2007 YAMAHA RHINO 660 Engine oul

7-23
WARNING
Going down a hill improperly could cause loss
of control or cause the vehicle to overturn.

Always check the terrain carefully before
you start down any hill.


Never go down a hill at high speed.


Avoid going down a hill at an angle that
would cause the vehicle to lean sharply to
one side. Go straight down the hill where
possible.
Before starting down hill, make sure the vehicle is
in low-range 4WD. On most slopes, this will let you
use engine braking to help you go downhill slowly.
Go as slowly as possible. If you are starting to go
too fast, apply the brakes gently. Avoid sudden ap-
plication of the brakes, which could cause the ve-
hicle to start sliding.
If you are sliding or skidding, try to steer in the di-
rection the vehicle is sliding to help you regain con-
trol.
EE.book Page 23 Friday, August 4, 2006 12:02 PM

8-7
EVU00671
PERIODIC MAINTENANCE/LUBRICATION
NOTE:

For vehicles not equipped with an odometer or hour meter, follow the month maintenance intervals.


For vehicles equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance intervals.
However, keep in mind that if the vehicle isn’t used for a long period of time, the month maintenance intervals
should be followed.


Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and
technical skills.
ITEM ROUTINEWhichever
comes firstINITIAL EVERY
month136612
km
(mi)320
(200)1,200
(750)2,400
(1,500)2,400
(1,500)4,800
(3,000)
hours 20 75 150 150 300
Valves*Check valve clearance.
Adjust if necessary.
Cooling systemCheck coolant leakage.
Repair if necessary.
Replace coolant every 24 months.Spark plugCheck condition.
Adjust gap and clean.
Replace if necessary.Air filter elements
(engine and air intake duct)Clean.
Replace if necessary.Every 20–40 hours
(More often in wet or dusty areas.)
Carburetor*Check idle speed/starter operation.
Adjust if necessary.Crankcase breather
system*Check breather hose for cracks or damage.
Replace if necessary.Exhaust system*Check for leakage.
Tighten if necessary.
Replace gasket(s) if necessary.Spark arresterClean.EE.book Page 7 Friday, August 4, 2006 12:02 PM

8-23
EVU00701
Engine oil and oil filter cartridge
The engine oil level should be checked before
each operation. In addition, the oil must be
changed and the oil filter cartridge replaced at the
intervals specified in the periodic maintenance and
lubrication chart.
To check the engine oil level
1. Place the vehicle on a level surface.
2. Remove the console. (See page 8-21 for
console removal and installation proce-
dures.)
3. Check the engine oil level on a cold engine.NOTE:If the engine was started before checking the oil
level, be sure to warm up the engine sufficiently,
and then wait at least ten minutes until the oil set-
tles for an accurate reading.
EE.book Page 23 Friday, August 4, 2006 12:02 PM

8-25 1. Maximum level mark 2. Minimum level mark
3. Dipstick 4. Engine oil filler cap
1. Repère de niveau maximum 2. Repère de niveau minimum
3. Jauge
4. Bouchon de remplissage de l’huile moteur
1. Marca de nivel máximo 2. Marca de nivel mínimo
3. Varilla de medición
4. Tapón de llenado de aceite del motor
4. Remove the engine oil filler cap and wipe off
the dipstick with a clean rag.
5. Insert the dipstick in the oil filler hole (without
screwing it in), and then remove it again to
check the oil level.NOTE:_ The engine oil should be between the minimum
and maximum level marks. _6. If the engine oil is at or below the minimum
level mark, add sufficient oil of the recom-
mended type to raise it to the correct level.
7. Insert the dipstick into the oil filler hole, and
then tighten the oil filler cap.
8. Install the console.
EE.book Page 25 Friday, August 4, 2006 12:02 PM

8-47 1. Coolant reservoir cap
2. Maximum level mark 3. Minimum level mark
1. Bouchon du vase d’expansion
2. Repère de niveau maximum 3. Repère de niveau minimum
1. Tapón del depósito de líquido refrigerante
2. Marca de nivel máximo 3. Marca de nivel mínimo
EVU00732
Coolant
The coolant level should be checked before each
ride.
Checking the coolant level
1. Place the vehicle on a level surface.
2. Open the hood. (See pages 8-17–8-19 for
hood opening and closing procedures.)
3. Check the coolant level in the coolant reser-
voir when the engine is cold as the coolant
level varies with engine temperature.NOTE:_ The coolant should be between the minimum and
maximum level marks. _4. If the coolant is at or below the minimum level
mark, remove the reservoir cap, add coolant
to the maximum level mark, install the reser-
voir cap, and then close the hood.
Coolant reservoir capacity
(up to the maximum level mark):
0.35 L (0.31 Imp qt, 0.37 US qt)
EE.book Page 47 Friday, August 4, 2006 12:02 PM

8-55
Inspection
The spark plug is an important engine component
and is easy to inspect. The condition of the spark
plug can indicate the condition of the engine.
The ideal color of the porcelain insulator around
the center electrode is a medium-to-light tan for a
vehicle that is being ridden normally.
Do not attempt to diagnose such problems your-
self.
Instead, take the vehicle to a Yamaha dealer. You
should periodically remove and inspect the spark
plug because heat and deposits will cause the
spark plug to slowly break down and erode. If elec-
trode erosion becomes excessive, or if carbon and
other deposits are excessive, you should replace
the spark plug with the specified plug.
Specified spark plug:
DPR8EA-9 (NGK)
EE.book Page 55 Friday, August 4, 2006 12:02 PM

8-67 1. Air filter frame 2. Sponge material
3. Element retaining plate
1. Armature de filtre à air 2.Élément en mousse
3. Plaque de retenue de l’élément
1. Bastidor del filtro de aire 2. Material esponjoso
3. Placa de retención del filtro
5. Remove the sponge material from its frame.
6. Wash the sponge material gently but thor-
oughly in solvent.
WARNING
Always use parts cleaning solvent to clean the
sponge material. Never use low flash point sol-
vents or gasoline to clean the sponge material
because the engine could catch fire or ex-
plode.7. Squeeze the excess solvent out of the
sponge material and let it dry.CAUTION:_ Do not twist the sponge material when squeez-
ing it. _
EE.book Page 67 Friday, August 4, 2006 12:02 PM

8-71
NOTE:_ The air filter element should be cleaned every 20–
40 hours. It should be cleaned and lubricated more
often if the vehicle is operated in extremely dusty
areas. Each time air filter element maintenance is
performed, check the air inlet to the air filter case
for obstructions. Check the air filter element rubber
joint to the carburetor and manifold fittings for an
airtight seal. Tighten all fittings securely to avoid
the possibility of unfiltered air entering the engine. _CAUTION:_ Never operate the engine with the air filter ele-
ment removed. This will allow unfiltered air to
enter, causing rapid engine wear and possible
engine damage. Additionally, operation with-
out the air filter element will affect carburetor
jetting with subsequent poor performance and
possible engine overheating.
EE.book Page 71 Friday, August 4, 2006 12:02 PM