2017 YAMAHA GRIZZLY 350 check engine

8-23
8
EBU23932V-belt case drain plugAfter riding in water deep enough to allow it to en-
ter the V-belt case, remove the V-belt case drain
plug to drain the water from the case.TIPIf water drains from the V-belt case after removing
the plug, have a Yamaha dealer check the ATV as
the water may affect other engine parts.
EBU23941Adjusting the carburetorThe carburetor should be checked and, if neces-
sary, adjusted at the intervals specified in the pe-
riodic maintenance and lubrication chart. The
carburetor is an important part of the engine and
requires very sophisticated adjustment. There-
fore, most carburetor adjustments should be left
to a Yamaha dealer, who has the necessary pro-
fessional knowledge and experience. The adjust-
ment described in the following section, however,
may be performed by the owner as part of routine
maintenance.NOTICEECB00481The carburetor has been set and extensively
tested at the Yamaha factory. Changing these
settings without sufficient technical knowl-
edge may result in poor performance of or
damage to the engine. EBU24001Adjusting the engine idling speedThe engine idling speed must be checked and, if
necessary, adjusted as follows at the intervals
specified in the periodic maintenance and lubrica-
tion chart.
1. V-belt case drain plugUB1463E0.book Page 23 Thursday, August 4, 2016 2:12 PM

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8
TIPA diagnostic tachometer is needed to make this
adjustment. 1. Start the engine and warm it up.TIPThe engine is warm when it quickly responds to
the throttle. 2. Attach the tachometer to the spark plug lead.
3. Check the engine idling speed and, if neces-sary, adjust it to specification by turning the
throttle stop screw at the carburetor. To in-
crease the engine idling speed, turn the throt-
tle stop screw in direction (a), and to decrease
it, turn the screw in direction (b).
TIPIf the specified idling speed cannot be obtained as
described above, have a Yamaha dealer make the
adjustment. EBU24048Adjusting the throttle lever free playThe throttle lever free play should be checked and,
if necessary, adjusted at the intervals specified in
the periodic maintenance and lubrication chart.1. Throttle stop screwEngine idling speed:1450–1550 r/min
UB1463E0.book Page 24 Thursday, August 4, 2016 2:12 PM

8-25
8The throttle lever free play should measure 3.0–5.0
mm (0.12–0.20 in) as shown. Periodically check
the throttle lever free play and, if necessary, adjust
it as follows.
TIPThe engine idling speed must be checked, and
adjusted if necessary, before adjusting the throttle
lever free play. 1. Slide the rubber cover back.
2. Loosen the locknut.
3. To increase the throttle lever free play, turn
the throttle lever free play adjusting bolt in di-
rection (a). To decrease the throttle lever free
play, turn the adjusting bolt in direction (b). 4. Tighten the locknut.
5. Slide the rubber cover to its original position.
EBU24061Valve clearanceThe valve clearance changes with use, resulting in
improper air-fuel mixture and/or engine noise. To
prevent this from occurring, the valve clearance
must be adjusted by a Yamaha dealer at the inter-
vals specified in the periodic maintenance and lu-
brication chart.1. Rubber cover
2. Locknut
3. Throttle lever free play adjusting bolt
4. Throttle lever free play12
3 4
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8
EBU25754Troubleshooting chart
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.There is no fuel.
Check the battery.
Supply fuel.
The engine does not start.
Check the battery.
The engine does not start.
Check the ignition.
Operate the electric starter.4. Compression
There is compression.
There is no compression.
The engine does not start. Have a Yamaha dealer check the ATV.Have a Yamaha dealer check the ATV.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug. Have a Yamaha dealer check the ATV.
The engine does not start.
Check the compression.
Operate the electric starter.2. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.
UB1463E0.book Page 47 Thursday, August 4, 2016 2:12 PM

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9
EBU25934StorageShort-term
Always store your ATV in a cool, dry place and, if
necessary, protect it against dust with a porous
cover. NOTICE: Storing the ATV in a poorly ven-
tilated room or covering it with a tarp while it is
still wet, will allow water and humidity to seep
in and cause rust. To prevent corrosion, avoid
damp cellars, stables (because of the presence
of ammonia) and areas where strong chemi-
cals are stored.
[ECB00722]
Long-term
Before storing your ATV for several months: 1. Follow all the instructions in the “Cleaning” section of this chapter.
2. Turn the fuel cock lever to “OFF”.
3. Drain the carburetor float chamber by loosen- ing the drain bolt; this will prevent fuel depos-
its from building up. Pour the drained fuel into
the fuel tank.
4. Fill up the fuel tank and add fuel stabilizer (if available) to prevent the fuel from deteriorat-
ing. 5. Perform the following steps to protect the cyl-
inder, piston rings, etc. from corrosion.a. Remove the spark plug cap and spark plug.
b. Pour a teaspoonful of engine oil into the spark plug bore.
c. Install the spark plug cap onto the spark plug, and then place the spark plug on the
cylinder head so that the electrodes are
grounded. (This will limit sparking during
the next step.)
d. Turn the engine over several times with the starter. (This will coat the cylinder wall
with oil.)
e. Remove the spark plug cap from the spark plug, and then install the spark plug and
the spark plug cap.
6. Lubricate all control cables and the pivoting points of all levers and pedals.
7. Check and, if necessary, correct the tire air pressure, and then block up the ATV so that
all of its wheels are off the ground. Alterna-
Specified amount:
7.5 ml of stabilizer to each liter of fuel (or 1
oz of stabilizer to each gallon of fuel)UB1463E0.book Page 2 Thursday, August 4, 2016 2:12 PM

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12
INDEX
AAccessories and loading ................................................ 6-6
Air filter element, cleaning ........................................... 8-18BBattery ......................................................................... 8-37
Brake fluid, changing ................................................... 8-29
Brake fluid level, checking ........................................... 8-27
Brake lever free play, checking the front ..................... 8-29
Brake lever, front ........................................................... 4-5
Brake levers, checking and lubricating ........................ 8-35
Brake light switches ..................................................... 8-34
Brake pads and shoes, checking ................................ 8-26
Brake pedal and rear brake lever ................................... 4-6
Brake pedal, checking and lubricating ........................ 8-36
Brakes .......................................................................... 8-26
Brakes, front and rear .................................................... 5-3CCables, checking and lubricating ................................ 8-35
Carburetor, adjusting ................................................... 8-23
Carrier, front ................................................................. 4-14
Carrier, rear .................................................................. 4-14
Chassis fasteners .......................................................... 5-6
Cleaning ......................................................................... 9-1DDrive select lever ........................................................... 4-7
Drive select lever and driving in reverse ........................ 6-3
Drive select lever safety system cable, adjusting ........ 8-26EEngine break-in .............................................................. 6-4Engine, cold start ........................................................... 6-1
Engine idling speed ..................................................... 8-23
Engine oil ....................................................................... 5-3
Engine oil and oil filter cartridge .................................. 8-11
Engine, starting a warm ................................................. 6-3
Engine stop switch ........................................................ 4-3
FFinal gear oil ......................................................... 5-3, 8-15
Fuel ......................................................................... 4-8, 5-3
Fuel cock ..................................................................... 4-10
Fuel tank cap ................................................................. 4-8
Fuses, replacing .......................................................... 8-40HHandlebar switches ....................................................... 4-3
Headlight beam, adjusting ........................................... 8-43
Headlight bulb, replacing ............................................. 8-42
Horn switch .................................................................... 4-4IIdentification numbers ................................................. 11-1
Indicator lights and warning light ................................... 4-2
Instruments, lights and switches ................................... 5-6LLabel locations ............................................................... 1-1
Light switch ................................................................... 4-4MMain switch .................................................................... 4-1
Maintenance and lubrication chart ................................ 8-5
Maintenance chart, emission control system ................ 8-3
Model label .................................................................. 11-1
UB1463E0.book Page 1 Thursday, August 4, 2016 2:12 PM