Maintenance
to slowly break down and erode.
the correct torque.
1.
Remove the spark plug caps from the
spark plugs.
Spark plug torque:
Nm (2.55 kgf-m, 18.4 ft-lb)
25.0
2.
Remove the spark plug. If electrode ero-
sion becomes excessive, or if carbon
and other deposits are excessive, you
should replace the spark plug with an-
other of the correct type. WARNING!
When removing or installing a spark
plug, be careful not to damage the in-
sulator. A damaged insulator could
allow external sparks, which could
TIP:
If a torque-wrench is not available when you
are fitting a spark plug, a good estimate of
the correct torque is 1/4 to 1/2 a turn past fin-
ger-tight. Have the spark plug adjusted to the
correct torque as soon as possible with a
torque-wrench.
EMU29043
Inspecting idling speed
lead to explosion or fire.
[EWM00561]
EWM00451
WARNING
Standard spark plug:
BKR6EKU
q
Do not touch or remove electrical parts
when starting or during operation.
3.
Be sure to use the specified spark plug,
otherwise the engine may not operate
properly. Before fitting the spark plug,
measure the electrode gap with a wire
thickness gauge; replace it if out of spec-
ification.
q Keep hands, hair, and clothes away
from the flywheel and other rotating
parts while the engine is running.
ECM00490
NOTICE
This procedure must be performed while
the outboard motor is in the water. A
flushing attachment or test tank can be
used.
3
1
If the boat is not equipped with a tachometer
for the outboard motor, use a diagnostic ta-
chometer for this procedure. Results may
vary depending on whether testing is con-
ducted with the flushing attachment, in a test
tank, or with the outboard motor in the water.
2
1
ZMU01892
1.
2.
3.
Spark plug gap
Spark plug part number
Spark plug I.D. mark (NGK)
1.
Start the engine and allow it to warm up
fully in neutral until it is running smooth-
ly.
2.
Once the engine has warmed up, verify
whether the idle speed is set to specifi-
cation. For idle speed specifications,
see page 13. If you have difficulty verify-
ing the idle speed, or the idle speed re-
Spark plug gap:
1.5
–1.6 mm (0.059–0.063 in)
4.
When fitting the plug, wipe off any dirt
from the threads, and then screw it in to
69
| Categories | Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha VZ200R, Yamaha VZ225H, Yamaha VZ250F, Yamaha VZ300B |
| Model Year | 2008 |
| Download File |
|
| Language | English |
| Product Brand | Yamaha Motor. Yamaha Motor Corporation, USA - Support Customer Relations for US: 1-800-962-7926
Yamaha Boats: 1-800-962-7926 Yamaha Outboard Customer Relations: 1-866-894-1626 , Yamaha Outboard |
| Document File Type | |
| Publisher | yamaha-motor.com |
| Wikipedia's Page | Yamaha Motor Company |
| Copyright | Attribution Non-commercial |
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