KYMCO ZX/SCOUT 50 Service Manual page 187

17
. EVAPORATIVE/EXHAUST EMISSION
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
FUNCTION
Item
Oxidizing
Catalytic
Converter
TROUBLESHOOTING
Lack of power and high CO & HO
1. Clogged exhaust muffler
2. Faulty oxidizing catalytic converter
3. Carburetor adjusted improperly
4. Clogged air cleaner
5. Faulty spark plug
6. Incorrect ignition timing
17-1
CONTROL SYSTEM
Catalytic Converter
Purpose
Reduce the concentration of
HC and CO in the exhaust
emission.
Function
The precious metal in the oxidizing catalytic
converter is used to oxidize HC and CO in
the exhaust emission into CO
avoid air pollution.
Engine runs erratic at idle speed and
high fuel consumption
1. Clogged exhaust muffler
2. Clogged carburetor
3. Clogged air cleaner
4. Faulty spark plug
5. Incorrect ignition timing
ZX / SCOUT
and H O to
2 2