2008 YAMAHA SUPERJET tow

Table of contents
Checking the jet thrust
nozzle angle ................................. 53
Adjusting the steering friction .......... 54
Adjusting the jet thrust
nozzle angle ................................. 55
Checking and
adjusting the throttle cable ........... 56
Cleaning and
adjusting the spark plugs ............. 57
Lubrication points ............................ 58
Adjusting the choke cable ............... 59
Checking the battery ....................... 60
Adjusting the carburetor .................. 61
Specifications .................................. 62
Specifications ................................ 62
Trouble recovery ............................. 63
Troubleshooting ........................... 63
Troubleshooting chart ...................... 63
Emergency procedures ................ 65
Cleaning the jet intake and
impeller ........................................ 65
Jumping the battery ......................... 66
Replacing the fuse ........................... 67
Towing the watercraft ...................... 67
Submerged watercraft ..................... 68
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Safety information
11
so that the engine stops if you, the operator,
fall off. After riding, remove the engine shut-
off cord from the watercraft to avoid acci-
dental starting or unauthorized use by chil-
dren or others.

Scan carefully for swimmers, and stay
away from swimming areas. Swimmers are
hard to see and you could accidentally hit
someone in the water.

Avoid being hit by another boat! You should
always take the responsibility to watch for
traffic; other boaters may not be watching
for you. If they do not see you, or if you ma-
neuver more quickly than other boaters ex-
pect, you risk a collision.

Maintain a safe distance from other boats
and watercraft, and also watch for ski ropes
or fishing lines. Obey the “Safe boating
rules” and be sure to check behind you be-
fore making a turn. (See “Safe boating
rules” on page 13.)
EJU30840
Recommended equipment
The following items should be carried on
board your watercraft:

Sound-signaling device
You should carry a whistle or other sound-
signaling device that can be used to signal
other boats.

Visual distress signals
It is recommended that a pyrotechnic de-
vice, which is approved by the appropriate
authorities, be stored in a waterproof con-
tainer on your watercraft. A mirror can also
be used as an emergency signal. Contact a
Yamaha dealer for more information.

Watch
A watch is helpful so you will know how long
you have been operating the watercraft.

Towline
A towline can be used to tow a disabled wa-
tercraft in an emergency.
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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.
EJU31660Engine 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, shut the engine off, and then
1Steering pole
2Lock pin
1Bow rope hole
1Stern rope hole
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Operation
40
(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.
NOTE:

The watercraft will become easier to bal-
ance as the speed increases, because jet
thrust provides stability as well as direction-
al control.

It will take longer for a heavier operator to
reach planing speed than it will for a light
operator.
EJU33200Capsized watercraft
If the watercraft capsizes, turn it over immedi-
ately.
Be sure to carefully follow the procedures be-
low to prevent injury, or damage to the water-
craft.
WARNING
EWJ00670
IMPROPER UPRIGHTING CAN CAUSE IN-
JURY:

Be sure to shut the engine off by pulling
on the engine shut-off cord to remove
the clip from the engine shut-off switch.

Do not put your hands in the intake
grate.
CAUTION:
ECJ00510
Be sure to remove the clip from the engine
shut-off switch to shut the engine off, oth-
erwise the engine can overheat, which can
result in severe damage.
(1) Remove the clip from the engine shut-off
switch.(2) Swim to the rear of the watercraft and up-
right it by turning it clockwise only.
NOTE:
If the port (left) side of the capsized watercraft
is tilting up, push down on the gunwale so that
the port (left) side is down before turning the
watercraft clockwise.
CAUTION:
ECJ00520
Do not turn the watercraft over counter-
clockwise, otherwise water can enter the
carburetor and engine, which can result in
severe damage.
(3) Start the engine and operate the water-
craft to discharge any water remaining in
the engine compartment. (If the engine
does not start, see “Towing the water-
craft” on page 67 or “Submerged water-
craft” on page 68.)
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Operation
45
gunwale. Use a rubber shock cord to secure
the steering pole.
CAUTION:
ECJ00630

Do not route ropes or tie downs over the
steering pole, as they could damage it.
Also, wrap the ropes or tie downs with
towels or rags where they touch the
body of the watercraft to avoid scratch-
ing or damage.

Do not transport the watercraft with the
steering pole up, otherwise the steering
pole could be damaged.
1Rubber shock cord
2Tie down
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Trouble recovery
67
gine. Any wrong connection could dam-
age the electrical system.
(4) Start the engine, and then disconnect the
jumper cables by reversing the steps
above.
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.
EJU34670Replacing 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
EWJ00800
Do not use fuses of higher amperage than
recommended. Substitution with a fuse
that has an improper rating can cause ex-
tensive electrical system damage and pos-
sible fire.
EJU34701Towing the watercraft
If the watercraft becomes inoperative in the
water, it can be towed to shore.
If the watercraft must be towed in an emer-
gency using a towline, the operator should
ride the watercraft, holding onto the handle-
bars and supporting his or her body weight on
the riding tray. This will help keep the bow of
the watercraft out of the water.
WARNING
EWJ00810

The watercraft should only be towed in
an emergency.

The towline should be long enough so
that the watercraft will not collide with
the towing boat when slowing down. A
good rule of thumb is a towline that is
three times the combined length of the
towing boat and the watercraft.

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 rider on the watercraft.
CAUTION:
ECJ00710

Tow the watercraft at 5 mph (8 km/h) or
less, otherwise water could enter the en-
gine through the exhaust passages or
through the air intake and flood the en-
gine compartment if it is towed too fast.
1Electrical box
2Fuse holder
3Cap
4Fuse
Fuse amperage:
10 A
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Trouble recovery
68

Tow the watercraft using the bow rope
hole only.

The bow must be kept up out of the wa-
ter during towing to prevent water from
entering the engine compartment.
EJU34730Submerged 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!
In an emergency:
(1) Beach the watercraft and remove the
hood. Turn the watercraft over far enough
to drain the water from the engine com-
partment.
CAUTION:
ECJ00700
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.
(2) Turn the watercraft upright again.
(3) Turn the fuel cock knob to “OFF”.
(4) Remove the spark plugs and dry them
with a cloth.(5) Without reinstalling the spark plugs,
crank the engine until all of the water in
the cylinders has been drained.
(6) Install the spark plugs and the hood.
(7) Turn the fuel cock knob to “ON”.
(8) Launch the watercraft into the water, and
then run the engine for at least 10 min-
utes. If the engine does not start, repeat
steps 3–8.
(9) Shut the engine off.
(10) Turn the fuel cock knob to “OFF”, remove
the silencer cap, and then spray a rust in-
hibitor into the carburetor while cranking
the engine.
(11) Have the watercraft inspected by a
Yamaha dealer as soon as possible.
1Bow rope hole
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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
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