-term storage ................................... 79
Lubrication ............................................... 79
M
Main components, location of ................. 21
Maintenance............................................. 82
UF3Y71E0.book Page 94 Thursday, May 25, 2017 11:17 AM