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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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