2018 YAMAHA EX check engine

Operation
62
EJU40212Riding position
Operator riding position
The operator should grip the handlebars firm-
ly with both hands and sit astride the seat
with both feet on the floor of the footwell.
Passenger riding position
The passenger(s) should hold on firmly, either
to the person in front of them or to the hand-
grip provided, and sit astride the seat with
their feet on the floor of the footwell. Never al-
low a passenger to ride in front of the opera-
tor. (See page 17 for information on the riding
position when pulling a wakeboarder or wa-
ter-skier.)
EJU32803Launching the watercraft
When launching the watercraft, make sure
that there are no obstacles around you.
If the watercraft is launched from a trailer,
someone should make sure that waves do
not push the watercraft into the trailer.
EJU43580Starting the engine on water
WARNING
EWJ01531
Do not apply throttle when anyone is at the
rear of the watercraft. Turn the engine off
or keep it at idle. Water and debris exiting
the jet thrust nozzle can cause severe in-
jury.
To start the engine:
(1) Move the watercraft to an area that is
free from weeds and debris, and has a
water depth of at least 60 cm (2 ft) from
the bottom of the watercraft. NOTICE:
Never run the engine in water that is
less than 60 cm (2 ft) deep from the
bottom of the watercraft, otherwise
pebbles or sand could be sucked into
the jet intake, causing impeller dam-
age and engine overheating.
[ECJ00473]
(2) Attach the engine shut-off cord (lanyard)
to your left wrist, and then attach the clip
to the engine shut-off switch. (See page
25 for information on operating the en-
gine shut-off switch.) WARNING! Check
that the engine shut-off cord (lanyard)
is attached correctly. If the engine
shut-off cord (lanyard) is not attached
correctly, it may not pull free when the
operator falls off, allowing the water-
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Operation
67
proximately 90 m (300 ft) after the throttle le-
ver is released or the engine is stopped,
although this distance will vary depending on
many factors, including gross weight, water
surface conditions, and wind direction.
EX Deluxe: If the RiDE lever is squeezed to
slow down, the stopping distance is approxi-
mately 30% shorter than when the RiDE lever
is not used. However, this distance will vary
depending on many factors, including gross
weight, water surface conditions, and wind
direction.
WARNING
EWJ01970
Allow adequate stopping distance.
Take early action to avoid collisions. Re-
member, watercraft and other boats do
not have brakes.
Operate defensively at safe speeds and
keep a safe distance away from people,
objects, and other watercraft to give you
time to stop.
Do not shut the engine off when slowing
down in case you need engine power to
steer away from a boat or other obstacle
that comes into your path.
EX Sport: Do not use the reverse func-
tion to slow down or stop the watercraft
as it could cause you to lose control, be
ejected, or impact the handlebars.
EX Deluxe: To avoid rear-end collisions
while operating the watercraft, check
behind you before using the RiDE lever
to slow down or stop the watercraft.
EJU44682Operating the watercraft in reverse or
neutral (EX Sport / EX Deluxe)
Operating in reverse (EX Sport)
Pull the shift lever rearward to the reverse po-
sition. The watercraft will move in reverse.
(See page 29 for information on the reverse
system.)
Make sure that there are no obstacles or peo-
ple behind you before shifting into reverse.
TIP:
This model is not equipped with a neutral
function.
90 m (300 ft)
1Shift lever
2Reverse position
1
2
UF3Y71E0.book Page 67 Thursday, May 25, 2017 11:17 AM

Care and storage
76
ter flows out continually from the jet
thrust nozzle.
(7) 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
perform the procedure again from step 6.
NOTICE: Do not supply water to the
cooling water passages when the en-
gine is not running. The water could
flow back through the muffler into the
engine, causing severe engine dam-
age.
[ECJ00123]
(8) Turn the water supply off.
(9) Discharge the remaining water out of the
cooling water passages by alternately
squeezing and releasing the throttle lever
quickly for 10 to 15 seconds.
(10) Stop the engine.
(11) Remove the garden hose adapter, and
then securely install the flushing hose
connector cap by tightening it until it
stops.
(12) Securely install the seat storage com-
partment and seat in their original posi-
tions.
EJU44770Cleaning the watercraft
(1) Remove the seat and fire extinguisher
holder. (See page 38 for seat removal
and installation procedures and page 43for information on the fire extinguisher
holder.)
(2) If the watercraft will be stored for a week
or more, rustproof the internal engine
components to help prevent corrosion.
(See page 80 for information on rust-
proofing the internal engine compo-
nents.)
(3) Rinse the engine and engine compart-
ment with a small amount of water.
NOTICE: Do not use high-pressure
water when rinsing the engine or en-
gine compartment as severe engine
damage could result.
[ECJ00572]
(4) Drain the water from the engine com-
partment. (See page 48 for information
on draining the bilge water.)
(5) Wipe the engine and engine compart-
ment with a dry cloth.
(6) Wash down the hull, deck, and jet pump
with fresh water.
(7) Wipe the hull, deck, and jet pump with a
dry cloth.
(8) Wipe all vinyl and rubber components,
such as the seat and engine compart-
ment seals, with a vinyl protectant.
(9) To minimize corrosion, spray metallic
parts of the hull, deck, and engine with a
rust inhibitor.
(10) Allow the engine compartment to air dry
completely before installing the seat.
(11) Securely install the fire extinguisher hold-
er and seat in their original positions.
EJU33688Battery care
If the watercraft will not be used for more than
a month, remove the battery from the water-
craft, check it, and then store it in a cool, dry
place.
UF3Y71E0.book Page 76 Thursday, May 25, 2017 11:17 AM

Maintenance
82
EJU33769
Maintenance
Periodic checks and lubrication will keep
your watercraft in the safest and most effi-
cient condition possible. Therefore, make
sure to carry out the periodic maintenance.
Safety is an obligation of the watercraft own-
er. Proper maintenance must be carried out
to keep the exhaust emission and sound lev-
els within the regulated limits. The most im-
portant points of watercraft inspection and
lubrication are explained on the following pa-
ges.
See a Yamaha dealer for genuine Yamaha re-
placement parts and optional accessories
designed for your watercraft.
Remember, failures that are the result of the
installation of parts or accessories which are
not qualitatively equivalent to genuine
Yamaha parts are not covered by the limited
warranty.
Maintenance, replacement, or repair of
the emission control devices and system
may be performed by any marine SI engine
repair establishment or individual. War-
ranty repair, however, must be performed
at an authorized Yamaha marine dealer-
ship.
WARNING
EWJ00312
Be sure to turn off the engine when you
perform maintenance unless otherwise
specified. If you are not familiar with ma-
chine servicing, this work should be done
by a Yamaha dealer or other qualified me-
chanic.
EJU33803Tool kit
A tool kit is included with this watercraft. Pla-
ce the tool kit in a waterproof bag and alwayscarry it with you whenever you use the water-
craft.
1Tool bag
2Screwdriver
3Garden hose adapter
410/12 mm box wrench
5Pliers
610/12 mm open-end wrench
UF3Y71E0.book Page 82 Thursday, May 25, 2017 11:17 AM

Maintenance
83
EJU43101Periodic maintenance chart
The periodic maintenance chart gives general guidelines for periodic maintenance. Have a
Yamaha dealer perform the checks in the following chart. However, maintenance may need
to be performed more frequently depending on your operating conditions. If you have any
questions, consult a Yamaha dealer.
This “√” mark indicates items to be checked and serviced by a Yamaha dealer.
Item OperationInitial Thereafter every
Page
10 hours50 hours
or 12
months
*1100
hours or
12
months
*1200
hours or
24
months
*1
Fuel lineCheck fuel hoses and
clamps√—
Fuel filler cap/Wa-
ter separatorCheck O-rings for cracks
and deformation√—
Fuel tankCheck installation and
straps√—
Water inlet strainerCheck for clogs and dam-
age√—
Cooling water hos-
esCheck for damage and
leakage, and check
clamps√—
Engine oilReplace√√85
Oil filterReplace√85
Spark plugsCheck√√—
BatteryCheck state of charge,
terminals, bands, and
breather hose√—
Battery leadsCheck terminals√—
Steering masterCheck operation and for
looseness√√—
Steering cableCheck exterior and con-
nections, and lubricate√—
Shift lever (EX
Sport)Check exterior and con-
nections, and lubricate√—
Shift cable and re-
verse gate (EX
Sport)Check exterior and con-
nections, and lubricate√—
Shift rod and re-
verse gate
(EX Deluxe)Check exterior and con-
nections, and lubricate√—
Air filter elementCheck for damage and
dirt√—
UF3Y71E0.book Page 83 Thursday, May 25, 2017 11:17 AM

Maintenance
84
*1: Whichever comes first.
*2: Check every 200 hours.
Perform the pre-operation checks and post-operation checks before performing periodic
maintenance.
Air intake hosesCheck for damage, and
check clamps√—
Throttle bodyLubricate throttle valve√—
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
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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