Inspecting Idle Speed; Changing Engine Oil - Yamaha F4 Owner's Manual

eign material is found in the filters, clean or
replace them. For cleaning or replacement of
the fuel filters, consult a Yamaha dealer.
1
1. Fuel filter
EMU40141

Inspecting idle speed

ECM02231
NOTICE
When checking the engine idle speed,
make sure to supply water to the cooling
water passages by placing the outboard
motor in the water or by using a flushing
attachment or test tank.
To check the engine idle speed, a diagnostic
tachometer is required. For checking or ad-
justment of the engine idle speed, consult a
Yamaha dealer.
EMU3951C

Changing engine oil

EWM00761
WARNING
 Avoid draining the engine oil immediate-
ly after stopping the engine. The oil is
hot and should be handled with care to
avoid burns.
 Be sure the outboard motor is securely
fastened to the transom or a stable
stand.
1
ZMU07629
ECM01711
NOTICE
Change the engine oil after the first 20
hours of operation or 3 months, and every
100 hours or at 1-year intervals thereafter.
Otherwise the engine will wear quickly.
To prevent spilling oil where it could cause
damage to nature, it is strongly recommend-
ed that you use an oil changer to change the
engine oil. If an oil changer is not available,
drain the engine oil by removing the drain
screw. If you are not familiar with the proce-
dure for changing the engine oil, consult your
Yamaha dealer.
1. Put the outboard motor in an upright po-
sition (not tilted). NOTICE: If the out-
board motor is not level, the oil level
indicated on the oil dipstick may not
be accurate.
[ECM01862]
2. Start the engine. Warm it up and keep
the idle speed for 5-10 minutes.
3. Stop the engine and leave it for 5-10 min-
utes.
4. Remove the top cowling.
5. Remove the oil filler cap.
Maintenance
ZMU06766
65