engine YAMAHA VX 2005 Owner's Guide

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EJU10480
Pre-operation check points
EJU21210
Engine compartment
Ventilate the engine compar tment before
each use.
To ventilate the engine compartment,
remove the seat. (See page 2-5 for seat
removal and installation procedures.) Leave
the engine compartment open for a few min-
utes to allow any fuel vapors to escape.
While the engine compartment is open,
check for loose electrical connections.
WARNING@ Failure to ventilate the engine compart-
ment could result in fire or explosion. Do
not start the engine if there is a fuel leak
or a loose electrical connection.
@
EJU20570
Hull and deck
Check the hull and deck for cracks or
other damage. If any damage is found, have
a Yamaha dealer repair the watercraft.
EJU21220
Fuel level
Check the fuel system for leakage,
cracks, or malfunctions before each use.
(See page 4-10 for check points and correct
procedures.)
1. Remove the fuel tank filler cap to release
any pressure that might have built up in
the fuel tank.
2. Remove the seat. (See page 2-5 for seat
removal and installation procedures.)
3. Check the fuel level in the tank and
replenish if necessary. (See page 3-4 for
filling instructions.)
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EJU21230
Engine oil level
Check the engine oil level before each
use.
CAUTION:@
When checking the engine oil level on
water, be careful of other watercraft,
boats, swimmers, and obstacles. The
water current and wind can cause the
watercraft to move and lead to a colli-
sion.

When checking the engine oil level on
land, supply water to the cooling water
passages. (See page 4-1 for proce-
dures on supplying water.)

Make sure that the engine has enough
oil but do not overfill it. If there is too
little oil, the engine can be damaged. If
there is too much oil, the air filter can
become saturated with oil, perma-
nently damaging the filter and reduc-
ing engine performance. Follow the
checking procedure carefully.

Make sure that debris and water do not
enter the oil tank filler hole. Debris and
water in the engine oil can cause seri-
ous engine damage.
@
To check the engine oil level:
1. Place the watercraft in a horizontal posi-
tion or launch the watercraft, and then
start the engine.
2. Run the engine at trolling speed for
6 minutes or more, and then stop the
engine.
NOTE:@ If the ambient temperature is 20 °C (68°F)
or less, warm up the engine for an additional
5 minutes.
@
3. Remove the seat. (See page 2-5 for seat
removal and installation procedures.)
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4. Remove the oil tank filler cap 1, wipe
the dipstick clean, and then screw the
filler cap into the filler hole completely.
Remove the filler cap again and check
that the oil level is between the minimum
level mark 3 and maximum level
mark2 on the dipstick.
5. If the oil level is below the minimum level
mark, add enough oil so that the oil level
is between the minimum and maximum
level marks on the dipstick, and then
install the filler cap. If the engine oil level
is significantly above the maximum level
mark, the oil tank is overfilled. Have a
Yamaha dealer remove the excessive
amount of engine oil.
EJU19610
Water separator
Check the water separator 1 for water.
Normally the water separator is empty. The
water separator retains any water entering
through the fuel tank breather hose if the
watercraft is capsized.
If water remains in the water separator,
drain it by removing the drain screw 2.
Place a drain pan under the water separator
to catch the draining water or use a dry cloth
to soak up any water that could spill into the
watercraft. If any water spills into the water-
craft, be sure to wipe it up with a dry cloth.
Be sure to install the drain screw after drain-
ing the water separator.
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EJU21490
Bilge
Check for moisture and fuel residue in the
bilge.
Excessive water in the bilge can splash
into the engine which could cause engine
damage.
To remove water from the bilge:
1. Remove the stern drain plugs.
2. Raise the bow of the watercraft until the
water drains.
3. After the water has drained, wipe the
bilge with dry rags to make sure that the
bilge is thoroughly dry.
4. Install the drain plugs.
EJU20581
Stern drain plug
Check the stern drain plugs for proper
installation.
CAUTION:@
Make sure that the stern drain plugs
are tightened securely before launch-
ing the watercraft. Otherwise, water
may flood the engine compartment
and cause the watercraft to submerge.

Clean any foreign materials, such as
dirt or sand, from the drain plug
threads before installing the drain
plugs. Otherwise, the drain plugs may
be damaged and water may enter the
engine compartment.
@
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EJU19690
Battery
Check the battery condition and the elec-
trolyte level.
Check that the battery leads are tightened
securely and there is no corrosion on the
battery terminals.
WARNING@
The battery must always be fully
charged and in good condition. Loss
of battery power may leave you
stranded. Never operate the watercraft
if the battery does not have sufficient
power to start the engine or if it shows
any other signs of decreased power.

Be sure to connect the breather hose
to the battery. Fire or explosion could
result if the breather hose is damaged,
obstructed, or not connected properly.
@
Make sure that the battery is securely
held in place.
1
Positive (+): Red lead
2
Negative (–): Black lead
3
Breather hose
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EJU21240
Fire extinguisher
Check that there is a full fire extinguisher
on board. The fire extinguisher holder and
cover 1 are located in the front storage
compartment.
To store the fire extinguisher, unhook the
band 2 and remove the cover. Place the fire
extinguisher in the holder, and then place
the cover over the fire extinguisher. Fasten
the cover and the fire extinguisher with the
band securely.
NOTE:@
See the instructions supplied by the fire
extinguisher manufacturer for checking
the fire extinguisher. Always keep the
extinguisher secured in the holder with its
cover in place.

Always carry a fire extinguisher on board.
A fire extinguisher is not standard equip-
ment with this watercraft. If you do not
have one, contact a Yamaha dealer or a
fire extinguisher dealer to obtain one
meeting the proper specifications.
@
EJU18340
Throttle
Squeeze and release the throttle lever
several times to make sure that there is no
hesitation in its travel. It should be smooth
over the complete range, and spring back to
the idle position when released.
WARNING@ Before starting the engine, always check
the operation of the throttle lever.
@
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EJU10570
Steering system
Check for looseness in the handlebars.
Turn them as far as possible to the right
and left to make sure that operation is
smooth and unrestricted throughout the
whole range. Make sure that the jet thrust
nozzle also changes directions as the han-
dlebars are turned, and that there is no free
play between the handlebars and the jet
thrust nozzle.
EJU12451
Shift lever and reverse gate
(for VX110 Deluxe)
Check for proper operation of the shift
lever and reverse gate.
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@
Make sure that the throttle 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.
@
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EJU10580
Jet unit
Carefully check the jet intake for weeds,
debris, or anything else that might restrict
the intake of water. If the intake is clogged,
cavitation could occur, reducing jet thrust,
and possibly damaging the jet pump.
In some cases, the engine may overheat
because of lack of cooling water, and dam-
age to the engine could result. Engine cool-
ing water is fed to the engine by the jet
pump. (See page 5-3 for jet intake cleaning
procedures.)
WARNING@
Keep away from intake grate while
engine is on. Items such as long hair,
loose clothing, or PFD straps can
become entangled in moving parts
resulting 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
may have collected around the jet
intake.
@
EJU10590
Engine shut-off cord (lanyard)
Check that the engine shut-off cord is not
frayed or broken. If the cord is damaged,
replace it; never try to repair it or tie it
together.
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EJU18352
Switches
CAUTION:@ Do not run the engine of the watercraft
for more than 15 seconds on land with-
out supplying water, otherwise the
engine may overheat.
@
Check the start switch, the engine stop
switch, and the engine shut-off switch for
proper operation.
Push the start switch 1 to start the
engine. As soon as the engine starts run-
ning, push the engine stop switch 2 to ver-
ify that the engine stops immediately.
Restart the engine, and then pull the engine
shut-off cord 5 to remove the clip 4 from
the engine shut-off switch 3 to verify that
the engine stops immediately. (See pages
2-9 to 2-10 for information on proper opera-
tion of the start switch, the engine stop
switch, and the engine shut-off switch.)
EJU13201
Cooling water pilot outlet
Check that water comes out from the pilot
outlet while the engine is running and the
watercraft is in the water. (See page 2-11 for
more information.)
EJU12460
Multifunction meter
Check the operation of the multifunction
meter. (See pages 2-15 to 2-23 for operation
of the meter.)
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EJU18360
Operation
WARNING@ Before operating your watercraft,
become familiar with all controls. Con-
sult your Yamaha dealer about any con-
trol or function you do not fully
understand. Failure to understand how
controls work could cause an accident or
prevent you from avoiding an accident.
@
CAUTION:@ Make sure that the stern drain plugs are
securely tightened before launching the
watercraft.
@
EJU18072
Engine break-in
The engine break-in period is essential to
allow the various components of the engine
to wear and polish themselves to the correct
operating clearances. This ensures proper
performance and promotes longer compo-
nent life.
CAUTION:@ Be sure to check the engine oil level
before operating the watercraft for the
first time. (See page 3-7 for engine oil
checking procedures.)
@
1. Launch the watercraft and start the
engine. (See page 3-17 for engine start-
ing procedures.)
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