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Maintenance
2. Filter cup ring nut
2.
Remove the filter cup, catching any
spilled fuel in a rag.
3.
Remove the filter element, and inspect it
and the O-ring to make sure they are in
good condition. Replace them if neces-
sary. If any water is found in the fuel, the
Yamaha portable fuel tank or other fuel
tanks should be checked and cleaned.
6
1
5
2
1. Filter cup
2. Filter cup ring nut
3. Filter element
4. Filter housing
5. Float
6. O-ring
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 can be seen in the filter cup, re-
move the cup and drain the water.
51
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
G
from 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
4
could unexpectedly start to move,
which could result in an accident.
3
ECM00490
CAUTION:
This procedure must be performed while
the outboard motor is in the water. A
ZMU01894
flushing 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 smooth-
ly.
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 ver-
ifying the idle speed, or the idle speed re-
quires adjustment, consult a Yamaha dealer
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