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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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