2008 YAMAHA SUPERJET ECU

Features and functions
17
EJU31020
Operation of controls and other
functions
EJU31052Hood
The hood is secured at the rear by a latch.
Lift the steering pole and support it with the
lock pin before removing the hood.To remove the hood:
(1) Turn the latch knob to the open position,
and then pull up on the hood latch to un-
latch the hood.
(2) Grasp the hood using the handgrips pro-
vided at the front and rear of the hood. Lift
the hood up and to the rear to remove it.
1Steering pole
1Lock pin
1Hood latch knob
2Hood latch
1Handgrip
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Features and functions
18
To install the hood:
(1) Position the hood on the deck so that the
two projections at the front of the hood fit
under the two stays on the deck.
(2) Push down on the hood latch, and then
turn the knob to the lock position.
NOTE:
Make sure that the hood is properly secured
before operating the watercraft.
EJU31090Fuel tank filler cap
To remove the fuel tank filler cap, turn it coun-
terclockwise.
NOTE:
Make sure that the fuel tank filler cap is se-
curely closed before operating the watercraft.
EJU31120Fuel cock knob
The fuel cock supplies fuel from the fuel tank
to the carburetors.
1Fuel tank filler cap
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Features and functions
23
check the intake grate and impeller for clog-
ging.
WARNING
EWJ00050
Before attempting to remove weeds or de-
bris from the intake grate or impeller, shut
the engine off and remove the clip from the
engine shut-off switch. Severe injury or
death could result from coming in contact
with the rotating parts of the jet pump.
CAUTION:
ECJ00040
If you cannot locate and correct the cause
of the overheating, consult a Yamaha deal-
er. Continuing to operate at higher speeds
could result in severe engine damage.
EJU31671Storage pouch
A storage pouch is provided on the underside
of the hood for the owner’s/operator’s manual,
tool kit, and other small items.
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. Install the storage pouch on the
hood and secure it with the bands.
1Storage pouch
1Band
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Operation
25
EJU31790
Fuel and oil EJU31831Gasoline
WARNING
EWJ00290
GASOLINE AND ITS VAPORS ARE HIGH-
LY FLAMMABLE AND EXPLOSIVE!

Do not smoke when refueling, and keep
away from sparks, flames, and other
sources of ignition.

Stop the engine before refueling.

Refuel in a well-ventilated area with the
watercraft in a horizontal position.

Do not stand or sit on the watercraft
while refueling in case of fire.

Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with
dry rags. Always properly dispose of
gasoline-soaked rags.

Avoid overfilling the fuel tank. Stop fill-
ing when the fuel level just reaches the
bottom of the filler tube. Do not fill up the
filler tube because fuel expands as it
warms up and could overflow. If tempo-
rarily leaving the watercraft with a full
fuel tank, do not leave it in direct sun-
light. Leave it in a well-ventilated area
with the watercraft in a horizontal posi-
tion.

Tighten the fuel tank filler cap securely
after refueling.

If you should swallow some gasoline, in-
hale a lot of gasoline vapor, or get gaso-
line in your eyes, get immediate medical
attention.

If any gasoline spills on your skin or
clothing, immediately wash the affected
area with soap and water and change
your clothes.
CAUTION:
ECJ00310
Use only fresh gasoline that has been
stored in clean containers.
EJU31860Gasohol
There are two types of gasohol: gasohol con-
taining ethanol and that containing methanol.
Gasohol containing ethanol can be used if
ethanol content does not exceed 10% and the
fuel meets the minimum octane ratings.
Gasohol containing methanol is not recom-
mended by Yamaha because it can cause
fuel system damage and engine performance
problems.
EJU318702-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.
EJU31900Mixing fuel and oil
CAUTION:
ECJ00330

Avoid using any mixture of gasoline and
oil other than those specified.

Make sure that the gasoline and oil are
thoroughly mixed in the correct ratio,
otherwise the following problems may
occur. Too little oil in the fuel-to-oil ratio
could result in major engine trouble,
such as seizure. Too much oil in the fuel-Recommended gasoline:
Regular unleaded gasoline with a mini-
mum octane rating of
86 (Pump octane number) = (R +
M)/2
90 (Research octane number)
Recommended engine oil:
YAMALUBE 2-W or TC-W3 outboard
motor oil or equivalent
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Operation
27
EJU31980
Pre-operation checks EJU31990Pre-operation check list
Before operating this watercraft, perform the checks in the following check list. See the accom-
panying text in this chapter for details on how to perform the checks.
WARNING
EWJ00410
If any item in the pre-operation check list is not working properly, have it inspected and
repaired before operating the watercraft, otherwise an accident could occur.
NOTE:
Pre-operation checks should be made each time the watercraft is used. These checks can be
completed in a short time. It is worth the time spent to ensure safety and reliability.
ITEM ROUTINE PAGE
BEFORE LAUNCH OR OPERATION
Engine compartmentRemove the hood to ventilate the engine compart-
ment. Check for fuel vapors and loose electrical con-
nections.28
BilgeCheck for water and fuel and drain if necessary. 29
Throttle leverCheck that the throttle lever springs back smoothly. 30
Steering systemCheck for proper operation. 30
FuelCheck the fuel level and replenish if necessary.
Check the hoses and tank for leakage.28
Water separatorCheck for water and drain if necessary. 28
BatteryCheck the electrolyte level and battery condition. 29
HoodCheck that the hood is securely closed. 17
Hull and deckCheck the hull and deck for cracks and other dam-
age.28
Jet intakeCheck for debris and remove if necessary. 31
Fire extinguisherCheck the condition and replace if necessary. 29
Engine shut-off cordCheck the condition and replace if frayed or broken. 32
SwitchesCheck the start switch, engine stop switch, and en-
gine shut-off switch for proper operation.32
AFTER LAUNCH
Cooling water pilot outletCheck that water is discharged while the engine is
running and the watercraft is in the water.32
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Operation
29
draining water or use a dry cloth to soak up
any water that could spill into the watercraft. If
any water spills into the watercraft, be sure to
wipe it up with a dry cloth. Also, be sure to in-
stall the drain screw after draining the water
separator.
EJU32430Bilge
Check the bilge for moisture and fuel residue.
CAUTION:
ECJ00340
Excessive water in the bilge can splash
into the carburetor and engine, which can
result in severe damage.
EJU32481Battery
Check the battery electrolyte level and check
that the battery has sufficient power to start
the engine easily. Recharge the battery or re-
place it if it is not in good condition. (See page
60 for battery recharging procedures.)
Also, check that the battery leads are tight-
ened securely and that there is no corrosion
on the battery terminals. Check that the
breather hose is securely connected to the
battery and that it is not pinched.
WARNING
EWJ00450

The battery must always be fully
charged and in good condition. Loss of
battery power may leave you stranded.
Never operate the watercraft if the bat-
tery does not have sufficient power to
start the engine or if it shows any other
signs of decreased power.

Be sure to connect the breather hose to
the battery. Fire or explosion could re-
sult if the breather hose is damaged, ob-
structed, or not connected properly.
Make sure that the battery is securely held in
place.
EJU32500Fire extinguisher
Check that there is a full fire extinguisher on
board.
The fire extinguisher container is located on
the hood under the steering pole.
1Positive (+) battery terminal: Red lead
2Negative (–) battery terminal: Black lead
3Breather hose
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Operation
30
To open the fire extinguisher container:
(1) Grasp the tab, pull the band to the rear,
and then pull it up.
(2) Lift the container about 30 degrees from
the storage position.
CAUTION:
ECJ00400
Do not force the fire extinguisher contain-
er up more than 30 degrees from the stor-
age position, otherwise the container and
hood could be damaged.
(3) Remove the cap to access the fire extin-
guisher.
To close the fire extinguisher container:
(1) Insert the fire extinguisher into the con-
tainer, and then install the cap and tighten
it securely.(2) Lower the container on the hood to its
storage position and secure it with the
band.
NOTE:

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 extin-
guisher dealer to obtain one meeting the
proper specifications.
EJU32590Throttle lever
Check the throttle lever for proper operation.
Squeeze and release the throttle lever several
times to make sure that there is no hesitation
in its travel. It should be smooth over the com-
plete range and spring back to the idle posi-
tion when released.
WARNING
EWJ00490
Before starting the engine, always check
the operation of the throttle lever.
EJU32600Steering system
Check the handlebars for looseness.
Turn the handlebars as far as possible to the
right and left to make sure that operation is
1Fire extinguisher holder and cover
2Ta b
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Operation
43

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.
EJU33300Beaching the watercraft
(1) Make sure that there are no boats, swim-
mers, or obstacles near the beach. Re-
lease the throttle lever about 90 m (300 ft)
before you reach the intended beaching
area.
(2) Approach the beach slowly and stop the
engine before reaching land.
Remember, you need throttle to steer.
(3) Get off the watercraft and pull it up on the
beach.
CAUTION:
ECJ00490
Small pebbles, sand, seaweed, and other
debris can be sucked into the jet intake
and impair or damage the impeller. Always
stop the engine and get off the watercraft
before beaching it.
EJU33330Rough water operation
The force of landing after jumping can cause
a strong impact on both the watercraft and the
operator. It is possible for the operator to hit
his or her chest or jaw on the watercraft or
handlebars and be injured.
Do not operate the watercraft with your chin
right above the handlebars or with your feet
outside the watercraft.
Operating in rough water or jumping waves
can also crack the watercraft hull and damage
internal parts. Avoid operating in rough water
or bad weather conditions.
EJU33361
Post-operation care
To keep your watercraft in top shape, always
take it out of the water after using it and per-
form the following procedures. Leaving the
watercraft in the water for extended periods
will accelerate the rate of normal deterioration
of the jet unit components and hull finish. Ma-
rine organisms and corrosion are some of the
conditions that can adversely affect the life of
many watercraft components.
(1) Remove the watercraft from the water.
(2) Wash down the hull, steering pole, han-
dlebars, and jet unit with fresh water.
(3) Remove the hood and check the engine
compartment for water. To drain excess
water, turn the watercraft on its port (left)
side. If necessary, turn the watercraft up-
side down to drain the water completely.
CAUTION:
ECJ00580

Place a suitable clean cloth or carpeting
underneath the watercraft to protect it
from abrasions and scratches.

Always turn the watercraft over onto its
port (left) side.

When turning the watercraft onto its
side or inverting it, support the bow and
secure the steering pole, otherwise the
steering pole and handlebars could be
bent or damaged.
NOTE:
This watercraft is equipped with an automatic
bilge draining system that removes water
from the engine compartment while you are
underway. However, some residual water will
remain.
(4) Place the watercraft in a horizontal posi-
tion.
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