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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
17-1