YAMAHA SUPERJET 2015 Service Manual

Pre-operation checks
35
EJU32282
Pre-operation check pointsEJU40686Pre-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 hood. (See page 24 for hoodremoval and installation procedures.)
(2) Perform the checks and make sure that there are no malfunctioning items or oth-
er problems.
(3) After completing these checks, install the hood in its original position.
EJU32334Engine compartment check
WARNING
EWJ00462
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.
EJU34208Fuel system checks
WARNING
EWJ00382
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:
Carburetor for leakage
Fuel filler cap and seal for damage
Fuel in fuel tank for water and dirt
Fuel tank for damage and leakage
Fuel hoses and joints for damage and leak-
age
Fuel filter for leakage
Fuel cock for leakage
Fuel tank breather hose for damage and
leakage
Releasing the pressure in the fuel tank
Release the pressure in the fuel tank before
each use.
To release the pressure in the fuel tank:
(1) Loosen the fuel filler cap slowly and re- move it to release any pressure in the fuel
tank.
(2) Securely install the fuel filler cap by tight- ening it until it stops.
EJU32365Fuel level check
Check the fuel level in the fuel tank.
1Fuel filler cap
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Pre-operation checks
36
Add fuel if necessary. (See page 29 for infor-
mation on filling the fuel tank.)
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 22 for in-
formation on draining the water separator.)
EJU40182Engine unit check
Check the exterior of the engine unit for dam-
age or other problem.
EJU41012Bilge water check
Make sure that no bilge water has collected in
the engine compartment. If bilge water has
collected in the engine compartment, wipe it
up with a dry cloth. NOTICE: Excessive wa-
ter in the engine compartment can splash
into the engine, which can result in severe
damage.
[ECJ00342]
EJU32485
Battery checks
Make sure that the battery terminals and
breather hose are not damaged and that the
battery leads and breather hose are connect-
ed properly. WARNING! Fire or explosion
could result if the breather hose is dam- aged, obstructed, or not connected prop-
erly.
[EWJ00452]
Make sure that the electrolyte level is be-
tween the minimum and maximum level
marks.
WARNING! Never operate the wa-
tercraft if the battery does not have suffi-
cient 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
1 Water separator
1Positive (+) battery terminal: Red lead
2 Negative (–) battery terminal: Black lead
3 Breather hose
1 Maximum level mark
2 Minimum level mark
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Pre-operation checks
37
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.
EJU32623Steering pole check
Move the steering pole up and down several
times to make sure that operation is smooth
and unrestricted throughout the whole range,
and that the free play is not excessive. Also,
make sure that the steering pole does not
have any side play.
EJU32595Throttle 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.
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
38
Make sure that there is the proper amount of
throttle lever free play when the throttle lever
is in the fully closed (idle) position.
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
falls off, allowing the watercraft to contin-
ue to run and cause an accident.
[EWJ01221] EJU41021
Switch checks
NOTICE
ECJ01361
Do not run the engine for more than 15
seconds on land 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 19 to 19 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.
EJU41211Storage pouch checks
Make sure that the storage pouch is not dam-
aged and that water has not collected in the
pouch. Also, make sure that the storage
1Throttle lever free play
Throttle lever free play:
7.0–10.0 mm (0.28–0.39 in)
1Engine shut-off switch
2 Clip
3 Start switch
4 Engine stop switch
5 Engine shut-off cord (lanyard)
123
4 5
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Pre-operation checks
39
pouch is securely installed. (See page 25 for
information on the storage pouch.)
EJU41072Fire extinguisher container checks
Make sure that the fire extinguisher container
is not damaged and is securely held in place.
(See page 26 for information on the fire extin-
guisher container.)
EJU32504Fire 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 in the fire extinguisher container.
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-
er dealer to obtain one meeting the proper
specifications.
EJU40122Safety equipment check
Check that safety equipment meeting the ap-
plicable regulations is on board.
EJU32353Hull and deck check
Check the hull and deck for damage or other
problem.
EJU32657Jet intake checks
Make sure that the jet intake is not damaged
or clogged with weeds or debris. If the jet in-take is clogged, clean it. (See page 66 for in-
formation on the jet intake.)
EJU40703Hood check
Make sure that the hood is securely closed.
(See page 24 for information on the hood.)
EJU40145Post-launch checks
Perform the post-launch checks in the pre-
operation checklist while the watercraft is in
the water and the engine is running.
To perform the post-launch checks:
(1) Launch the watercraft. (See page 41 for
information on launching the watercraft.)
(2) Perform the checks and make sure that there are no malfunctioning items or oth-
er problems.
EJU40553Cooling water pilot outlet check
Make sure that water is discharged from the
cooling water pilot outlet while the engine is
running. (See page 21 for information on the
cooling water pilot outlet.)
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Operation
40
EJU32903
Operating your watercraft
WARNING
EWJ00511
Before operating your watercraft, become
familiar with all of the controls. Consult a
Yamaha dealer about any control or func- tion that you do not fully understand. Fail-
ure to understand how the controls work
could cause an accident or prevent you
from avoiding an accident.
EJU32924Getting to know your watercraft
Operating your watercraft requires skills ac-
quired through practice over a period of time.
Take the time to learn the basic techniques
well before attempting more difficult maneu-
vers.
Operating your new watercraft can be a very
enjoyable activity, providing you with hours of
pleasure. However, it is essential to familiar-
ize yourself with the operation of the water-
craft to achieve the skill level necessary to
enjoy riding safely.
Before operating this watercraft, read this
owner’s/operator’s manual, the Riding Prac-
tice Guide, the Riding Instruction card, and all
labels on the watercraft. Pay particular atten-
tion to the safety information beginning on
page 8. These materials should give you an
understanding of the watercraft and its oper-
ation.
Remember: This watercraft is designed to
carry the operator only. Never have more
than one person on the watercraft at any
time.
EJU32985Learning to operate your watercraft
Before operating the watercraft, always per-
form the pre-operation checks listed on page
33. The short time spent checking the water- craft will reward you with added safety and
reliability.
Check local laws before operating your wa-
tercraft.
Operate defensively at safe speeds and keep
a safe distance away from people, objects,
and other watercraft. Select a wide area to
practice maneuvering in, where there is good
visibility and light boat traffic.
Use the buddy system—operate with some-
one nearby. Scan constantly for people, ob-
jects, and other watercraft. Be alert for
conditions that limit your visibility or block
your vision of others.
You should grip the handlebars firmly and get
to a standing or kneeling position quickly.
Keep both feet or knees on the riding tray
when the watercraft is in motion.
EJU33172Operating positions
After you are underway, you may choose to
kneel or stand, depending upon watercraft
speed, your skill level,
and your preference.
Here are some guidelines.
Kneeling
It is easier to maintain your balance when
kneeling than when standing. This position is
recommended when traveling at sub-planing
speeds. (At sub-planing speeds, there is a
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Operation
41
wake, but the watercraft is moving through
the water rather than skimming on top of it.)
At very slow speeds, it may be necessary to
support your upper-body weight with your el-
bows resting on the gunwales, trailing your
legs in the water.
Standing
After you are comfortable handling the water-
craft from a kneeling position, try standing as
the watercraft gains speed. The watercraft
will become easier to balance as the speed
increases, because jet thrust provides stabil-
ity as well as directional control. When you
are moving slowly, or preparing to stop, you
will probably need to return to the kneeling
position to maintain your balance.
EJU32822Launching 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.
After the watercraft is in the water, turn it
around so that the bow faces the direction
you wish to go.
EJU32836Starting the engine on water
WARNING
EWJ01521
Do not apply throttle when others are at
the rear of the watercraft. Turn the engine
off or keep it at idle. Water and debris ex-
iting the jet thrust nozzle can cause severe
injury.
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]
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Operation
42
(2) Turn the fuel cock knob to “ON”.
(3) Attach the engine shut-off cord (lanyard)to your left wrist, and then attach the clip
to the engine shut-off switch. (See page
19 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-
craft to continue to run and cause an
accident.
[EWJ00582]
(4) Pull the choke knob all the way out to start a cold engine.
TIP:
The choke should not be used when the en-
gine is warm.
(5) While lightly squeezing the throttle lever,push the start switch (green button) to
start the engine. (See page 19 for infor-
mation on operating the start switch.)
WARNING! Do not apply too much throttle when starting the engine, oth-
erwise the watercraft will accelerate
unexpectedly. This could cause a col-
lision or cause the operator to be
thrown overboard.
[EWJ00592]
(6) After the engine has warmed up, push the choke knob in to its original position.
TIP:
If the choke knob is left pulled out, the engine
will stall.
1Clip
2 Engine shut-off switch
3 Engine shut-off cord (lanyard)
12
3
START
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Operation
43
EJU32863Stopping the engine
Release the throttle lever, and then push the
engine stop switch (red button) to stop the
engine. WARNING! You need throttle to
steer. Shutting the engine off can cause
you to hit an obstacle you are attempting
to avoid. A collision could result in severe
injury or death.
[EWJ00602]
EJU32873
Leaving the watercraft
If leaving the watercraft, remove the clip from
the engine shut-off switch to prevent acci-
dental starting or unauthorized operation by
children or others.
EJU41172Operating the watercraft
When the engine is running, the watercraft
will move forward at trolling speed even if the throttle lever is in the fully closed (idle) posi-
tion.
EJU33244Turning the watercraft
WARNING
EWJ00762
Do not release the throttle lever when
trying to steer away from objects—you
need throttle to steer. A collision could
result in severe injury or death.
When operating at higher speeds, make
gradual turns or slow down before turn-
ing. Sharp high-speed turns may cause
the watercraft to slide sideways or spin,
throwing the operator overboard, which
could cause an injury.
Steering control depends on the combination
of handlebar position and the amount of
throttle.
Water sucked in through the intake grate is
pressurized by the impeller in the jet pump.
As the pressurized water is expelled from the
pump through the jet thrust nozzle, it creates
thrust to move and steer the watercraft. The
higher the engine speed, the more thrust pro-
duced.
The amount of jet thrust, in addition to the po-
sition of the handlebars, determines how
sharply you turn.
STOP
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Operation
44
A. More throttle produces higher thrust, sothe watercraft will turn more sharply.
B. Less throttle produces lower thrust, so the watercraft will turn more gradually.
C. Releasing the throttle lever completely produces only minimum thrust. If you are
traveling at speeds above trolling, you
will have rapidly decreasing ability to
steer without throttle. You may still have
some turning ability immediately after re-
leasing the throttle lever, but once the
engine slows down, the watercraft will no
longer respond to handlebar input until
you apply throttle again or you reach
trolling speed.
At trolling speed, the watercraft can be
turned gradually by handlebar position alone using just the amount of thrust
available at idle.
D. If the engine is stopped while riding, there is no thrust. The watercraft will go
straight even though the handlebars are
turned.
You need throttle to steer.
To maintain your balance, lean into a turn.
How much you lean depends on the sharp-
ness of the turn and yo ur traveling speed. In
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