Inspecting Idle Speed; Changing Engine Oil - Yamaha FL250G Owner's Manual

Maintenance
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)
5. When fitting the plug, wipe off any dirt
from the threads, and then screw it in to
the correct torque.
Spark plug torque:
25.0 Nm (2.55 kgf-m, 18.4 ft-lb)
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 turn past finger-
tight. Have the spark plug adjusted to the cor-
rect torque as soon as possible with a torque-
wrench.
6. Install the ignition coil and tighten the
bolts.
Bolt tightening torque:
7.0 Nm (0.71 kgf-m, 5.2 ft-lb)
7. Install the ECM (Electronic control mod-
ule) cover and tighten the bolts.
Bolt tightening torque:
8.0 Nm (0.82 kgf-m, 5.9 ft-lb)
62
EMU29044

Inspecting idle speed

EWM00451
WARNING
Do not touch or remove electrical parts
G
when starting or during operation.
Keep hands, hair, and clothes away from
G
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 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 conduct-
ed 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 specifica-
tion. For idle speed specifications, see
page 8. If you have difficulty verifying the
idle speed, or the idle speed requires ad-
justment, consult a Yamaha dealer or
other qualified mechanic.
EMU37494

Changing engine oil

ECM01710
NOTICE
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.
The engine oil should be extracted with an oil
changer.