warning YAMAHA SUPERJET 2009 Owner's Manual

Maintenance and care
46
muffler into the engine, causing se-
vere engine damage.
[ECJ00122]
(7) 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.
(8) Stop the engine.
(9) Remove the garden hose adapter and in-
stall the flushing hose connector cap.
(10) Install the hood.
EJU33562Lubrication
(1) Remove the hood. (See page 17 for hood
removal and installation procedures.)
(2) Remove the silencer cap.
(3) Start the engine with the watercraft in a
well-ventilated area. NOTICE: Do not
run the engine for more than 15 sec-
onds without supplying water, other-
wise the engine could overheat.
[ECJ00562]
(4) 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).
WARNING! Do not pour or spray gas-
oline, or any substance other than a
rust inhibitor through the hole in the
silencer cover. Do not spray flamma-
ble rust inhibitor products on enginesurfaces while the engine is hot. Oth-
erwise, a fire or explosion could oc-
cur.
[EWJ00301]
(5) Install the silencer cap securely.
NOTICE: Be sure to install the silencer
cap securely after fogging the engine,
otherwise water could enter the en-
gine and cause damage.
[ECJ00152]
(6) Lubricate all cables such as the throttle,
choke, and steering cables. Use a suit-
able marine grease applicator to pres-
sure-lubricate the cables and purge out
any moisture between the inner and outer
cables.
(7) Lubricate the areas of the watercraft
specified in “Lubrication points” on page
56.
(8) Install the hood.
EJU33681Battery
If the watercraft will not be used for more than
a month, remove the battery from the water-
craft and store it in a cool, dry place.
(1) Disconnect the negative (–) battery lead
first, then the positive (+) battery lead and
breather hose, and then remove the bat-
tery from the watercraft.
(2) Clean the battery casing using fresh wa-
ter.
(3) If the battery terminals are dirty or corrod-
ed, clean them with a wire brush.
(4) Fully charge the battery.
(5) Apply Yamaha Marine Grease or
Yamaha Grease A to the battery termi-
nals, and then store the battery in a cool,
dry place.
(6) Check the battery at least once every 2
months and fully charge it if necessary.
NOTICE: Always keep the battery
charged. Storing a discharged battery
can cause permanent battery damage.
[ECJ00101]
1Silencer cap
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Maintenance and care
47
To check the condition of the battery, check
the specific gravity of the electrolyte or mea-
sure the voltage at both battery terminals.
Charge the battery if the voltage is less than
12 volts.
It is recommended to have a Yamaha dealer
check the specific gravity and charge the bat-
tery. If you maintain the battery yourself, be
sure to read and follow the instructions provid-
ed with the battery tester and charger you
use.
EJU33701Cleaning the watercraft
Clean the watercraft before storing it for a long
period.
(1) Wash down the hull, handlebars, and jet
unit with fresh water.
(2) Rinse the engine and engine compart-
ment with fresh water. Drain all of the wa-
ter and wipe up any remaining moisture
with clean, dry rags. NOTICE: Do not
use high-pressure water when rinsing
the engine and engine compartment
as severe engine damage could result.
[ECJ00111]
(3) Spray the engine’s exterior with a rust in-
hibitor and lubricant.
(4) Wax the hull with a non-abrasive wax.
(5) Wipe all vinyl and rubber components,
such as the engine compartment seals,
with a vinyl protectant. Do not use vinyl
protectant on the riding tray, because it
will make it slippery.
EJU33762
Maintenance and adjustments
Periodic inspection, adjustment, and lubrica-
tion will keep your watercraft in the safest and
most efficient condition possible. Safety is an
obligation of the watercraft owner. Proper
maintenance must be carried out to keep the
exhaust emission and sound levels within the
regulated limits. The most important points of
watercraft inspection, adjustment, and lubri-
cation are explained on the following pages.
See a Yamaha dealer for genuine Yamaha re-
placement parts and optional accessories de-
signed for your watercraft.
Remember, failures that are the result of the
installation of parts or accessories which are
not qualitatively equivalent to genuine
Yamaha parts are not covered by the limited
warranty.
Maintenance, replacement, or repair of the
emission control devices and system may
be performed by any marine SI engine re-
pair establishment or individual. Warranty
repair, however, must be performed at an
authorized Yamaha marine dealership.
WARNING
EWJ00311
Be sure to turn off the engine when you
perform maintenance unless otherwise
specified. If you are not familiar with ma-
chine servicing, this work should be done
by a Yamaha dealer or other qualified me-
chanic.
EJU33781Owner’s/operator’s manual and tool
kit
It is advisable to always carry the owner’s/op-
erator’s manual and tool kit with you whenev-
er you use the watercraft. For your Specific gravity (for reference):
1.28 at 20 °C (68 °F)
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Maintenance and care
51
EJU34202Checking the fuel system
WARNING
EWJ00381
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.
Check the fuel system for leaks, cracks, and
malfunctions. If any problem is found, consult
a Yamaha dealer.
Check:

Carburetor for leakage

Fuel tank filler cap and seal for damage

Fuel in fuel tank for water and dirt

Fuel tank for damage, cracks, and leakage

Fuel hoses and joints for damage, cracks,
and leakage

Fuel filter for leakage

Fuel cock for leakage

Air vent check valve for leakageEJU34221Fuel filter
Check the fuel filter. If water or dirt is found in
the fuel filter, have a Yamaha dealer replace
it.
EJU34230Fuel tank
Check the fuel tank for leakage and for water
in the tank. If water is found in the fuel system,
or if the fuel tank needs to be cleaned, have a
Yamaha dealer service the watercraft.
EJU34321Checking the jet thrust nozzle angle
Check the handlebars and jet thrust nozzle for
smooth operation.
Turn the handlebars as far as possible to the
right and left and check that the difference of
distances A and B between the jet thrust noz-
zle and the nozzle is within specification.
1Fuel filter
1Fuel tank
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Maintenance and care
55
(4) Hold the adjuster with one wrench while
tightening the locknut with another
wrench.
(5) Install the handlebar cover and the four
screws.
EJU34374Cleaning and adjusting the spark
plugs
WARNING
EWJ00350
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.
The spark plug is an important engine compo-
nent and is easy to inspect. The condition of
the spark plug can indicate something about
the condition of the engine. For example, if the
center electrode porcelain is very white, this
could indicate an intake air leak or carburetion
problem in that cylinder. Do not attempt to di-
agnose any problems yourself. Have a
Yamaha dealer service the watercraft.
Remove and inspect the spark plugs periodi-
cally; heat and deposits will cause the spark
plugs to slowly break down and erode. If elec-
trode erosion becomes excessive, or if carbon
and other deposits are excessive, replace the
spark plug with the specified plug.
To remove a spark plug:
(1) Remove the hood. (See page 17 for hood
removal and installation procedures.)
(2) Remove the spark plug cap.(3) Remove the spark plug.
Measure the spark plug gap with a wire
thickness gauge. Replace the spark
plugs or adjust the gap to specification if
necessary.
To install a spark plug:
(1) Clean the gasket surface.
(2) Wipe any dirt from the threads of the
spark plug.
(3) Install the spark plug, and then tighten it
to the specified torque.
(4) Wipe off any water on the spark plug or
inside the spark plug cap, and then install
the cap. Push the spark plug cap down
until it is securely installed.
TIP:
If a torque wrench is not available when you
are installing a spark plug, a good estimate of
the correct torque is 1/4 turn to 1/2 turn past
finger tight using the spark plug wrench in-
cluded in the tool kit. Have the spark plug ad-
justed to the correct torque with a torque
wrench as soon as possible.
(5) Install the hood. Throttle lever free play:
7.0–10.0 mm (0.28–0.39 in)
Specified spark plug:
BR7HS
1Spark plug gap
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Spark plug tightening torque:
25.0 Nm (2.55 kgf-m, 18.4 ft-lb)
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Maintenance and care
57
nents. Have a Yamaha dealer lubricate the
handlebar pivot shaft.

Intermediate housing
Fill the intermediate housing with water-re-
sistant grease through the grease nipple
using a grease gun.
EJU34440Adjusting the choke cable
Check that the choke cable is properly adjust-
ed.
(1) Pull the choke knob out until it stops, and
then release the knob. The knob should
not move.(2) If the choke knob moves back on its own,
tighten the choke knob adjusting nut
slightly. If the knob is difficult to move,
loosen the adjusting nut slightly.
EJU34452Checking the battery
Check the level of the battery electrolyte and
make sure that the negative (–) and positive
(+) battery leads are tightened securely.
WARNING
EWJ00791
Battery electrolyte is poisonous and dan-
gerous, causing severe burns, etc. Elec-
trolyte contains sulfuric acid. Avoid
contact with skin, eyes, or clothing.
Antidotes
External: Flush with water.
Internal: Drink large quantities of water or
milk. Follow with milk of magnesia, beaten
egg, or vegetable oil. Call a physician im-
mediately.
Eyes: Flush with water for 15 minutes and
get prompt medical attention.
Batteries produce explosive gases. Keep
sparks, flames, cigarettes, etc., well away.
If using or charging the battery in an en-
closed space, make sure that it is well ven-
tilated. Always shield your eyes when
working near batteries.
Keep out of the reach of children.
Grease quantity:
Initial 10 hours or 1 month:
20.0–22.0 cm³ (0.68–0.74 US oz,
0.71–0.78 Imp.oz)
Every 100 hours or 12 months:
3.0–5.0 cm³ (0.10–0.17 US oz,
0.11–0.18 Imp.oz)
1Choke knob adjusting nut
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Maintenance and care
58
To remove the battery:
Disconnect the negative (–) battery lead first,
then the positive (+) battery lead and breather
hose, and then remove the battery from the
watercraft.
To replenish the battery:
(1) Make sure that the electrolyte level is be-
tween the maximum and minimum level
marks.
(2) If the electrolyte level is low, add distilled
water to raise it to the specified level.
NOTICE: Use only distilled water for
replenishing the battery, otherwise
battery life could be shortened.
[ECJ00241]
To recharge the battery:
NOTICE
ECJ00250
Do not attempt to charge a battery hastily.
Battery life could be shortened.
It is recommended to have a Yamaha dealer
charge the battery. If you charge the battery
yourself, be sure to read and follow the in-
structions provided with the battery tester and
charger you use.
To install the battery:
(1) Place the battery in the battery compart-
ment. Connect the red lead to the positive
(+) battery terminal, and then connect the
black lead to the negative (–) battery ter-minal. NOTICE: Reversal of the battery
leads will damage the electrical parts.
[ECJ00261]
(2) Connect the breather hose to the battery.
(3) Secure the battery in place. WARNING!
Fire or explosion could result if the
breather hose is damaged, obstruct-
ed, or not connected properly.
[EWJ00451]
EJU34462
Adjusting the carburetor
NOTICE
ECJ00172
If the carburetor settings are disturbed by
someone who does not have the neces-
sary technical knowledge, poor engine
performance and damage may result.
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 rou-
tine.
EJU34470Adjusting the trolling speed
(1) Place the watercraft in the water.
(2) Start the engine and warm it up for 1 to 2
minutes.
1Maximum level mark
2Minimum level mark
1Positive (+) battery terminal: Red lead
2Negative (–) battery terminal: Black lead
3Breather hose
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Trouble recovery
63
EJU34620
Emergency procedures EJU34631Cleaning the jet intake and impeller
WARNING
EWJ00780
Before attempting to remove weeds or de-
bris from the jet intake or impeller area,
shut the engine off and remove the clip
from the engine shut-off switch. Severe in-
jury or death could result from coming in
contact with the rotating parts of the jet
pump.
If weeds or debris gets caught in the jet intake
or impeller, cavitation can occur, causing jet
thrust to decrease even though engine speed
rises. If this condition is allowed to continue,
the engine will overheat and may seize.
NOTICE: If weeds or debris gets caught in
the jet intake, do not operate the watercraft
above trolling speed until they have been
removed.
[ECJ00651]
If there is any sign that the jet intake or impel-
ler is clogged with weeds or debris, return to
shore and check the intake and impeller. Al-ways stop the engine before beaching the wa-
tercraft.
(1) Place a suitable clean cloth or carpeting
underneath the watercraft to protect it
from abrasions and scratches. Turn the
watercraft on its side as shown. NOTICE:
Always turn the watercraft over onto
its port (left) side. When turning the
watercraft on its side, support the bow
so that the handlebars are not bent or
damaged.
[ECJ00661]
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Trouble recovery
64
(2) Remove any weeds or debris from
around the jet intake, drive shaft, impel-
ler, jet pump housing, and jet thrust noz-
zle.
If debris is difficult to remove, consult a
Yamaha dealer.
EJU34641Jumping the battery
If the watercraft battery has run down, the en-
gine can be started using a 12-volt booster
battery and jumper cables.
EJU34652Connecting the jumper cables
WARNING
EWJ01250
To avoid battery explosion and serious
damage to the electrical system:

Do not reverse the polarity of the jumper
cables when connecting to the batteries.

Do not connect the negative (–) jumper
cable to the negative (–) terminal of the
watercraft battery.

Do not touch the positive (+) jumper ca-
ble to the negative (–) jumper cable.
(1) Connect the positive (+) jumper cable to
the positive (+) battery terminals of both
batteries.
(2) Connect one end of the negative (–)
jumper cable to the negative (–) battery
terminal of the booster battery.(3) Connect the other end of the negative (–)
jumper cable to an unpainted bolt on the
cylinder head.
(4) Start the engine, and then disconnect the
jumper cables by reversing the steps
above. NOTICE: Never push the start
switch while the engine 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.
[ECJ00481]
EJU34671
Replacing the fuse
The fuse is located in the electrical box.
To replace the fuse:
(1) Remove the cap, and then pull out the
red lead to pull out the fuse holder from
the electrical box.
(2) Open the fuse holder and replace the
fuse with one of the correct amperage.
WARNING! Do not use fuses of higher
amperage than recommended. Substi-
tution with a fuse that has an improper
rating can cause extensive electrical
1Positive (+) jumper cable
2Booster battery
3Negative (–) jumper cable
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Trouble recovery
65
system damage and possible fire.
[EWJ00801]
EJU34702
Towing the watercraft
WARNING
EWJ00811

The operator of the towing boat must
keep speed to a minimum and avoid traf-
fic or obstacles which could be a hazard
to the operator on the watercraft.

The towline should be long enough so
that the watercraft will not collide with
the towing boat when slowing down.
If the watercraft becomes inoperative in the
water, it can be towed to shore.
When the watercraft is towed using a towline,
the operator should ride the watercraft, hold-
ing onto the handlebars and supporting his or
her body weight on the riding tray. This will
help keep the bow of the watercraft out of the
water.
Use a towline that is three times the combined
length of the towing boat and the watercraft.Tow the watercraft using the bow rope hole
only.
Tow the watercraft at 5 mph (8 km/h) or less.
The bow must be kept up out of the water dur-
ing towing to prevent water from entering the
engine compartment.
EJU34731Submerged watercraft
If the watercraft is submerged or flooded with
water, follow the procedure below and consult
a Yamaha dealer as soon as possible. Failure
to do so could result in serious engine dam-
age.
(1) Beach the watercraft and remove the
hood.
(2) Turn the fuel cock knob to “OFF”.
(3) Turn the watercraft over far enough to
drain the water from the engine compart-
ment. NOTICE: Turning the watercraft
on its side with the hood removed
could cause damage to the steering
pole. Use two people to provide
enough support to make sure that the
steering pole is not damaged.
[ECJ00701]
(4) Turn the watercraft upright again.
(5) Have the watercraft inspected by a
Yamaha dealer as soon as possible.
NOTICE: Be sure to have a Yamaha
dealer inspect the watercraft. Other-
wise, serious engine damage could re-
sult.
[ECJ00791]
1Electrical box
2Fuse holder
3Cap
4Fuse
Fuse amperage:
Battery fuse:
10 A
1Bow rope hole
UF2F71E0.book Page 65 Thursday, April 10, 2008 11:47 AM

Index
2-stroke engine oil .................................... 24
B
Battery ................................................ 28, 46
Battery, checking...................................... 57
Battery, jumping ....................................... 64
Beaching the watercraft ........................... 42
Bilge ......................................................... 28
Boarding and starting in deep water ........ 38
Boarding and starting in shallow water .... 37
Bow rope hole .......................................... 22
C
Capsized watercraft ................................. 39
Carburetor, adjusting................................ 58
Choke cable, adjusting ............................. 57
Choke knob .............................................. 20
Cleaning the watercraft ............................ 47
Cooling water pilot outlet .................... 20, 31
Craft Identification Number (CIN) ............... 1
Cruising limitations ..................................... 8
E
Emergency procedures ............................ 63
Engine break-in ........................................ 32
Engine compartment ................................ 27
Engine overheat warning system ............. 22
Engine serial number ................................. 1
Engine shut-off cord (lanyard) .................. 30
Engine shut-off switch .............................. 19
Engine stop switch ................................... 19
Enjoy your watercraft responsibly ............ 14
F
Fire extinguisher....................................... 28
Flushing the cooling system ..................... 45
Fuel and oil............................................... 24
Fuel cock knob ......................................... 18
Fuel filter .................................................. 51
Fuel system .............................................. 27
Fuel system, checking.............................. 51
Fuel tank .................................................. 51
Fuel tank filler cap .................................... 18
Fuel tank, filling ........................................ 25
Fuse, replacing......................................... 64
G
Gasohol .................................................... 24
Gasoline ................................................... 24Getting to know your watercraft ............... 35
H
Hazard information ................................... 12
Hood ......................................................... 17
Hull and deck ........................................... 27
I
Identification numbers ................................ 1
J
Jet intake .................................................. 30
Jet intake and impeller, cleaning .............. 63
Jet thrust nozzle angle, adjusting ............. 53
Jet thrust nozzle angle, checking ............. 51
Jumper cables, connecting ...................... 64
K
Kneeling ................................................... 36
L
Labels, important ........................................ 2
Labels, other .............................................. 6
Labels, warning .......................................... 3
Launching the watercraft .......................... 32
Learning to operate your watercraft ......... 35
Leaving the watercraft .............................. 34
Limitations on who may operate the
watercraft ................................................ 7
Lubrication................................................ 46
Lubrication points ..................................... 56
M
Main components, location of .................. 15
Maintenance and adjustments ................. 47
Mixing fuel and oil .................................... 24
O
Operating in weeded areas ...................... 42
Operating positions .................................. 36
Operating your watercraft ......................... 35
Operation ................................................. 32
Operation of controls and other
functions ............................................... 17
Operation requirements ............................. 9
Owner’s/operator’s manual and tool kit .... 47
P
Periodic maintenance chart ...................... 49
Post-operation care .................................. 42
Pre-operation check list ............................ 26
Pre-operation check points ...................... 27
Pre-operation checks ............................... 26
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