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UF4D14E0.book Page 26 Tuesday, March 27, 2018 1:02 PM

Control function operation

proper operation of the cooling system, make watercraft, be sure to wipe it up with a
sure that water is being discharged from the dry cloth.
cooling water pilot outlet. If water is not being (3) Securely tighten the drain screw until it
discharged from the outlet, stop the engine stops.
and check the jet intake for clogging. (See EJU31665
Engine overheat warning system
page 70 for information on the jet intake.)
If the engine temperature rises significantly,
TIP: the engine overheat warning system will acti-
 It will take about 20 seconds for the water vate and the engine speed will be limited to
to reach the outlet after the engine is start- about 3400 r/min to help prevent damage.
ed. If the engine overheat warning system is acti-
 Water discharge may not be constant vated, immediately reduce the engine speed,
when the engine is running at idling speed. return to shore, and then make sure that wa-
If this occurs, apply a little throttle to make ter is being discharged from the cooling wa-
sure that water discharges properly. ter pilot outlet while the engine is running. If
EJU40323
Water separator there is no discharge of water, stop the en-
The water separator prevents water from en- gine, and then check the jet intake for clog-
tering the fuel tank by collecting any water ging. (See page 70 for information on the jet
that has entered the fuel tank breather hose if intake.) NOTICE: If you cannot locate and
the watercraft was capsized. correct the cause of the overheating, con-
If water has collected in the water separator, sult a Yamaha dealer. Continuing to oper-
drain it by loosening the drain screw. ate at higher speeds could result in severe
engine damage. [ECJ00042]
1

2

1 Water separator
2 Drain screw
To drain water from the water separator:
(1) Place a drain pan or dry cloth under the
water separator.
(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

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