Checking Fuel Filter; Inspecting Idling Speed; Changing Engine Oil - Yamaha F4 Owner's Manual

Maintenance
Checkpoints
Fuel system parts leakage
G
Fuel line joint leakage
G
Fuel line cracks or other damage
G
Fuel connector leakage
G
EMU28990

Checking fuel filter

Check the fuel filter periodically. The fuel fil-
ter is a one piece, disposable type. If foreign
matter is found in the filter, replace it. For re-
placement of the fuel filter, consult your
Yamaha dealer.
43
EMU29041

Inspecting idling speed

EWM00451
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.
ECM00490
CAUTION:
This procedure must be performed while
the outboard motor is in the water. A
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
ZMU04505
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 34.
EMU29103

Changing engine oil

EWM00760
Avoid draining the engine oil immedi-
G
ately after stopping the engine. The oil
ZMU02708
WARNING
WARNING