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    UF4P11E0.book  Page 101  Friday, October 30, 2020  9:39 AM

                                                                           Trouble recovery

                                 TROUBLE            POSSIBLE CAUSE             REMEDY         PAGE
                             Engine runs irregu-  Fuel   Fuel tank empty  Refill as soon as pos-  61
                             larly or stalls                              sible
                                                         Stale or contaminat-  Have serviced by   —
                                                         ed               Yamaha dealer
                                                         Incorrect octane   Use correct fuel   61
                                                         number
                                              Fuel tank  Water or dirt present  Have serviced by   —
                                                                          Yamaha dealer
                                              Spark plug  Fouled or defective  Have serviced by   —
                                                                          Yamaha dealer
                                                         Incorrect heat range  Have serviced by   —
                                                                          Yamaha dealer
                                                         Gap incorrect    Have serviced by     —
                                                                          Yamaha dealer
                                              Electrical wir-  Loose connection  Have serviced by   —
                                              ing                         Yamaha dealer
                                              Fuel injec-  Faulty or clogged in-  Have serviced by   —
                                              tion system  jectors        Yamaha dealer
                             Warning is dis-  Fuel level   Fuel tank empty  Refill as soon as pos-  61
                             played           warning                     sible
                                              Oil pressure   Oil pressure dropped  Have serviced by   52
                                              warning                     Yamaha dealer
                                              Engine over-  Jet intake clogged  Clean         103
                                              heat warning
                                              Check en-  Faulty sensors   Have serviced by     51
                                              gine warning                Yamaha dealer

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