Checks After Starting Engine; Cooling Water; Warming Up Engine; Procedure For Warming Up Engine - Yamaha F90 Owner's Manual

the battery will be quickly discharged,
thus making it impossible to start the
engine. The starter can also be dam-
aged. If the engine will not start after 5
seconds of cranking, return the main
switch to " " (on), wait 10 seconds,
then crank the engine again.
TIP:
When the engine is cold, it needs to be
warmed up. For further information, see
page 61.
If the engine is warm and fails to start, open
the throttle slightly and try to start the en-
gine again. If the engine still fails to start,
see page 92.
EMU36511

Checks after starting engine

EMU36524

Cooling water

Check for a steady flow of water from the
cooling water pilot hole. A continuous flow of
water from the pilot hole indicates that the
water pump is pumping water through the
cooling water passages. If the cooling water
passages are frozen, it may take a while for
water to start flowing out of the pilot hole.
ECM01811
NOTICE
If water is not flowing out of the pilot hole
at all times while the engine is running,
overheating and serious damage could
occur. Stop the engine and check whether
the cooling water inlet on the lower case
or the cooling water pilot hole is blocked.
Consult your Yamaha dealer if the prob-
lem cannot be located and corrected.
[ECM00193]
1. Cooling water pilot hole
EMU27671
EMU41234

Procedure for warming up engine

1. After starting the engine, warm up the
engine until the engine speed stabilizes
at idle speed to provide maximum oper-
ating performance and acceleration.
NOTICE: Failure to do so will shorten
engine life.
Idle speed (in neutral):
700–800 r/min
2. Check that the low oil pressure-alert indi-
cator remains off. NOTICE: If the low oil
pressure-alert indicator blinks after
the engine starts, stop the engine.
Otherwise, serious engine damage
could occur. Consult your Yamaha
dealer.
EMU36532

Checks after engine warm up

EMU36542

Shifting

While the boat is tightly moored, and without
applying throttle, confirm that the engine
shifts smoothly into forward and reverse, and
back to neutral.
Operation
1

Warming up engine

[ECM04550]
[ECM02381]
ZMU08095
61