2018 YAMAHA SUPERJET light

Safety information
9
EJU30762
Cruising limitations
Scan constantly for people, objects, and
other watercraft. Be alert for conditions
that limit your visibility or block your vision
of others.
Operate defensively at safe speeds and
keep a safe distance away from people,
objects, and other watercraft.
Do not follow directly behind watercraft or
other boats.
Do not go near others to spray or splash
them with water.
Avoid sharp turns or other maneuvers that
make it hard for others to avoid you or un-
derstand where you are going.
Avoid areas with submerged objects or
shallow water.
Take early action to avoid collisions. Re-
member, watercraft and other boats do not
have brakes.
Do not release the throttle lever when trying
to steer away from objects—you need
throttle to steer. Always check throttle and
steering controls before starting the water-
craft.
Ride within your limits and avoid aggres-
sive maneuvers to reduce the risk of loss of
control, ejection, and collision.
This is a high performance boat—not a toy.
Sharp turns or jumping wakes or waves
can increase the risk of back/spinal injury(paralysis), facial injuries, and broken legs,
ankles, and other bones. Do not jump
wakes or waves.
Do not operate the watercraft in rough wa-
ter, bad weather, or when visibility is poor;
this may lead to an accident causing injury
or death. Be alert to the possibility of ad-
verse weather. Take note of weather fore-
casts and the prevailing weather
conditions before setting out on your wa-
tercraft.
As with any water sport, you should not op-
erate your watercraft without someone else
nearby. If you operate further than swim-
ming distance from shore, you should be
accompanied by another boat or water-
craft, but make sure you stay a safe dis-
tance away. It’s good, common sense.
Never operate in water that is less than 60
cm (2 ft) deep from the bottom of the wa-
tercraft, otherwise you increase your chan-
ce of hitting a submerged object, which
could result in injury.
This watercraft is not equipped with light-
ing required for night operation. Do not op-
erate the watercraft after sunset or before
dawn, otherwise you increase the risk of
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Description
16
EJU40653
Watercraft glossary
Trolling speed
“Trolling” is the lowest maneuvering speed. You are applying little or no throttle. The water-
craft is down in the water, and there is no wake.
Sub-planing speed
“Sub-planing” is a medium speed. The bow of the watercraft is slightly up from the water sur-
face, but you are still traveling through the water. There is a wake.
Planing speed
“Planing” is a faster speed. The watercraft is more level and is skimming on top of the water.
There is a wake.
Bow
The front end of the watercraft.
Stern
The rear end of the watercraft.
Starboard
The right side of the watercraft when facing forward.
Port
The left side of the watercraft when facing forward.
Bilge water
Water that has collected in the engine compartment.
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Equipment operation
25
(2) Unfasten the bands, and then remove
the storage pouch.
To install the storage pouch:
(1) Bend the owner’s/operator’s manual
slightly to insert it into the storage pouch,
and then add the tool kit and any other
small items. Fold the pouch, and then
wrap the strap around it.
(2) Install the storage pouch on the hood
and secure it with the bands.
(3) Securely install the hood in its original
position.
EJU41004Fire extinguisher container
The fire extinguisher container is located on
the hood.To open the fire extinguisher container:
(1) Lift the steering pole and support it with
the lock pin.
(2) Grasp the tab, pull the band to the rear,
and then pull it up.
(3) Lift the fire extinguisher container about
30 degrees from the storage position.
NOTICE: Do not force the fire extin-
guisher container up more than 30 de-
grees from the storage position,
otherwise the container and hood
could be damaged.
[ECJ00402]
1Storage pouch
2Band
1Strap
1Steering pole
2Lock pin
1Fire extinguisher container
2Ta b
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Operation and handling requirements
28
EJU318732-stroke engine oil
If YAMALUBE 2-W engine oil is not available,
another 2-stroke engine oil with an NMMA-
certified TC-W3 rating may be used.
EJU31903Mixing fuel and oil
NOTICE
ECJ00332
Make sure that the gasoline and oil are
thoroughly mixed in the correct ratio, oth-
erwise severe engine damage could re-
sult.
To mix gasoline and engine oil:
(1) Pour 2-stroke engine oil into a clean con-
tainer, and then add gasoline.
(2) To mix them thoroughly, shake the con-
tainer from side to side.
EJU31917Filling the fuel tank
To fill the fuel tank:
(1) Before refueling, stop the engine. Do not
stand or sit on the watercraft. Never refu-
el while smoking, or while in the vicinity
of sparks, open flames, or other sources
of ignition.
(2) Place the watercraft in a well-ventilated
area and in a horizontal position.
(3) Remove the hood, and then check the
fuel level. (See page 23 for hood removal
and installation procedures.)
(4) Loosen the fuel filler cap and remove it.
(5) Slowly add fuel to the fuel tank.
(6) Stop filling when the fuel level just reach-
es the bottom of the filler tube. Do not fill
up the filler tube. Because fuel expands
when it heats up, heat from the engine or
the sun can cause fuel to spill out of the
fuel tank. Do not leave the watercraft
with a full tank in direct sunlight.
(7) Wipe up any spilled fuel immediately with
a dry cloth. Recommended engine oil:
YAMALUBE 2-W or TC-W3 outboard
motor oil or equivalent
Fuel-to-oil ratios (gasoline to oil)
Break-in period (first two tankfuls):
25:1
After break-in:
50 : 1
12-stroke engine oil
2Gasoline
1Fuel filler cap
Fuel tank capacity:
To t a l :
18 L (4.8 US gal, 4.0 Imp.gal)
Reserve:
5.5 L (1.5 US gal, 1.2 Imp.gal)
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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
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
2Engine shut-off switch
3Engine shut-off cord (lanyard)
12
3
START
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Operation
48
(5) Bring your knees up onto the riding tray
and change to a kneeling position as
soon as you can do so.
(6) Move as far forward as possible without
interfering with the movement of the han-
dlebars. Keep your body perpendicular
to the water, with your weight forward
and low.
(7) Once the bow drops, and the watercraft
has leveled out in the water and reached
planing speed, back off the throttle and
select your desired speed.
TIP:
The watercraft will become easier to balan-
ce as the speed increases, because jet
thrust provides stability as well as direc-
tional control.
It will take longer for a heavy operator to
reach planing speed than it will for a light
operator.
EJU33205Capsized watercraft
WARNING
EWJ00672
Improper uprighting can cause injury.
Be sure to shut the engine off by pulling
on the engine shut-off cord (lanyard) to
remove the clip from the engine shut-off
switch.
Do not put your hands in the intake
grate.
If the watercraft capsizes, turn it over imme-
diately.
To upright the watercraft:
(1) Remove the clip from the engine shut-off
switch.
(2) Swim to the rear of the watercraft. Turn
the watercraft over clockwise.
If the port (left) side of the capsized wa-
tercraft is tilting up, push down on the
gunwale so that the port (left) side is
down before turning the watercraft
clockwise. NOTICE: Do not turn the
watercraft over counterclockwise,
otherwise water can enter the engine,
which can result in severe damage.
[ECJ00542]
(3) Start the engine and operate the water-
craft at planing speed to drain the bilge
water in the engine compartment. (See
page 29 for information on draining the
bilge water. If the engine does not start,
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Maintenance
60
EJU3437AChecking the spark plugs
WARNING
EWJ00351
Be careful not to damage the insulator
when removing or installing a spark plug.
A damaged insulator could allow sparks to
escape, which could result in a fire or ex-
plosion.
Remove and check the condition of the spark
plugs.
The condition of a spark plug can indicate
something about the condition of the engine.
For example, if the center electrode portion is
very white, this could indicate an intake air
leak or carburetion problem in that cylinder.
Do not attempt to diagnose any problems
yourself. Have a Yamaha dealer service the
watercraft.
To remove a spark plug:
(1) Remove the hood. (See page 23 for hood
removal and installation procedures.)
(2) Remove the spark plug cap.
(3) Remove the spark plug, and then check
the condition of the spark plug and the
spark plug gap. If the electrode portion is
significantly discolored, if electrode ero-
sion becomes excessive, if carbon and
other deposits are excessive, or if the
spark plug gap is not within the specified
range, replace the spark plug.
TIP:
When the engine is operating normally, the
color of the spark plug electrode portion will
be a medium-to-light tan.
To install a spark plug:
(1) Wipe off any dirt from the threads, insu-
lator, and gasket surface of the spark
plug.
(2) Install the spark plug, and then tighten it
to the specified torque.
TIP:
If a torque-wrench is not available when you
are reinstalling a spark plug, a good estimate
of the correct torque is 1/12 turn past finger-
tight. When you are installing a new spark
plug, a good estimate of the correct torque is
1/2 to 2/3 turn past finger-tight.
(3) Wipe off any water or dirt inside the
spark plug cap.
1Insulator
2Electrode
3Spark plug gap
Specified spark plug:
BR7HS
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Tightening torque:
Spark plug:
25.0 N·m (2.55 kgf·m, 18.4 lb·ft)
UF4D74E0.book Page 60 Tuesday, March 21, 2017 9:35 AM