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Operation
EMU36511
Checks after starting engine
EMU41361
Cooling water
Check for a steady flow of water from the
cooling water pilot hole. A continuous flow of
water from the cooling water pilot hole shows
that the water pump is pumping water
through the cooling water passages.
TIP:
When the engine is started, there may be a
slight delay before water flows from the cool-
ing water pilot hole.
ECM02251
If water is not flowing out of the cooling
water pilot hole at all times while the en-
gine 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 problem cannot be located
and corrected.
1
1. Cooling water pilot hole
54
EMU27671
Warming up engine
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.
[ECM04550]
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.
[ECM02381]
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.
EMU40461
Stop switches
Perform the following procedure to check
that the main switch and engine shut-off
switch operate properly.
Check that the engine stops when the main
switch is turned to the "
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.
" (off) position.
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