Cobra Y173V - Disassembling and Servicing; Troubleshooting

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4. DISASSEMBLING AND SERVICING
4. DISASSEMBLING AND SERVICING
4-1 Troubleshooting
4-1-1 Starting Difficult
TROUBLE
CAUSE
REMEDY
Normal cylinder compression
Normal spark plug spark
Something wrong with the fuel system.
Fuel supply is not smooth or no
fuel supply.
There is no enough fuel in fuel tank and
fuel cock is closed.
Fill fuel, open fuel cock.
Air vent in the fuel filler cap is clogged
Dredge air vent.
Improper or clogged main oil flow hole.
Readjust or clean, blow to
get through.
Needle valve is not closed properly or
start hole is clogged.
Dismantle needle valve and
repair, clean, blow to get
through.
Float is damaged or sticking.
Repair float
Fuel supply is normal.
Fuel is too filthy or deteriorated
Replace
There is water in fuel.
Replace
Too much fuel in engine
Drain extra fuel, dry up spark
plug electrodes.
Wrong fuel brand
Select proper fuel brand
corresponding with the
requirements.
Normal fuel supply system.
Normal high
–tension line
spark.
Spark plug is in
bad conditions
Too much carbon deposit and dirt around
electrodes.
Clear away.
Electrodes are burn damaged seriously
or insulators damaged.
Replace spark plug.
Improper electrodes gap.
Adjust to proper value.
High-tension line
no spark
Normal spark
plug
High –tension line is damaged.
Replace
Ignition coil is damaged.
Replace
Magneto loses magnetism.
Replace
Abnormal gap between the ignition coil
and flywheel.
Adjust gap