super 8 50 2t 1 Workshop-manual : Page 27

          2. GENERAL INFORMATION                                                     SUPER8 50 2T



 ENGINE LACKS POWER

 Inspection/Adjustment                   Symptom                    Probable Cause

 Start engine and
 accelerate lightly for
 observation.
                                                                    Clogged air cleaner
                             Engine speed       Engine speed        Clogged fuel filter
                             increases          does not increase   Clogged exhaust muffler
                                                sufficiently        Faulty auto bystarter
                                                                    Faulty charcoal canister
 Check ignition timing
 (using a timing light).

                                                                    Faulty CDI unit
                            Correct timing       Incorrect timing   Faulty A.C. generator
 Test cylinder
 compression (using a
 compression gauge)
                                                                    Worn cylinder and piston
                              Normal               Abnormal         rings
                              compression          compression      Blown cylinder head gasket
                                                                    Faulty reed valve
 Check carburetor for
 clogging


                             Not Clogged            Clogged         Clogged carburetor jets


 Remove spark plug
 and
 i   t

                           Plug not fouled or    Plug fouled or     Fouled spark plug
                           discolored            discolored         Incorrect heat range plug

 Check if engine
 overheats
                                                                    Mixture too lean
                                                                    Poor quality fuel
                           Engine does not           Engine         Excessive carbon build-up
                             overheats              overheats       in combustion chamber
                                                                    Ignition timing too early
 Rapidly accelerate or
 run at high speed
                                                                    Excessive carbon build-up
                           Engine does not                          in combustion chamber
                                                 Engine knocks      Poor quality fuel
                            knock
                                                                    Clutch slipping
                                                                    Mixture too lean



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