dink 50 125 1 Manuel atelier : Page 38

          1. GENERAL INFORMATION                                                                    DINK50/125



 POOR PERFORMANCE (ESPECIALLY AT IDLE AND LOW SPEEDS)



 Inspection/Adjustment                          Symptom                     Probable Cause


 Check ignition timing



                                                                           Faulty ignition unit
                               Correct timing         Incorrect timing
                                                                           Faulty A.C. generator


 Check carburetor pilot
 screw adjustment

                                                                           Mixture too rich (turn screw out)
                              Correctly adjusted    Incorrectly adjusted
                                                                           Mixture too lean (turn screw in)
 Check carburetor gasket
 for air leaks

                                                                           Damaged insulator rubber
                                                                           Carburetor not securely tightened
                                 No air leak              Air leaks        Faulty intake manifold gasket
 Remove spark plug and                                                     Deformed carburetor O-ring
 install it into spark plug
 cap to test spark by
 connecting it to engine
 ground
                                                                           Faulty or fouled spark plug
                                                                           Faulty ignition unit
                                                                           Faulty A.C. generator
                                 Good spark           Weak or inter-       Faulty ignition coil
                                                      mittent spark        Broken or shorted high tension
                                                                           wire
                                                                           Faulty ignition switch
 Check carburetor air
 cut-off valve



                                                                           Damaged air cut-off valve
                                    Good                   Faulty          diaphragm
                                                                           Damaged air cut-off valve spring




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