engine YAMAHA EX LIMITED 2021 Owner's Guide

Operation and handling requirements
47
(9) Repeat steps 6–8 until the engine oil is atthe proper level.
(10) Securely install the oil tank filler cap and turn it until it stops.
(11) Securely install the seat storage com- partment and seat in their original posi-
tions.EJU40022
Draining the bilge waterECJ01302
Do not run the engine at full throttle when
bilge water remains in the engine com-
partment. The bilge water can splash into
the engine, which can result in severe
damage.
EJU44260Draining the bilge water on land
To drain the bilge water on land:
(1) Loosen the stern drain plugs and removethem.
(2) Raise the bow of the watercraft, such as by placing the watercraft on a slope, to
drain the bilge water from the engine
compartment.
(3) After the bilge water has drained from the stern drain plug holes, wipe up any re-
maining moisture in the engine compart-
ment with a dry cloth.
(4) Check that the stern drain plugs and O- rings on the plugs are not damaged and
that there is no foreign material on the
threads or O-rings on the plugs.
NOTICE: Before installing the stern
drain plugs, clean the drain plug
threads and the O-rings on the plugs
to remove any foreign materials, such
as dirt or sand. Otherwise, the stern
1 Stern drain plug
1
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Operation and handling requirements
48
drain plugs could be damaged, allow-
ing water to enter the engine compart-
ment. Check the O-rings on the stern
drain plugs and make sure that the
plugs are tightened securely before
launching the watercraft. Otherwise,
water may flood the engine compart-
ment and cause the watercraft to sub-
merge.
[ECJ00363]
(5) Securely install the stern drain plugs bytightening them until they stop.
EJU40535Draining the bilge water on water
A small quantity of bilge water will remain in
the engine compartment even after the bilge
water is drained on water. To completely
drain the bilge water, remove the watercraft
from the water and drain the bilge water on
land.
Jet vacuum bilge draining system
While the watercraft is operating, bilge water
in the engine compartment is drawn in by the
vacuum that is generated in the jet pump and
discharged from the watercraft through the
jet thrust nozzle.
To drain the bilge water on water:
Operate the watercraft as straight as possible
and above planing speed for at least 2 min-
utes. NOTICE: Do not run the engine at full
throttle for at least 1 minute after the en-
gine has been restarted. Bilge water in the engine compartment can splash into the
engine, which can result in severe dam-
age.
[ECJ00554]
1
O-ring
1
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First-time operation
50
EJU32786
Engine break-inECJ00432
Failure to perform the engine break-in
could result in reduced engine life or even
severe engine damage.
The engine break-in is essential to allow the
various components of the engine to wear
and polish themselves to the correct operat-
ing clearances. This ensures proper perfor-
mance and promotes longer component life.
To perform the engine break-in:
(1) Check the engine oil level. (See page 45for information on checking the engine
oil level.)
(2) Launch the watercraft and start the en- gine. (See page 61 for information on
starting the engine.)
(3) For the first 5 minutes, operate with the engine at idling speed.
(4) For the next 30 minutes, operate with the engine speed below 5000 r/min.
(5) For the next 1 hour, operate with the en- gine speed below 6500 r/min.
After the engine break-in is complete, the wa-
tercraft can be operated normally.
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Pre-operation checks
51
EJU31982
EWJ00412
Failure to inspect or maintain the watercraft properly increases the possibility of an ac-
cident or damage to the watercraft. Do not operate the watercraft if you find any prob-
lem. If a problem cannot be corrected by the procedures provided in this manual, have
the watercraft inspected by a Yamaha dealer.
EJU41235Pre-operation checklist
Before using this watercraft, be sure to perform the checks in the following checklist.
ITEMROUTINEPAGE
PRE-LAUNCH CHECKS
Engine compartment Ventilate the engine compartment.
Check inside the engine compartment for damage.
53
Fuel system Check the fuel system for leakage.
Check the fuel level in the fuel tank.
53
Water separator Check the water separator for water. 54
Engine unit Check the exterior of the engine unit for damage. 54
Engine oil level Check the engine oil level. 54
Bilge water Check the engine compartment for bilge water. 54
Battery Check the battery connections. 54
Steering system Check the steering system for proper operation. 55
Reverse system (EX
SPORT) Check the reverse system for proper operation.
55
RiDE lever (EX DELUXE /
EX LIMITED) Check the RiDE lever for proper operation.
56
Throttle lever Check the throttle lever for proper operation. 56
Engine shut-off cord (lan-
yard) Check the engine shut-off cord (lanyard) for dam-
age.
56
Switches Check the start switch, engine stop switch, and en-
gine shut-off switch for proper operation.
57
Storage compartments Check the storage compartments for damage and
water.
57
Fire extinguisher holder Check the fire extinguisher holder for damage. 57
Fire extinguisher Check the condition of the fire extinguisher. 57
Safety equipment Check that safety equipment meeting the applica-
ble regulations is on board.
58
Hull and deck Check the hull and deck for damage. 58
Jet intake Check the jet intake for damage and clogging. 58
Jet thrust nozzle and re-
verse gate (EX SPORT / EX
DELUXE / EX LIMITED) Check the jet thrust nozzle and reverse gate for
damage.
58
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Pre-operation checks
52
TIP:
To ensure safety and reliability, pre-operation checks should be made each time the water-
craft is used.
Stern drain plugs Check the stern drain plugs for damage and foreign
material and check that they are securely installed.
58
Hood Check that the hood is securely closed. 58
Seat Check that the seat is securely installed. 37
POST-LAUNCH CHECKS
Cooling water pilot outlet Check that water is discharged from the cooling
water pilot outlet while the engine is running.
59
Multifunction information
center Check the multifunction information center for prop-
er operation.
59
Shift system (EX DELUXE /
EX LIMITED) Check the shift system for proper operation. 59
Engine idling speed Check the engine idling speed. 59
ITEM ROUTINE PAGE
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Pre-operation checks
53
EJU32282
Pre-operation check pointsEJU44551Pre-launch checks
Perform the pre-launch checks in the pre-op-
eration checklist while the watercraft is on
land.
To perform the pre-launch checks:
(1) Remove the seat, seat storage compart-ment, and fire extinguisher holder. (See
page 37 for seat removal and installation
procedures, page 41 for information on
the seat storage compartment, and page
42 for information on the fire extinguisher
holder.)
(2) Perform the checks and make sure that there are no malfunctioning items or oth-
er problems.
(3) After completing these checks, securely install the seat storage compartment, fire
extinguisher holder, and seat in their
original positions.
EJU32334Engine compartment checkEWJ00462
Failure to ventilate the engine compart-
ment could result in a fire or explosion. Do
not start the engine if there is a fuel leak.
Ventilate the engine compartment. Leave the
engine compartment open for a few minutes
to allow any fuel vapors to escape. Make sure that there is no damage inside the
engine compartment.
EJU34215Fuel system checksEWJ00382
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.
Make sure that there is no damage, leakage,
or other problem in the fuel system.
Check:
Fuel filler cap and seal for damage
Fuel tank for damage and leakage
Fuel hoses and joints for damage and leak-
age
Fuel tank breather hose for damage and
leakage
EJU36875Fuel level check
Check the fuel level in the fuel tank.
Add fuel if necessary. (See page 43 for infor-
mation on filling the fuel tank.)
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Pre-operation checks
54
EJU32424Water separator check
Make sure that no water has collected in the
water separator. If water has collected in the
water separator, drain it. (See page 26 for in-
formation on draining the water separator.)
EJU40182Engine unit check
Check the exterior of the engine unit for dam-
age or other problem.
EJU41561Engine oil level check
Make sure that the engine oil level is between
the minimum and maximum level marks on
the dipstick attached to the oil tank filler cap.
(See page 45 for information on checking the
engine oil level.)
EJU32456Bilge water check
Make sure that no bilge water has collected in
the engine compartment. If bilge water has
collected in the engine compartment, drain it.
(See page 47 for information on draining the
bilge water.)
EJU32486Battery checks
Make sure that the battery terminals are not
damaged and that the battery leads are con-
nected properly. WARNING! Never operate
1Water separator
1
1Oil tank filler cap/Dipstick
1 Dipstick
2 Maximum level mark
3 Minimum level mark
1
213
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Pre-operation checks
55
the watercraft if the battery does not have
sufficient power to start the engine or if it
shows any other signs of decreased pow-
er. Loss of battery power may leave you
stranded.
[EWJ01241]
Make sure that the battery is securely held in
place.
EJU32614Steering system checks
Turn the handlebars to the right and left sev-
eral times to make sure that operation is
smooth and unrestricted throughout the
whole range, and that the free play is not ex-
cessive.
Turn the handlebars as far as possible to the
right and left to make sure that the jet thrust
nozzle moves as the handlebars are turned,
and that there is no difference between the right and left fully turned positions of the jet
thrust nozzle.
EJU32636Reverse system checks (EX SPORT)EWJ00032
Do not touch the reverse gate while the
shift lever is being operated, otherwise
you could be pinched.
1
Negative (–) battery terminal: Black lead
2 Positive (+) battery terminal: Red lead
1
2
Difference between fully turned posi-
tions of jet thrust nozzle (distances A
and B):
Maximum 5 mm (0.20 in)
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Pre-operation checks
56
Operate the shift lever several times to make
sure that operation is smooth throughout the
whole range. Also, make sure that the reverse
gate moves up and down according to the
operation of the shift lever and that the gate
makes contact with the stoppers. (See page
28 for reverse system operation.)
EJU43213RiDE lever checks (EX DELUXE / EX LIMITED)
Operate the RiDE lever several times to make
sure that operation is smooth throughout thewhole range. Also, make sure that the RiDE
lever returns automatically to its fully closed
position when released.
EJU42181Throttle lever checks
Operate the throttle lever several times to
make sure that operation is smooth through-
out the whole range. Also, make sure that the
throttle lever returns automatically to its fully
closed (idle) position when released.
EJU32664Engine shut-off cord (lanyard) check
Make sure that the engine shut-off cord (lan-
yard) is not damaged. If the cord is damaged,
replace it.
WARNING! Never try to repair
the engine shut-off cord (lanyard) or tie it
together. The engine shut-off cord (lan-
yard) may not pull free when the operator
1 Stopper
1
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Pre-operation checks
57
falls off, allowing the watercraft to contin-
ue to run and cause an accident.
[EWJ01221]
EJU40692
Switch checksECJ01311
Do not run the engine over 4000 r/min on
land. Also, do not run the engine for more
than 15 seconds 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. (See pages 24 to 24 for in-
formation on operating each switch.)
To check the operation of the switches:
(1) Push the start switch to make sure that the engine starts. (2) As soon as the engine starts running,
push the engine stop switch to make
sure that the engine stops immediately.
(3) Restart the engine, and then pull the en- gine shut-off cord (lanyard) to remove
the clip from the engine shut-off switch
to make sure that the engine stops im-
mediately.
EJU40102Storage compartment checks
Make sure that the storage compartments
are not damaged and that water has not col-
lected in the compartments. (See page 39 for
information on the storage compartments.)
EJU44670Fire extinguisher holder checks
Make sure that the fire extinguisher holder is
installed in the correct direction and is not
damaged. (See page 42 for information on
the fire extinguisher holder.)
EJU44630Fire extinguisher check
Check that there is a full fire extinguisher on
board.
To check the fire extinguisher, see the in-
structions supplied by the fire extinguisher
manufacturer. Always keep the fire extin-
guisher stored in the holder.
Always carry a fire extinguisher on board. A
fire extinguisher is not standard equipment
with this watercraft. If you do not have one,
contact a Yamaha dealer or a fire extinguish-
1Start switch
2 Engine stop switch
3 Engine shut-off switch
4 Clip
5 Engine shut-off cord (lanyard)
1
3
4
25
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