Inspecting Engine Idle Speed - Yamaha F225F Owner's Manual

Maintenance
To check the spark plug
1. Check the condition of the spark plug. If
electrode erosion becomes excessive or
carbon and other deposits are exces-
sive, replace the spark plug with the
specified plug.
Standard spark plug:
LFR6A-11
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.
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)
77
To install the spark plug
1. Wipe off any dirt from the threads, insu-
lator, and gasket surface of the spark
plug.
2. Install the spark plug, and then tighten it
to the specified torque.
Spark plug tightening torque:
28 Nm (2.86 kgf-m, 20.7 ft-lb)
ZMU06948
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.
3. Install the ignition coil, and then tighten
the bolt to the specified torque.
Bolt tightening torque:
8 Nm (0.82 kgf-m, 5.9 ft-lb)
4. Install the ECM cover.
5. Install the flywheel magnet cover, and
then tighten the bolt to the specified
torque.
Bolt tightening torque:
8 Nm (0.82 kgf-m, 5.9 ft-lb)
EMU41872

Inspecting engine idle speed

ECM01691
NOTICE
This procedure must be performed while
the outboard motor is in the water.
Inspect the engine idle speed using the me-
ter that is equipped on the boat. Results may
vary depending on whether testing is con-
ducted with the outboard motor in the water.
1. Start the engine and allow it to warm up
fully in neutral until it is running smooth-