people 125 Manuel atelier : Page 18

          1. GENERAL INFORMATION                                                        PEOPLE 125/150
 TROUBLESHOOTING
 ENGINE WILL NOT START OR IS HARD TO START


 Inspection/Adjustment                        Symptom                   Probable Cause

 Check if fuel reaches
 carburetor by loosening
 drain screw                                                          Empty fuel tank
                                                                      Clogged fuel line between fuel
                                                                      tank and carburetor
                                                   Fuel does not      Clogged float oil passage
                                Fuel reaches                          Clogged fuel tank cap breather
                                carburetor         reach carburetor   hole
                                                                      Clogged fuel filter
                                                                      Clogged fuel strainer
                                                                      Faulty auto fuel valve
 Remove spark plug and
 install it into spark plug
 cap to test spark by                                                 Faulty charging system
 connecting it to engine                                              Faulty spark plug
 ground                                                               Fouled spark plug
                                                                      Faulty CDI unit
                               Spark jumps        Weak or no spark    Faulty pulser coil
                                                                      Broken or shorted ignition coil
                                                                      Broken or shorted exciter coil
                                                                      Faulty ignition switch
                                                                      Weak or dead battery
 Test cylinder
 compression
                                                                      Faulty starter clutch
                                                                      Valve clearance too small
                                                                      Improper valve and seat contact
                                Normal                  Low or no     Worn cylinder, piston and piston
                                compression             compression   rings
                                                                      Leaking cylinder head gasket
                                                                      Seized valve
                                                                      Improper valve timing
 Start engine by
 follow-ing normal
 starting procedure
                                                                      Faulty auto bystarter
                              Engine does not      Engine fires but   Air leaking through intake pipe
                              fire                 does not start     Incorrect ignition timing
                                                                      Incorrectly adjusted pilot screw


 Remove spark plug and
 inspect again

                                                                      Flooded carburetor
                               Dry spark plug       Wet spark plug    Faulty auto bystarter
                                                                      Throttle valve excessively open




1-18