Checks After Starting Engine; Cooling Water; Warming Up Engine; Warming Up - Yamaha F4 Owner's Manual

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.
1
1. Cooling water pilot hole
EMU27671

Warming up engine

EMU40073

Warming up

After starting the engine, return the choke
knob to the halfway position. For approxi-
mately the first 5 minutes after starting, warm
up the engine by operating at one fifth throttle
or less. After the engine has warmed up, push
the choke knob in fully. NOTICE: Failure to
do so will shorten engine life.
TIP:
 If the choke knob is left pulled out after the
engine starts, the engine will stall.
 In temperatures of -5°C (23°F) or less, leave
the choke knob pulled out fully for approx-
imately 30 seconds after starting.
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.
EMU36973

Stop switches

Perform the following procedure to check
that the engine stop button and engine shut-
off switch operate properly.
 Start the engine, and then check that the
engine stops when the engine stop button
is pushed.
 Restart the engine, and then check that the
engine stops when the clip is pulled from
the engine shut-off switch.
 Check that the engine cannot be started
with the clip removed from the engine shut-
off switch.
EMU39343
ZMU06747
EWM00181
WARNING
Before shifting, make sure there are no
swimmers or obstacles in the water near
you.
Operation
[ECM04550]
Shifting
43