2007 YAMAHA VX CRUISER engine overheat

Features and functions
34
EJU31451Multifunction information center
This meter contains the following functions for
help and convenience in operating the water-
craft.
CAUTION:
ECJ00071
Do not run the engine for more than 15
seconds without supplying water or over
4000 r/min on land when checking the op-
eration of the meter, otherwise the engine
could overheat.
NOTE:

When the engine is started, all displays light
up for 2 seconds, and then the meter starts
to operate normally.

The current display will continue to operate
for 25 seconds after the engine stops.
EJU31460Tachometer
The engine speed (r/min) is displayed by seg-
ments. Each segment indicates a 250 r/min
increment.
EJU31500Speedometer
The meter shows the watercraft speed
against water.
NOTE:
To switch the speedometer display between
kilometers and miles, push the select button
for at least 1 second, within 10 seconds after
the meter is displayed.
EJU31510Fuel level meter
The fuel level meter is provided for convenient
fuel level checking while riding.
1Tachometer
2Speedometer
3Hour meter/voltmeter
4Fuel level meter
5“L-MODE” indicator light (for VX Deluxe/VX
Cruiser)
6“WARNING” light
7Fuel level warning indicator
8Oil pressure warning indicator
9Engine overheat warning indicator
10Check engine warning indicator
11Select button
12“SECURITY” indicator light (for VX Deluxe/
VX Cruiser)
1Select button
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Features and functions
36
sure warning indicator begin to blink, and the
buzzer sounds intermittently. At the same
time, the engine speed is limited to help pre-
vent damage.
If this occurs, reduce the engine speed, return
to shore, and then check the engine oil level.
(See page 45 for engine oil level checking
procedures.) If the oil level is low, add enough
engine oil to raise it to the proper level. If the
oil level is sufficient, have a Yamaha dealer
check the watercraft.
NOTE:
Press the select button on the multifunction
meter to stop the buzzer.
EJU31602Engine overheat warning indicator
This model is equipped with an engine over-
heat warning system.
If the engine starts to overheat, the “WARN-
ING” light and the engine overheat warning in-dicator blink, and then come on. The buzzer
also begins to sound intermittently, and then it
sounds continuously. After the light and indi-
cator start to blink and the buzzer sounds, the
engine speed is limited to help prevent dam-
age.
If this occurs, immediately reduce the engine
speed, return to shore, and then check for wa-
ter discharge at the port (left) cooling water pi-
lot outlet while the engine is running. If there
is no discharge of water, shut the engine off,
and then check the intake grate and impeller
for clogging.
WARNING
EWJ00050
Before attempting to remove weeds or de-
bris from the intake grate or impeller, shut
the engine off and remove the clip from the
engine shut-off switch. Severe injury or1Select button
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Features and functions
37
death could result from coming in contact
with the rotating parts of the jet pump.
CAUTION:
ECJ00040
If you cannot locate and correct the cause
of the overheating, consult a Yamaha deal-
er. Continuing to operate at higher speeds
could result in severe engine damage.
NOTE:
Press the select button on the multifunction
meter to stop the buzzer.
EJU31630Check engine warning indicator
If a sensor malfunction or a short circuit is de-
tected, the “WARNING” light and the check
engine warning indicator begin to blink, and
the buzzer sounds intermittently.
If this occurs, reduce the engine speed, return
to shore, and have a Yamaha dealer check
the engine.
EJU35001“SECURITY” indicator light (for VX De-
luxe/VX Cruiser)
The “SECURITY” indicator light comes on
when the unlock mode of the Yamaha Securi-
ty System is selected. The watercraft can be
1Select button
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Operation
49
turned, and that there is no free play between
the handlebars and the jet thrust nozzle.
EJU32630Shift lever and reverse gate (for VX Deluxe/
VX Cruiser)
Check the shift lever and reverse gate for
proper operation.
Make sure that the reverse gate goes down
completely when the shift lever is pulled up.
Also, make sure that the reverse gate goes up
completely when the shift lever is pushed
down.
WARNING
EWJ00480

Make sure that the throttle lever is com-
pletely released and that the engine is at
idle before shifting into reverse.

Do not use the reverse function to slow
down or stop the watercraft as it could
cause you to lose control, be ejected, or
impact the handlebars.

Use reverse for slow-speed maneuver-
ing only.

Make sure that there are no obstacles or
people behind you before shifting into
reverse.

Do not touch the reverse gate while the
shift lever is being operated, otherwise
you could be pinched.
EJU32650Jet 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,
cavitation could occur, reducing jet thrust, and
possibly damaging the jet pump.
In some cases, the engine may overheat be-
cause of lack of cooling water, and damage to
the engine could result. Cooling water is fed to
the engine by the jet pump. (See page 82 for
jet intake cleaning procedures.)
WARNING
EWJ00470

Keep away from the intake grate while
the engine is on. Items such as long hair,
loose clothing, or PFD straps can be-
come entangled in moving parts, result-
ing in severe injury or drowning.

Stop the engine and remove the clip
from the engine shut-off switch before
removing any debris or weeds, which
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Operation
50
may have collected around the jet in-
take.
EJU32660Engine shut-off cord
Check that the engine shut-off cord is not
frayed or broken. If the cord is damaged, re-
place it; never try to repair it or tie it together.
EJU32670Switches
CAUTION:
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.
Check the start switch, the engine stop
switch, and the engine shut-off switch for
proper operation.
Push the start switch to start the engine. As
soon as the engine starts running, push the
engine stop switch to verify that the engine
stops immediately. Restart the engine, and
then pull the engine shut-off cord to remove
the clip from the engine shut-off switch to ver-
ify that the engine stops immediately. (See
pages 28 to 29 for information on proper op-
eration of the start switch, the engine stop
switch, and the engine shut-off switch.)
EJU32680Cooling water pilot outlet
Check that water comes out from the cooling
water pilot outlet while the engine is running
1Start switch
2Engine stop switch
3Engine shut-off switch
4Clip
5Engine shut-off cord
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Operation
52
(1) Launch the watercraft and start the en-
gine. (See page 52 for engine starting
procedures.)
(2) For the first 5 minutes, run the engine at
trolling speed only. For the 30 minutes of
operation after that, keep the engine
speed below 5000 r/min. For the 1 hour of
operation after that, keep the engine
speed below 6500 r/min.
(3) Proceed with normal operation.
CAUTION:
ECJ00430
Failure to follow the engine break-in pro-
cedure could result in reduced engine life
or even severe engine damage.
EJU32811Launching the watercraft
When launching the watercraft, make sure
that there are no obstacles around you.
If there are waves, someone should make
sure that the watercraft is not pushed into the
trailer after launching the watercraft.

For VX Deluxe/VX Cruiser:
Use the remote control transmitter to select
the unlock mode. (See page 32 for Yamaha
Security System and low-RPM mode selec-
tion procedures.)
After the watercraft is in the water, start the
engine. Shift into reverse and move the wa-
tercraft back slowly.

For VX:
After the watercraft is in the water, turn it
around so that the bow faces the direction
you wish to go. Start the engine, and then
slowly move away from the launching area.
EJU32850Starting the engine
WARNING
EWJ00560
Never start the engine or let it run for any
length of time in an enclosed area. Ex-
haust fumes contain carbon monoxide, acolorless, odorless gas that may cause
loss of consciousness and death within a
short time. Always operate the watercraft
in an open area.
(1) If the lock mode of the Yamaha Security
System is selected (for VX Deluxe/VX
Cruiser), use the remote control transmit-
ter to select the unlock mode. (See page
32 for Yamaha Security System and low-
RPM mode selection procedures.)
(2) Launch the watercraft in water free from
weeds and debris and at least 60 cm (2 ft)
deep.
WARNING
EWJ00570
Never operate in water that is less than 60
cm (2 ft) deep, otherwise you increase
your chance of hitting a submerged ob-
ject, which could result in injury.
CAUTION:
ECJ00470
Never operate in water that is less than 60
cm (2 ft) deep, otherwise pebbles or sand
could be sucked into the jet intake, caus-
ing impeller damage and engine overheat-
ing.
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Operation
56
footwell. Never allow a passenger to ride in
front of the operator.
WARNING
EWJ00550
When passengers are on board, make
sure that they are holding on firmly and
have their feet on the floor of the footwell
before you start to accelerate.
When pulling a water-skier, the spotter should
face to the rear while holding the handgrip
with both hands. The spotter should always sit
astride the seat with both feet placed firmly on
the floor of the footwell for proper balance.
Follow all local laws regarding water-skiing,
such as those for skier-down flags, rearward-
facing spotter, and other requirements.
EJU33080Starting the watercraft
WARNING
EWJ00710

Scan constantly for people, objects, and
other watercraft. Be alert for conditions
that limit your visibility or block your vi-
sion of others.

Operate defensively at safe speeds and
keep a safe distance away from people,
objects, and other watercraft.

Do not follow directly behind watercraft
or other boats. Do not go near others to
spray or splash them with water. Avoid
sharp turns or other maneuvers that
make it hard for others to avoid you or
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.

Practice reboarding in shallow water be-
fore riding in deep water.
EJU33090Boarding and starting in shallow water
(1) Launch the watercraft in water free from
weeds and debris and at least 60 cm (2 ft)
deep.
WARNING
EWJ00640
Never operate in water that is less than 60
cm (2 ft) deep, otherwise you increase
your chance of hitting a submerged ob-
ject, which could result in injury.
CAUTION:
ECJ00500
Never operate in water that is less than 60
cm (2 ft) deep, otherwise pebbles or sand
could be sucked into the jet intake, caus-
ing impeller damage and engine overheat-
ing.
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Maintenance and care
66
EJU33490
Storage
WARNING
EWJ00330
Always place the watercraft upright in a
horizontal position when storing it, other-
wise fuel could leak out into the engine or
engine compartment, which could 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.
EJU33541Flushing the cooling system
Flushing the cooling system is essential to
prevent it from clogging with salt, sand, or dirt.
CAUTION:
ECJ00121

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 without supplying water or
over 4000 r/min on land, otherwise the
engine could overheat.
(1) Remove the watercraft from the water
and place it in a horizontal position.
(2) Remove the seat. (See page 26 for seat
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.
NOTE:
A garden hose is not included and must be
purchased separately.
(5) Start the engine, and then immediately
turn the water supply on until water flows
out continually from the jet thrust nozzle.
(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.
(7) Turn the water supply off, and then force
the remaining water out of the cooling
1Flushing hose connector cap
2Garden hose adapter
3Flushing hose connector
UF1K72E0.book Page 66 Wednesday, August 2, 2006 10:43 AM