engine overheat YAMAHA SUPERJET 2009 Owners Manual

Table of contents
General and important labels ........... 1
Identification numbers .................... 1
Primary Identification (PRI-ID)
number ........................................... 1
Craft Identification Number (CIN) ...... 1
Engine serial number ........................ 1
Important labels .............................. 2
Warning labels ................................... 3
Other labels ....................................... 6
Safety information ............................. 7
Limitations on who may operate
the watercraft .............................. 7
Cruising limitations ......................... 8
Operation requirements ................. 9
Recommended equipment ........... 11
Hazard information ....................... 12
Watercraft characteristics ............. 12
Safe boating rules ........................ 13
Enjoy your watercraft
responsibly ................................ 14
Features and functions ................... 15
Location of main components ...... 15
Operation of controls and other
functions .................................... 17
Hood ................................................ 17
Fuel tank filler cap ........................... 18
Fuel cock knob ................................ 18
Engine stop switch .......................... 19
Engine shut-off switch ..................... 19
Start switch ...................................... 20
Choke knob ..................................... 20
Throttle lever ................................... 20
Cooling water pilot outlet ................. 20
Steering system ............................... 21
Steering pole ................................... 22
Bow rope hole ................................. 22
Stern rope hole ................................ 22
Engine overheat warning system .... 22
Storage pouch ................................. 23
Operation ......................................... 24
Fuel and oil .................................. 24
Fuel ................................................. 24
2-stroke engine oil ........................... 24
Mixing fuel and oil ............................ 24
Filling the fuel tank .......................... 25
Pre-operation checks ................... 26
Pre-operation check list ................... 26
Pre-operation check points .............. 27
Operation ..................................... 32
Engine break-in ............................... 32
Launching the watercraft ................. 32
Starting the engine .......................... 32
Stopping the engine ........................ 34
Leaving the watercraft ..................... 34
Operating your watercraft ............ 35
Getting to know your watercraft ....... 35
Learning to operate your
watercraft ..................................... 35
Operating positions ......................... 36
Starting the watercraft ..................... 36
Boarding and starting in deep
water ............................................ 38
Capsized watercraft ......................... 39
Turning the watercraft ..................... 40
Stopping the watercraft ................... 41
Beaching the watercraft ................... 42
Operating in weeded areas ............. 42
Post-operation care ...................... 42
Transporting ................................. 43
Maintenance and care .................... 45
Storage ........................................ 45
Flushing the cooling system ............ 45
Lubrication ....................................... 46
Battery ............................................. 46
Cleaning the watercraft ................... 47
Maintenance and adjustments ..... 47
Owner’s/operator’s manual and
tool kit ........................................... 47
Periodic maintenance chart ............. 49
Checking the fuel system ................ 51
Checking the jet thrust nozzle
angle ............................................ 51
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Features and functions
22
EJU31270Steering pole
The steering pole varies in height with the op-
erator’s posture, enabling the operator to as-
sume various riding positions.
When removing the hood for pre-operation
checks, maintenance, etc., lift the steering
pole and use the lock pin to support it. Move
the lock pin into the detent. Make sure that the
lock pin is returned to the stowed position af-
ter installing the hood.
EJU36000Bow rope hole
The bow rope hole is located at the bow of the
watercraft.The bow rope hole is used to attach a rope to
the watercraft when transporting, mooring, or
towing it in an emergency.
EJU36010Stern rope hole
The stern rope hole is located at the stern of
the watercraft.
The stern rope hole is used to attach a rope to
the watercraft when mooring it.
EJU31661Engine overheat warning system
This model is equipped with an engine over-
heat warning system.
If the engine starts to overheat, the engine
speed will be limited to about 3400 r/min.
If this occurs, immediately reduce the engine
speed, return to shore, and then check for wa-
ter discharge at the cooling water pilot outlet
while the engine is running. If there is no dis-
charge of water, check the intake grate and
1Steering pole
2Lock pin
1Bow rope hole
1Stern rope hole
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Features and functions
23
impeller. (See page 63 for checking proce-
dures.) NOTICE: If you cannot locate and
correct the cause of the overheating, con-
sult a Yamaha dealer. Continuing to oper-
ate at higher speeds could result in severe
engine damage.
[ECJ00041]
EJU31672
Storage 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.The storage pouch is not waterproof. If you
carry objects that must be kept dry, such as
the manual, put them in a waterproof bag.
1Storage pouch
1Band
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Operation
30
turned, and that there is no free play between
the handlebars and the jet thrust nozzle.
EJU32620Steering pole
Check the steering pole for looseness.
Move the steering pole up and down to make
sure that operation is smooth and unrestricted
throughout the whole range. Also, make sure
that the steering pole does not have any side
play.
EJU32651Jet intake
Carefully check the jet intake for weeds, de-
bris, or anything else that might restrict the in-
take of water. If the jet intake is clogged, clean
it. (See page 63 for jet intake cleaning proce-
dures.)
If the watercraft is operated while the jet in-
take is clogged, cavitation could occur, reduc-
ing jet thrust, and possibly damaging the jet
pump. In some cases, the engine may over-
heat because of lack of cooling water, anddamage to the engine could result. Cooling
water is fed to the engine by the jet pump.
EJU32661Engine shut-off cord (lanyard)
Check that the engine shut-off cord (lanyard)
is not frayed or broken. If the cord is dam-
aged, replace it. WARNING! Never try to re-
pair the engine shut-off cord (lanyard) or
tie it together. The engine shut-off cord
(lanyard) may not pull free when the oper-
ator falls off, allowing the watercraft to
continue to run and cause an accident.
[EWJ01220]
EJU32671
Switches
NOTICE
ECJ00410
Do not run the engine for more than 15
seconds when checking the switches on
land without supplying water, otherwise
the engine could overheat.
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Operation
33
the jet intake, causing impeller dam-
age and engine overheating.
[ECJ00471]
(3) Turn the fuel cock knob to “ON”.
(4) Attach the engine shut-off cord (lanyard)
to your left wrist, and then attach the clip
to the engine shut-off switch. It is not pos-
sible to start the engine with the clip re-
moved from the engine shut-off switch.
WARNING! Check that the engine
shut-off cord (lanyard) is attached cor-
rectly. If the engine shut-off cord (lan-
yard) is not attached correctly, it may
not pull free when the operator fallsoff, allowing the watercraft to continue
to run and cause an accident.
[EWJ00581]
(5) 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.
(6) 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. If the engine does
not start in 5 seconds, release the start
switch, wait 15 seconds, and then try
again. WARNING! Do not apply too
much throttle when starting the en-
gine, otherwise the watercraft will ac-
celerate unexpectedly. This could
cause a collision or cause the opera-
1Clip
2Engine shut-off switch
3Engine shut-off cord (lanyard)
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Operation
37
understand where you are going. Avoid
areas with submerged objects or shal-
low 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.
The watercraft is less stable when at a stand-
still or at a slow speed. It takes skill to keep the
watercraft upright when starting.
Even though it is easier to start in shallow wa-
ter, you must learn deep-water boarding first.
You will inevitably fall off, so be sure you know
how to get back on the watercraft once you
are away from shore.
EJU33102Boarding and starting in shallow water
Be sure to learn the deep-water starting meth-
od before operating the watercraft in water
where it is too deep for you to stand. (See
page 38 for the deep-water starting method.)
(1) Launch the watercraft in water free from
weeds and debris and at least 60 cm (2 ft)
deep from the bottom of the watercraft.
NOTICE: Never operate 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.
[ECJ00471]
(2) Attach the engine shut-off cord (lanyard)
to your left wrist, and then attach the clip
to the engine shut-off switch.
(3) Grip the handlebars with both hands.
Place one knee on the riding tray and bal-
ance there.
(4) Start the engine and begin to accelerate.
(5) Pull your other knee up onto the riding
tray as the watercraft speed increases.
(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.
TIP:
The watercraft will become easier to balance
as the speed increases, because jet thrust
provides stability as well as directional control.
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Maintenance and care
45
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.
EJU33513Flushing the cooling system
Flushing the cooling system is essential to
prevent it from clogging with salt, sand, or dirt.
(1) Place the watercraft in a horizontal posi-
tion.
(2) Remove the hood. (See page 17 for hood
removal and installation procedures.)
(3) Remove the flushing hose connector
cap, and then insert the garden hoseadapter into the flushing hose connector
and turn it until it is securely connected.
(4) Connect the garden hose adapter to a
water tap using a garden hose.
TIP:
A garden hose is not included.
(5) Start the engine, and then immediately
turn the water supply on until water flows
out continually from the cooling water pi-
lot outlet. NOTICE: Do not run the en-
gine for more than 15 seconds without
supplying water, otherwise the engine
could overheat.
[ECJ01010]
TIP:
If you will be storing the watercraft for a pro-
longed period, such as winter storage, top off
the fuel tank with fresh gasoline and add fuel
stabilizer and conditioner to the fuel tank ac-
cording to the manufacturer’s instruction be-
fore starting the engine.
(6) 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. NOTICE: Do not sup-
ply water to the cooling water passag-
es when the engine is not running. The
water could flow back through the
1Garden hose adapter
2Flushing hose connector
3Flushing hose connector cap
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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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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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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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