agility 50 2 Workshop-manual : Page 22

          1. GENERAL INFORMATION                                                           AGILITY 50

 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
 Remove spark plug and                                                 Faulty auto fuel valve
 install it into spark plug
 cap to test spark by
 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 high-tension
                                                                       wire
                                                                       Faulty ignition switch
 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




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