Page 33 of 120
2-8
E
EJU18610
Start switch
Push the start switch 1 (green button) to
start the engine.
NOTE:@ The engine will not start when the clip is
removed from the engine shut-off switch or if
the throttle lever is squeezed.
@
EJU10201
Cooling water pilot outlet
This watercraft is equipped with cooling
water pilot outlets.
When the engine is running, cooling
water is circulated in the engine, and then it
is discharged from the pilot outlets.
To check for proper operation of the cool-
ing system, check that water is being dis-
charged from the pilot outlets. If water is not
being discharged from the outlets, cooling
water may not be circulating in the engine.
When this occurs, stop the engine and
check for the cause. (See pages 2-12 and
5-4 for further instructions.)
NOTE:@ If the cooling water passages are dry, it will
take about 20 seconds for the water to reach
the outlet after the engine is started.
@
UF1G70.book Page 8 Wednesday, December 18, 2002 3:35 PM
Page 34 of 120
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EJU19950
Steering system
Your watercraft can be steered by turning
the handlebars 1 in the direction you wish
to travel.
When the handlebars are turned, the
angle of the jet thrust nozzle 2 is changed
and the direction of the watercraft is
changed accordingly. Since the strength of
the jet thrust determines the speed and
degree of a turn, throttle must always be
applied when attempting a turn, except at
trolling speed.
This model has the Yamaha Engine Man-
agement System (YEMS) that includes an
Off-Throttle Steering (OTS) system. It will
activate at planing speeds should you
attempt to steer the watercraft after releas-
ing the throttle lever. The OTS system
assists in turning by continuing to supply
some thrust while the watercraft is deceler-
ating, but you can turn more sharply if you
apply throttle while turning the handlebars.
The OTS system does not function below
planing speeds or when the engine is off.
Once the engine slows down, the watercraft
will no longer turn in response to handlebar
input until you apply throttle again or you
reach trolling speed.
UF1G70.book Page 9 Wednesday, December 18, 2002 3:35 PM
Page 35 of 120
2-10
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EJU10220
Quick Shift Trim System
(QSTS) selector
The QSTS selector 1 is located at the
left handlebar grip and is used to adjust the
trim angle of the watercraft.
Operating the QSTS selector changes the
angle of the jet thrust nozzle vertically. This
changes the trim angle of the watercraft.
There are 5 positions: 2 bow down posi-
tions A and B, neutral “N,” and 2 bow up
positions C and D.
To change the trim angle:
1. Reduce engine speed to 3,000 r/min or
less.
2. Squeeze the shift lock lever 2, and then
turn the QSTS selector to the desired
position.
3. Release the shift lock lever to lock the
QSTS selector.
CAUTION:@ Do not turn the QSTS selector while
operating the watercraft at full throttle,
otherwise damage could occur to the
QSTS.
@
The neutral “N” position will provide good
performance for most operating conditions.
To enhance particular types of perfor-
mance, select bow down or bow up.
UF1G70.book Page 10 Wednesday, December 18, 2002 3:35 PM
Page 36 of 120
2-11
E
EJU10230
Bow down
Turn the grip to A or B and the bow will
go down while the watercraft is on plane.
Bow down puts more of the bow in the
water. This gives the watercraft more “hook,”
which enhances turning performance. This
position will also help the watercraft get up
on plane more quickly.
At higher speeds, however, the watercraft
will have greater tendency to “bow steer”
and follow waves and wakes in the water.
Fuel economy and maximum speed are also
reduced.
EJU10240
Bow up
Turn the grip to C or D and the bow will
go up while the watercraft is on plane.
Bow up puts less of the bow in the water.
There is less water resistance, so straight-
ahead acceleration when on plane and top
speed are enhanced.
In some conditions, however, the water-
craft may tend to “porpoise” (hop in the
water). If the watercraft is porpoising,
choose neutral or bow down.
EJU19790
Handgrip
The handgrip 1 provides a handhold for
boarding the watercraft.
WARNING@ Do not use the handgrip to lift the water-
craft. The watercraft could fall, which
could result in severe injury.
@
UF1G70.book Page 11 Wednesday, December 18, 2002 3:35 PM
Page 37 of 120
2-12
E
EJU20450
Engine overheat warning
system
This model is equipped with an engine
overheat warning system.
If the engine starts to overheat, the warn-
ing light and the engine overheat warning
indicator begin to blink, and the buzzer
sounds intermittently.
When this occurs, reduce the engine
speed and beach the watercraft. Check for
water discharge. If there is no discharge of
water at the cooling water pilot outlet, whole
the engine is running, check the intake grate
and impeller for clogging.
WARNING@ Before attempting to remove weeds or
debris 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:@ This watercraft is equipped with a cata-
lytic converter.
Return to shore at low speed if over-
heat warning indicator and buzzer
come on. If you ignore these signals,
engine will stop running and cannot be
restarted until exhaust system cools
down.
Have your watercraft inspected and
serviced by a Yamaha dealer if engine
stops due to overheating.
@
UF1G70.book Page 12 Wednesday, December 18, 2002 3:35 PM
Page 38 of 120
2-13
E
If the overheat warning is ignored, engine
and exhaust system heat may increase, par-
ticularly if the watercraft is operated at
higher speeds. When this occurs, the warn-
ing light, the engine overheat warning indi-
cator and the buzzer will change from
intermittently to continuously on, and the
overheat system will stop ignition to the
engine to reduce the risk of severe over-
heating. The engine cannot be started until
it cools down, so it may be necessary to
have the watercraft towed back to the
beach. (See “Towing the watercraft” on page
5-7 for towing procedures.)
NOTE:@ Press the select button on the multifunction
information center to stop the buzzer.
@
EJU20460
Exhaust temperature warning
system
This model is equipped with an exhaust
temperature warning system.
If the exhaust temperature gets too hot,
the warning light and exhaust temperature
warning indicator begin to blink, and the
buzzer sounds intermittently.
When this occurs, reduce engine speed
and beach the watercraft to allow the
exhaust system to cool down.
WARNING@ Hot muffler surfaces can cause serious
burns. Do not touch any muffler surface
during or after engine operation. The cat-
alytic converter gets hotter after the
engine stops.
@
UF1G70.book Page 13 Wednesday, December 18, 2002 3:35 PM
Page 39 of 120
2-14
E
CAUTION:@ This model is equipped with a catalytic
converter.
When the exhaust temperature warn-
ing system is activated, reduce engine
speed (below 4,000 r/min) and beach
the watercraft.
If you cannot locate and correct the
cause of the overheating, consult a
Yamaha dealer. Continuing to operate
at higher speeds could result in severe
engine damage.
@
NOTE:@ Press the select button on the multifunction
information center to stop the buzzer.
@
EJU19940
Yamaha Engine Management
System (YEMS)
This model is equipped with an inte-
grated, computerized management system
that controls and adjusts ignition timing, fuel
injection, engine diagnostics, and the Off-
Throttle Steering (OTS) system.
UF1G70.book Page 14 Wednesday, December 18, 2002 3:35 PM
Page 40 of 120
2-15
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EJU20161
Multifunction information
center
This meter contains following functions for
the help and convenience of operation.
1
Tachometer
2
Speedometer
3
Hour meter/Voltmeter
4
Fuel meter
5
Warning light
6
Fuel warning indicator
7
Engine overheat warning indicator
8
Oil warning indicator
9
Exhaust temperature warning indicator
0
Check engine warning indicator
A
Select button
CAUTION:@ Do not run the engine over 4,000 r/min
to check the meter for operation on
land. The engine could overheat or the
catalytic converter could result in seri-
ous damage.
Use the specified resistor-type spark
plug and cap, otherwise the meter may
function erratically.
@
NOTE:@ All display light up and the buzzer sounds
twice after the engine starts. Then, the
meter will operate normally after few sec-
onds. The current display will continue to
operate for 25 seconds after the engine
stops.
@
UF1G70.book Page 15 Wednesday, December 18, 2002 3:35 PM
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