super 9 3 Workshop-manual : Page 203

          17. EVAPORATIVE/EXHAUST EMISSION
    CONTROL SYSTEM                                                             SUPER 9       50


 EXHAUST EMISSION CONTROL SYSTEM
 The exhaust emission control system adopted by this model is an oxidizing catalytic converter
 which is located in the middle of the exhaust muffler to reduce pollutants in the exhaust
 emission.

 Exhaust Muffler Diagram




                         Catalytic Converter




 FUNCTION

       Item                    Purpose                              Function

                    Reduce the concentration of   The precious metal in the oxidizing catalytic
  Oxidizing
                    HC and CO in the exhaust      converter is used to oxidize HC and CO in
  Catalytic
                    emission.                     the exhaust emission into CO2 and H2O to
  Converter
                                                  avoid air pollution.


 TROUBLESHOOTING
                                                   Engine runs erratic at idle speed and
 Lack of power and high CO & HO                    high fuel consumption
 1. Clogged exhaust muffler                        1. Clogged exhaust muffler
 2. Faulty oxidizing catalytic converter           2. Clogged carburetor
 3. Carburetor adjusted improperly                 3. Clogged air cleaner
 4. Clogged air cleaner                            4. Faulty spark plug
 5. Faulty spark plug                              5. Incorrect ignition timing
 6. Incorrect ignition timing



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