check oil YAMAHA VX110 2005 Service Manual

1-4
E
GEN
INFO
SAFETY WHILE WORKING
3.Non-reusable parts
Always use new gaskets, seals, O-rings,
oil seals, cotter pins, circlips, etc., when
installing or assembling parts.
DISASSEMBLY AND ASSEMBLY
1. Use compressed air to remove dust and
dirt during disassembly.
2. Apply engine oil to the contact surfaces of
moving parts during assembly.
3. Install bearings with the manufacture iden-
tification mark in the direction indication in
the installation procedure. In addition, be
sure to lubricate the bearings liberally.
4. Apply a thin coat of water-resistant grease
to the lip and periphery of an oil seal
before installation.
5. Check that moving parts operate normally
after assembly.
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3
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5
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7
8
9
CHAPTER 3
PERIODIC INSPECTION AND ADJUSTMENT
MAINTENANCE INTERVAL CHART .............................................................. 3-1
PERIODIC SERVICE ....................................................................................... 3-2
CONTROL SYSTEM ................................................................................. 3-2
Steering column inspection ................................................................. 3-2
Steering cable inspection and adjustment .......................................... 3-2
Throttle cable inspection and adjustment............................................ 3-4
Shift cable inspection and adjustment (Deluxe model only)................ 3-5
Trolling speed inspection .................................................................... 3-6
FUEL SYSTEM.......................................................................................... 3-7
Fuel line inspection ............................................................................. 3-7
Water separator inspection ................................................................. 3-8
POWER UNIT............................................................................................ 3-8
Valve clearance adjustment ................................................................ 3-8
Engine oil level check........................................................................ 3-14
Engine oil change — using oil changer ............................................. 3-16
Air filter element clean....................................................................... 3-18
Spark plug inspection ........................................................................ 3-20
ELECTRICAL .......................................................................................... 3-22
Battery inspection.............................................................................. 3-22
JET PUMP UNIT ..................................................................................... 3-25
Impeller inspection ............................................................................ 3-25
Water inlet strainer inspection ........................................................... 3-25
BILGE PUMP........................................................................................... 3-26
Bilge strainer inspection .................................................................... 3-26
GENERAL ............................................................................................... 3-26
Drain plug inspection......................................................................... 3-26
Lubrication points .............................................................................. 3-26
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3-14
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POWER UNIT
8. Remove:
Dial gauge
Dial gauge stand
Dial gauge needle
9. Install:
All removed parts
NOTE:
For installation, reverse the removal proce-
dure.
Engine oil level check
1. Check:
Engine oil level
Checking steps:
CAUTION:
When checking the engine oil level on
water, be careful of other watercraft,
boats, swimmers, or obstacles. The
water current or 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.
Make sure that engine has enough oil
but do not overfill. 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 or water does
not enter the oil tank filler hole. Debris
or water in the engine oil can cause
serious engine damage.
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3-15
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POWER UNIT
Place the watercraft in a horizontal posi-
tion or launch the watercraft.
Remove the seat.
Remove the oil tank filler cap 1
and
check for oil on the dipstick 2
.
If there is no oil on the dipstick, pour
enough oil so that the tip of the dipstick
comes into contact with the oil, and then
install the filler cap.
Start the engine.
CAUTION:
When starting the engine make sure the
dipstick is securely fitted into the oil
tank.
NOTE:
The engine cannot be started if the
Yamaha Security System is in the lock
mode. (Deluxe model only)
For information on the Yamaha Security
System, see the owner’s manual. (Deluxe
model only)
Run the engine at trolling speed for 6
minutes or more, and then turn the
engine off.
CAUTION:
When checking the oil level on land, be
sure to connect a garden hose to the
watercraft for proper water supply.
NOTE:
If the ambient temperature is 20°C (68°F)
or less, warm up the engine for an addi-
tional 5 minutes.
Remove the oil tank filler cap 1
, wipe the
dipstick 2
clean, and then screw the filler
cap into the filler hole completely.
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3-16
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POWER UNIT
Remove the oil tank filler cap again and
check that the oil level is between the
minimum level mark a
and maximum
level mark b
on the dipstick.
If the engine oil is below the minimum
level mark b
, add sufficient oil of the rec-
ommended type to raise it to the correct
level.
If the engine oil is above the maximum
level mark a
, extract sufficient oil using
an oil changer to lower it to the correct
level.
NOTE:
If the oil temperature is low, the reading on
the dipstick will be low, and if the tempera-
ture is high, the reading on the dipstick will
be high.
Engine oil change — using oil changer
WARNING
Avoid changing the engine oil immediately
after turning the engine off. The oil is hot
and should be handled with care to avoid
burns.
CAUTION:
Do not run the engine with too much or
not enough oil in the oil tank. Oil could
spray out or the engine could be dam-
aged.
Do not run the engine for more than 15
seconds without supplying water, when
checking the oil level on land.
The engine could overheat.
Be sure to change the engine oil after the
first 10 hours of operation, and every 100
hours thereafter or at the start of a new
season, otherwise the engine will wear
quickly.
1. Warm the engine up, and then put the
watercraft in a horizontal position.
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3-19
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POWER UNIT
5. Remove the air filter element and check it
for dirt and oil. Replace the air filter ele-
ment if there is any oil buildup.
CAUTION:
Do not start the engine with the air filter
case removed, otherwise the engine
could be damaged.
If cleaning the air filter element, use cold
or lukewarm water and let it air dry com-
pletely. Do not use detergent or a solvent
to clean the air filter element, or dry it with
heat or compressed air, otherwise it
could be damaged.
6. Install:
Air filter element
NOTE:
Install the air filter element with its projections
a
facing away from the projections b
on the
air filter case.
7. Install:
Air filter case cover
8. Install:
Air filter case
T R..
Air filter case cover screw (short):
1.5 N  m (0.15 kgf  m, 1.1 ft  lb)
LOCTITE 572
Air filter case cover screw (long):
1.2 N  m (0.12 kgf  m, 0.9 ft  lb)
LOCTITE 572
T R..
Air filter case:
17 N  m (1.7 kgf  m, 12 ft  lb)
a
b
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POWER UNIT
Spark plug inspection
1. Remove:
Ignition coils
CAUTION:
Be careful not to get any foreign sub-
stances or water in spark plug hole.
2. Inspect:
Electrodes 1

Damage/wear →
Replace.
Insulator color 2

Distinctly different color →
Check the
engine condition.
Color guide:
Medium to light tan color:
Normal
Whitish color:
Lean fuel mixture
Air leak
Incorrect settings
Blackish color:
Overly rich mixture
Electrical malfunction
Defective spark plug
3. Clean:
Spark plug
(with a spark plug cleaner or wire brush)
4. Measure:
Spark plug gap a

Out of specification →
Regap.
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
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ELECTRICAL
ELECTRICAL
Battery inspection
WARNING
Battery electrolyte is poisonous and dan-
gerous, causing severe burns, etc. Electro-
lyte contains sulfuric acid. Avoid contact
with skin, eyes or clothing.
Antidotes
External: Flush with water.
Internal: Drink large quantities of water or
milk. Follow with milk of magnesia, beaten
egg or vegetable oil. Call physician immedi-
ately.
Eyes: Flush with water for 15 minutes and
get prompt medical attention.
Batteries produce explosive gases. Keep
sparks, flame, cigarettes, etc., well away. If
using or charging the battery in an
enclosed space, make sure that it is well
ventilated. Always shield your eyes when
working near batteries.
KEEP OUT OF THE REACH OF CHILDREN.
CAUTION:
Be careful not to place the battery on its
side.
Make sure to remove the battery from the
battery compartment when adding battery
electrolyte or charging the battery.
When checking the battery, make sure the
breather hose is connected to the battery
and not obstructed.
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4-14
EFUEL
THROTTLE BODY ASSEMBLY AND INTAKE
MANIFOLD
Fuel hose installation (replacing with new
fuel hose)
1. Install:
Fuel hose 1

NOTE:
To install the fuel hose, be sure to align the
white mark a
of the fuel hose with the
checker tab 2
of the quick connector.
When replacing the fuel hose with a new
one, a checker tab 2
that has half engage-
ment prevention is attached to the quick con-
nector of the hose. If the quick connector is
completely installed to the fuel pipe, it is
removable.
2
1a
2
Fuel hose connection
1. Apply a thin coat of engine oil to the con-
tact surfaces of the fuel pipe.
2. Insert the quick connector into the fuel
pipe until you hear a “click.”
3. To check the connection of the quick con-
nector, push and pull on the quick connec-
tor several times until there is free play of
2–3 mm (0.08–0.12 in).
NOTE:
If free is not obtained, disconnect the fuel hose
and check the O-ring for damage and that it is
properly installed.
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5-5
EPOWRENGINE UNIT
5. Measure:
Compression pressure
Out of specification →
Refer to steps (b)
and (c).
6. Install:
Spark plug
Minimum compression pressure
(reference data):
1,150 kPa
(11.5 kgf/cm
2, 164 psi)
Measurement steps:
a. With the throttle wide open, crank the
engine until the reading on the compres-
sion gauge stabilizes.
NOTE:
The difference in compression pressure
between cylinders should not exceed 100
kPa (1 kgf/cm2, 14 psi).
b. If the compression pressure is extremely
high, check the cylinder head, valve sur-
faces and piston crown for carbon depos-
its.
Carbon deposits →
Eliminate.
c. If the compression pressure is below the
minimum specification, squirt a few drops
of oil into the cylinder and measure
again.
Refer to the following table.
Compression pressure
(with oil applied into the cylinder)
Reading Diagnosis
Higher than
without oilPiston ring wear,
piston wear or
damage
→ Repair.
Same as without
oilValves, cylinder
head gasket or pis-
ton possibly defec-
tive
→ Repair.
T R..
Spark plug:
13 N  m (1.3 kgf  m, 9.4 ft  lb)
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