Maintenance
68
5.
When fitting the plug, wipe off any dirt
from the threads, and then screw it in to
the correct torque.
TIP:
If a torque-wrench is not available when you
are reinstalling a spark plug, a good estimate
of the correct torque is 1/12 turn past finger-
tight. When you are installing a new spark
plug, a good estimate of the correct torque is
1/2 to 2/3 turn past finger-tight.
6.
Install the ignition coil and tighten the
bolts.
7.
Install the ECM (Electronic control mod-
ule) cover and tighten the bolts.
EMU29045
Inspecting idle speed
WARNING
EWM00452
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.
NOTICE
ECM00491
This procedure must be performed while
the outboard motor is in the water. A flush-
ing attachment or test tank can be used.
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.
1.
Start the engine and allow it to warm up
fully in neutral until it is running smoothly.
2.
Once the engine has warmed up, verify
whether the idle speed is set to specifi-
cation. For idle speed specifications, see
page 9. If you have difficulty verifying the
idle speed, or the idle speed requires ad-
justment, consult a Yamaha dealer or
other qualified mechanic.
EMU37487
Changing engine oil
WARNING
EWM00761
Avoid draining the engine oil immediate-
ly after stopping the engine. The oil is
hot and should be handled with care to
avoid burns.
Be sure the outboard motor is securely
fastened to the transom or a stable
stand.
1. Spark plug gap
2. Spark plug part number
3. Spark plug I.D. mark (NGK)
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
Spark plug torque:
25 Nm (2.55 kgf-m, 18.4 ft-lb)
Bolt tightening torque:
7 Nm (0.71 kgf-m, 5.2 ft-lb)
Bolt tightening torque:
8 Nm (0.82 kgf-m, 5.9 ft-lb)
U6P27AE0.book Page 68 Friday, December 6, 2013 6:17 PM
