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UF4L12E0.book Page 32 Thursday, June 4, 2020 2:02 PM

Control function operation

zle is changed, and the direction of the water- EJU35975
Cooling water pilot outlet
craft is changed accordingly.
When the engine is running, some of the
1 cooling water that is circulated in the engine
is discharged from the cooling water pilot
outlet.

1
2 1 Cooling water pilot outlet
There is a cooling water pilot outlet on the
port (left) side of the watercraft. To check for
proper operation of the cooling system, make
1 Handlebar
sure that water is being discharged from the
2 Jet thrust nozzle
cooling water pilot outlet. If water is not being
Since the strength of the jet thrust determines
discharged from the outlet, stop the engine
the speed and degree of a turn, throttle must
and check the jet intake for clogging. (See
always be applied when attempting a turn,
page 90 for information on the jet intake.)
except at trolling speed.
This model is equipped with the Yamaha En- TIP:
gine Management System (YEMS) that in-  It will take about 60 seconds for the water
cludes an off-throttle steering (OTS) system. to reach the outlet after the engine is start-
It will activate at planing speeds should you ed.
attempt to steer the watercraft after releasing  Water discharge may not be constant
the throttle lever. The OTS system assists in when the engine is running at idling speed.
turning by continuing to supply some thrust If this occurs, apply a little throttle to make
while the watercraft is decelerating, but you sure that water discharges properly.
can turn more sharply if you apply throttle EJU40323
Water separator
while turning the handlebars. The OTS sys- The water separator prevents water from en-
tem does not function below planing speeds tering the fuel tank by collecting any water
or when the engine is off. Once the engine that has entered the fuel tank breather hose if
slows down, the watercraft will no longer turn the watercraft was capsized.
in response to handlebar input until you apply
throttle again or you reach trolling speed.

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