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Control function operation
check the jet intake for clogging. (See page
70 for information on the jet intake.)
● If the cooling water passages are dry, it will
take about 20 seconds for the water to
reach the outlet after the engine is started.
● Water discharge may not be constant when
the engine is running at idling speed. If this
occurs, apply a little throttle to make sure
that water discharges properly.
The water separator prevents water from en-
tering the fuel tank by collecting any water that
has entered the fuel tank breather hose if the
watercraft was capsized.
If water has collected in the water separator,
drain it by loosening the drain screw.
To drain water from the water separator:
(1) Place a drain pan or dry cloth under the
(2) Gradually loosen the drain screw to drain
the water. Catch the draining water in the
drain pan or soak it up with the dry cloth
so that it does not spill into the engine
compartment. If any water spills into the
watercraft, be sure to wipe it up with a dry
(3) Tighten the drain screw securely.
Engine overheat warning system
If the engine temperature rises significantly,
the engine overheat warning system will acti-
vate and the engine speed will be limited to
about 3400 r/min to help prevent damage.
If the engine overheat warning system is acti-
vated, immediately reduce the engine speed,
return to shore, and then make sure that wa-
ter is being discharged from the cooling water
pilot outlet while the engine is running. If there
is no discharge of water, stop the engine, and
then check the jet intake for clogging. (See
page 70 for information on the jet intake.)
NOTICE: If you cannot locate and correct
the cause of the overheating, consult a
Yamaha dealer. Continuing to operate at
higher speeds could result in severe en-
1 Water separator
1 Drain screw
UF2F12E0.book Page 26 Tuesday, July 14, 2009 3:07 PM