2008 YAMAHA SUPERJET stop start

Operation
35
(4) Pull the choke knob all the way out to
start a cold engine.
NOTE:
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), and
then release the switch as soon as the
engine starts to run.
WARNING
EWJ00590
On this watercraft, the engine is connect-
ed directly to the jet pump. Starting the en-
gine generates some thrust immediately.
Apply only enough throttle to keep the en-
gine running.
CAUTION:
ECJ00480

Never push the start switch while the en-
gine is running.

Do not operate the start switch for more
than 5 seconds, otherwise the battery
will be discharged and the engine will
not start. Also, the starter motor could
be damaged. If the engine does not start
in 5 seconds, release the start switch,
wait 15 seconds, and then try again.
(6) After the engine has warmed up, push
the choke knob in to its original position.
NOTE:
If the choke knob is left pulled out, the engine
will stall.
EJU32860Stopping the engine
To stop the engine, release the throttle lever,
and then push the engine stop switch (red
button).
WARNING
EWJ00600
You need throttle to steer. Shutting the en-
gine off can cause you to hit an obstacle
you are attempting to avoid. A collision
could result in severe injury or death.
EJU32870Leaving the watercraft
If leaving the watercraft, remove the engine
shut-off cord to reduce the chance of acciden-
tal starting or unauthorized use by children or
others.
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Maintenance and care
46
EJU33480
Storage
WARNING
EWJ00320
Always turn the fuel cock knob to “OFF”
when storing the watercraft, otherwise
fuel could leak out into the engine or en-
gine compartment, which would create a
fire hazard.
Storage for long periods of time, such as win-
ter storage, requires preventive maintenance
to ensure against deterioration. It is advisable
to have the watercraft serviced by a Yamaha
dealer prior to storage. However, the following
procedures can be performed by the owner.
EJU33512Flushing the cooling system
Flushing the cooling system is essential to
prevent it from clogging with salt, sand, or dirt.
CAUTION:
ECJ00920

Do not supply water to the cooling water
passages when the engine is not run-
ning. The water could flow back through
the muffler into the crankcase, causing
severe engine damage.

Do not run the engine for more than 15
seconds on land without supplying wa-
ter, otherwise the engine could over-
heat.
(1) Place the watercraft in a horizontal posi-
tion.
(2) Remove the flushing hose connector
cap, and then insert the garden hose
adapter into the flushing hose connector
and turn it until it is securely connected.
(3) Connect the garden hose adapter to a
water tap using a garden hose.
NOTE:
A garden hose is not included and must be
purchased separately.
(4) Start the engine, and then immediately
turn the water supply on until water flows
out continually from the cooling water pi-
lot outlet.
(5) 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 repeat
the above steps.
(6) Turn the water supply off, and then force
the remaining water out of the cooling
water passages by alternately squeezing
and releasing the throttle lever for 10 to
15 seconds.
(7) Stop the engine.
1Garden hose adapter
2Flushing hose connector
3Flushing hose connector cap
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Maintenance and care
47
(8) Remove the garden hose adapter and in-
stall the flushing hose connector cap.
EJU33561Lubrication
WARNING
EWJ00300
To reduce the risk of fire or explosion:
Never pour or spray gasoline, or any sub-
stance other than a rust inhibitor through
the hole in the carburetor silencer cover.
CAUTION:
ECJ00151

Be sure to install the silencer cap se-
curely after fogging the engine, other-
wise water could enter the engine and
cause damage.

Do not run the engine for more than 15
seconds without supplying water, other-
wise the engine could overheat.
(1) Remove the silencer cap.
(2) Start the engine with the watercraft in a
well-ventilated area.
(3) With the engine running at a fast idle,
quickly spray as much rust inhibitor as
possible through the hole in the silencer
cover. Keep spraying until the engine
stalls (or a maximum of 15 seconds).
(4) Install the silencer cap securely.
(5) Lubricate all cables such as the throttle,
choke, and steering cables.
NOTE:
Use a suitable marine grease applicator to
pressure-lubricate the cables and purge out
any moisture between the inner and outer ca-
bles.
(6) Lubricate the areas of the watercraft
specified in “Lubrication points” on page
58.
EJU33640Fuel system
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-
1Silencer cap
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Maintenance and care
61
(3) Secure the battery in place.
WARNING
EWJ00400
Be sure to connect the breather hose to
the battery. Fire or explosion could result
if the breather hose is damaged, obstruct-
ed, or not connected properly.
CAUTION:
ECJ00260
After installation, make sure that the bat-
tery leads are properly connected to the
battery terminals.
EJU34460Adjusting the carburetor
The carburetor is a vital part of the engine and
requires very sophisticated adjustments.
Most adjustments should be left to a Yamaha
dealer who has the professional knowledge
and experience to make them. However, the
operator may adjust the trolling speed as part
of the usual maintenance routine.
CAUTION:
ECJ00170
The carburetor was set at the Yamaha fac-
tory after many tests. If the settings are
disturbed by someone who does not have
the necessary technical knowledge, poorengine performance and damage may re-
sult.
EJU34470Adjusting the trolling speed
(1) Place the watercraft in the water.
(2) Start the engine and warm it up for 1 to 2
minutes.
(3) While using a diagnostic tachometer, turn
the throttle stop screw to adjust the en-
gine speed to specification. Turn the
throttle stop screw clockwise to increase
the engine speed or counterclockwise to
decrease the engine speed.
1Positive (+) battery terminal: Red lead
2Negative (–) battery terminal: Black lead
3Breather hose
1Throttle stop screw
Trolling speed:
1300 ±50 r/min
UF2F70E0.book Page 61 Tuesday, April 17, 2007 9:56 AM

Index
2-stroke engine oil .................................... 25
B
Battery ................................................ 29, 48
Battery, checking...................................... 60
Battery, jumping ....................................... 66
Beaching the watercraft ........................... 43
Bilge ......................................................... 29
Boarding and starting in deep water ........ 39
Boarding and starting in shallow water .... 38
Bow rope hole .......................................... 22
C
Capsized watercraft ................................. 40
Carburetor, adjusting................................ 61
Choke cable, adjusting ............................. 59
Choke knob .............................................. 20
Cleaning the watercraft ............................ 48
Cooling water pilot outlet .................... 20, 32
Craft Identification Number (CIN) ............... 1
Cruising limitations ..................................... 8
E
Emergency procedures ............................ 65
Engine break-in ........................................ 33
Engine compartment ................................ 28
Engine overheat warning system ............. 22
Engine serial number ................................. 1
Engine shut-off cord ................................. 32
Engine shut-off switch .............................. 19
Engine stop switch ................................... 19
Enjoy your watercraft responsibly ............ 14
F
Filling the fuel tank ................................... 26
Fire extinguisher....................................... 29
Flushing the cooling system ..................... 46
Fuel and oil............................................... 25
Fuel cock knob ......................................... 18
Fuel filter .................................................. 53
Fuel system ........................................ 28, 47
Fuel system, checking.............................. 53
Fuel tank .................................................. 53
Fuel tank filler cap .................................... 18
Fuse, replacing......................................... 67
G
Gasohol .................................................... 25
Gasoline ................................................... 25Getting to know your watercraft ............... 36
H
Hazard information ................................... 12
Hood ......................................................... 17
Hull and deck ........................................... 28
I
Identification numbers ................................ 1
Important labels .......................................... 2
J
Jet intake .................................................. 31
Jet intake and impeller, cleaning .............. 65
Jet thrust nozzle angle, adjusting ............. 55
Jet thrust nozzle angle, checking ............. 53
Jumper cables, connecting ...................... 66
K
Kneeling ................................................... 37
L
Labels, other .............................................. 6
Labels, warning .......................................... 3
Launching the watercraft .......................... 33
Learning to operate your watercraft ......... 36
Leaving the watercraft .............................. 35
Limitations on who may operate
the watercraft .......................................... 7
Lubrication................................................ 47
Lubrication points ..................................... 58
M
Main components, location of .................. 15
Maintenance and adjustments ................. 49
Mixing fuel and oil .................................... 25
O
Operating positions .................................. 37
Operating your watercraft ......................... 36
Operation ................................................. 33
Operation of controls and
other functions ...................................... 17
Operation requirements ............................. 9
Owner’s/operator’s manual and tool kit .... 49
P
Periodic maintenance chart ...................... 51
Post-operation care .................................. 43
Pre-operation check list ............................ 27
Pre-operation check points ...................... 28
Pre-operation checks ............................... 27
Primary Identification (PRI-ID) number ...... 1
UF2F70E0.book Page 1 Tuesday, April 17, 2007 9:56 AM

Index
R
Recommended equipment ....................... 11
Rough water operation ............................. 43
S
Safe boating rules .................................... 13
Spark plugs, cleaning and adjusting ........ 57
Standing ................................................... 37
Start switch............................................... 20
Starting the engine ................................... 33
Starting the watercraft .............................. 38
Steering friction, adjusting ........................ 54
Steering pole ...................................... 22, 31
Steering system ................................. 21, 30
Stern rope hole......................................... 22
Stopping the engine ................................. 35
Stopping the watercraft ............................ 42
Storage..................................................... 46
Storage pouch .......................................... 23
Submerged watercraft .............................. 68
Switches ................................................... 32
T
Throttle cable, checking and adjusting ..... 56
Throttle lever ...................................... 20, 30
Towing the watercraft ............................... 67
Transporting ............................................. 44
Trolling speed, adjusting .......................... 61
Troubleshooting ....................................... 63
Troubleshooting chart .............................. 63
Turning the watercraft .............................. 41
W
Water separator ....................................... 28
Watercraft characteristics......................... 12
UF2F70E0.book Page 2 Tuesday, April 17, 2007 9:56 AM