2006 YAMAHA RHINO 660 spark plug

Tire wear limit......................................5-35
OPERATION ............................................6-1
Starting a cold engine ...........................6-3
Starting a warm engine .........................6-9
Jump-starting ........................................6-9
Warming up.........................................6-13
Drive select lever operation and
reverse driving ..................................6-15
Engine break-in ...................................6-21
Parking ................................................6-25
Parking on a slope ..............................6-25
Accessories and loading .....................6-29
DRIVING YOUR VEHICLE .......................7-1
Getting to know your vehicle .................7-1
Learning to operate your vehicle...........7-9
Turning your vehicle............................7-13
Braking ................................................7-15
Going uphill .........................................7-17
Going downhill ....................................7-21
Crossing through shallow water ..........7-27
Riding over rough terrain ....................7-33
Riding in brush or wooded areas ........7-35
Encountering obstacles on the trail .....7-37
67
PERIODIC MAINTENANCE AND
ADJUSTMENT ......................................... 8-1
Owner’s manual and tool kit ................. 8-3
Periodic maintenance/lubrication.......... 8-7
Hood ................................................... 8-17
Console .............................................. 8-21
Engine oil and oil filter cartridge ......... 8-23
Final gear oil ....................................... 8-35
Differential gear oil.............................. 8-41
Coolant ............................................... 8-47
Axle boots ........................................... 8-51
Spark plug inspection ......................... 8-53
Cleaning the air filter elements ........... 8-61
V-belt cooling duct check hose ........... 8-73
V-belt case drain plug ......................... 8-75
Carburetor adjustment ........................ 8-77
Idle speed adjustment ........................ 8-79
Valve clearance adjustment ............... 8-81
Front brake pad check ........................ 8-83
Rear brake pad check ........................ 8-85
Checking the brake fluid level............. 8-85
Brake fluid replacement ...................... 8-89
Checking the brake pedal ................... 8-91
Parking brake lever free play
adjustment ........................................ 8-93
Brake light switch adjustment ............. 8-97
Cable inspection and lubrication......... 8-99
8
EE.book Page 2 Monday, July 11, 2005 2:32 PM

3-1
EVU00080
1-DESCRIPTION AND VEHICLE IDENTIFICATION
1. Headlights
2. Front shock absorber assembly adjusting ring
3. Brake fluid reservoir
4. Air filter elements (engine and air intake duct)
5. V-belt case
6. Driver seat
7. Driver seat belt
8. Spark plug
9. Cargo bed
10. Tail/brake lights
11. Rear shock absorber assembly adjusting ring
12. Cargo bed release levers
13. Passenger seat belt
14. Passenger seat
15. Oil filter cartridge
16. Engine oil dipstick
17. Battery
18. Fuses
19. Coolant reservoir
20. Radiator cap
21. Fuel level check window
22. Fuel tank cap
EE.book Page 1 Monday, July 11, 2005 2:32 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.Fuel line*Check fuel hose for cracks or damage.
Replace if necessary.EE.book Page 7 Monday, July 11, 2005 2:32 PM

8-53 1. Spark plug cap
1. Capuchon de bougie
1. Tapa de bujía
1. Spark plug wrench
1. Clé à bougie
1. Llave de bujías
EVU00750
Spark plug inspection
Removal
1. Lift the cargo bed up. (See pages 4-51–4-55
for cargo bed lifting and lowering proce-
dures.)
2. Remove the spark plug cap.
3. Use the spark plug wrench in the tool kit to re-
move the spark plug as shown.
EE.book Page 53 Monday, July 11, 2005 2:32 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 Monday, July 11, 2005 2:32 PM

8-57 a. Spark plug gap
a.Écartement des électrodes
a. Distancia entre electrodos de la bujía
Installation
1. Measure the electrode gap with a wire thick-
ness gauge and, if necessary, adjust the gap
to specification.
2. Clean the surface of the spark plug gasket
and its mating surface, and then wipe off any
grime from the spark plug threads.
3. Install the spark plug and tighten it to the
specified torque. Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf, 12.7 ft·lbf)
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8-59
NOTE:_ If a torque wrench is not available when you are in-
stalling the spark plug, a good estimate of the cor-
rect torque is 1/4 to 1/2 turn past finger tight. Have
the spark plug tightened to the specified torque as
soon as possible. _4. Install the spark plug cap.
5. Lower the cargo bed.
EE.book Page 59 Monday, July 11, 2005 2:32 PM

8-79 1. Throttle stop screw
1. Vis de butée de papillon des gaz
1. Tornillo de tope del acelerador
EVU00810
Idle speed adjustmentNOTE:_ A diagnostic tachometer must be used for this pro-
cedure. _1. Start the engine and warm it up for a few min-
utes at approximately 1,000 to 2,000 r/min.
Occasionally rev the engine to 4,000 to 5,000
r/min. The engine is warm when it quickly re-
sponds to the throttle.
2. Remove the seats. (See page 4-43 for seat
removal and installation procedures.)
3. Remove the console. (See page 8-21 for
console removal and installation proce-
dures.)
4. Connect the tachometer to the spark plug
lead, and then set the idle to the specified
idling speed by adjusting the throttle stop
screw. Turn the screw in direction
a to in-
crease the engine speed, and in direction
b
to decrease the engine speed.
Specified idle speed:
1,450–1,550 r/min
EE.book Page 79 Monday, July 11, 2005 2:32 PM