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74
2. Measure the spark plug gap using a
thickness gauge. If the spark plug gap is
out of specification, replace the spark
plug with the specified plug.
To install the spark plug
1. Wipe off any dirt from the threads, insula-
tor, and gasket surface of the spark plug.
2. Install the spark plug, and then tighten it
to the specified torque.
T
IP:
If a torque-wrench is not available when you
are fitting a spark plug, fully tighten a spark
plug with a spark plug wrench. Then tighten
1/4 to 1/2 turn more. Have the spark plug ad-
justed to the correct torque as soon as possi-
ble with a torque-wrench.
3. Install the ignition coil, and then tighten
the bolt to the specified torque.
4. Install the ECM cover.
5. Install the flywheel magnet cover.
EMU40872
Inspecting engine idle speed
NOTICE
ECM01690
This procedure must be performed while
the outboard motor is in the water.
Inspect the engine idle speed using the Com-
mand Link tachometer or digital tachometer
that is equipped on the boat. Results may
vary depending on whether testing is conduct-
ed 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. Inspect the engine idle speed. If the en-
gine idle speed is out of specification,
consult a Yamaha dealer or other quali-
fied mechanic.
EMU41203
Changing engine oil
NOTICE
ECM01710
Change the engine oil after the first 20
hours of operation or 3 months, and every
100 hours or at 1-year intervals thereafter.
Otherwise the engine will wear quickly.
When changing the engine oil, the outboard
motor must be placed in a vertical position. If
you are not able to place the outboard motor
in a vertical position, have a Yamaha dealer
change the engine oil.
Standard spark plug:
LFR6A-11
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 tightening torque:
28.0 Nm (2.86 kgf-m, 20.7 ft-lb)
Bolt tightening torque:
8.0 Nm (0.82 kgf-m, 5.9 ft-lb)
Idle speed (in neutral):
750 ±50 r/min
U6CB10E0.book Page 74 Wednesday, September 30, 2009 9:49 AM