Checking Fuel System; Inspecting Idling Speed - Yamaha F2.5D Owner's Manual

Maintenance
Before fitting the spark plug, measure the
electrode gap with a wire thickness gauge;
adjust the gap to specification if necessary.
1. Spark plug gap
2. Spark plug I.D. mark (NGK)
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
When fitting the plug, always clean the gasket
surface and use a new gasket. Wipe off any
dirt from the threads and screw in the spark
plug to the correct torque.
Spark plug torque:
25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
NOTE:
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 finger-
tight. Have the spark plug adjusted to the cor-
rect torque as soon as possible with a torque-
wrench.
EMU28961

Checking fuel system

EWM00900
WARNING
Gasoline and its vapors are highly flam-
mable and explosive. Keep away from
sparks, cigarettes, flames, or other sourc-
es of ignition.
37
EWM00910
WARNING
Leaking fuel can result in fire or explosion.
Check for fuel leakage regularly.
G
If any fuel leakage is found, the fuel sys-
G
tem must be repaired by a qualified me-
chanic. Improper repairs can make the
outboard unsafe to operate.
Check the fuel lines for leaks, crack, or mal-
function. If a problem is found, your Yamaha
dealer or other qualified mechanic should re-
pair it immediately.
Checkpoints
Fuel system parts leakage
G
Fuel line joint leakage
G
Fuel line cracks or other damage
G
Fuel connector leakage
G
EMU29040

Inspecting idling speed

EWM00450
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.
2-hp models: The propeller rotates
G
whenever the engine is running. Do not
move the throttle control lever from the