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Maintenance
4
3
2
1
1. Filter cup ring nut
2. Float
3. Filter cup
4. O-ring
5. Filter element
6. Filter housing
4.
Reinstall the filter element in the cup.
Make sure the O-ring is in position in the
cup. Insert the cup and O-ring into the fil-
ter housing. Lift up and hold the locking
tab to screw the ring nut onto the filter
housing until the ring is lightly seated.
5.
Tighten the ring nut approximately an
additional 1/4 turn until the ring nut is
tight. Align one of the four larger ring nut
tabs with the locking tab and release it to
lock the ring nut in position.
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.
EMU29041
Inspecting idling speed
EWM00451
WARNING
Do not touch or remove electrical parts
G
when starting or during operation.
Keep hands, hair, and clothes away
G
59
from the flywheel and other rotating
parts while the engine is running.
6
ECM00490
CAUTION:
5
This procedure must be performed while
the outboard motor is in the water. A
flushing attachment or test tank can be
used.
ZMU04836
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 smooth-
ly.
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 ver-
ifying the idle speed, or the idle speed re-
quires adjustment, consult a Yamaha dealer
or other qualified mechanic.
2.
Verify whether the idle speed is set to
specification. For idle speed specifica-
tions, see page 47.
EMU29050
Checking water in engine oil tank
Oil injection models
There is a water trap at the bottom of the en-
gine oil tank. If water or foreign matter is vis-
ible in this trap, consult your Yamaha dealer.
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