Inspecting Idling Speed - Yamaha F150D Owner's Manual

1. Filter cup
2. Filter cup ring nut
3. Filter housing
4. O-ring
5. Filter element
6. Float
4. Install the filter element and filter cup into
the filter housing.
5. Tighten the ring nut so that one of the
larger ring nut tabs is aligned with the lock
tab.
6. Run the engine and check the filter and
lines for leaks.
NOTE:
If any water is in the fuel, the red ring in the
fuel filter unit will float. If so, remove the cup
and drain the water.
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
start position during warm-up. The boat
could unexpectedly start to move, which
could result in an accident.
ECM00490
CAUTION:
This procedure must be performed while
the outboard motor is in the water. A flush-
ing attachment or test tank can be used.
A diagnostic tachometer should be used for
this procedure. Results may vary depending
on whether testing is conducted 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-hp model: Warm the engine with the
throttle in the start position or less. If the
outboard is mounted on a boat, be sure
the boat is tightly moored.
NOTE:
Correct idling speed inspection is only possi-
ble if the engine is fully warmed up. If not
warmed up fully, the idle speed will measure
higher than normal. If you have difficulty veri-
fying the idle speed, or the idle speed requires
adjustment, consult a Yamaha dealer or other
qualified mechanic.
Maintenance
51