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.
EMU37450
Checking fuel filter
lead to explosion or fire.
[EWM00561]
Check the fuel filter periodically. If any water
or foreign matter is found in the filter, clean or
replace it. For cleaning or replacement of the
fuel filter, consult your Yamaha dealer.
Standard spark plug:
B7HS-10
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.
ZMU06140
EMU29043
Inspecting idling speed
EWM00451
WARNING
q
q
Do not touch or remove electrical parts
when starting or during operation.
Keep hands, hair, and clothes away
from the flywheel and other rotating
parts while the engine is running.
1.
2.
3.
Spark plug gap
Spark plug I.D. mark (NGK)
Spark plug part number
Spark plug gap:
ECM00490
NOTICE
0.9
–1.0 mm (0.035–0.039 in)
This procedure must be performed while
the outboard motor is in the water. A
4.
When fitting the plug, wipe off any dirt
from the threads, and then screw it in to
61
| Categories | Marine, Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha 25 |
| 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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