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X. TROUBLESHOOTING
1. START ENGINE DIFFICULTLY
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.
clogged
Dredge air vent.
Fuel cock is clogged
Improper or clogged main oil
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.
Fuel supply is
normal.
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 Ignition system.
Normal spark plug
High –tension line is damaged. Replace
Ignition coil is damaged. Replace
Magneto loses magnetism. Replace
Piston ring is worn to or even
over its wear limit
Replace
Abnormal cylinder compression.
Piston ring is broken. Replace
Piston ring is sticking. Clear up carbon fouling.
Spark plug i s not installed
tighten or without a gasket.
Tighten with a gasket in.
Air leakage between cylinder
block and cylinder head.
by which cylinder block contacting with cylinder
head
Air leakage in the valves
Tighten cylinder head bolts in stipulated order to
stipulated torque.
Check valve. Clearance and tightness, repair if
necessary.
If still can’t starting, have the engine to our authorized dealer for repairing.
TROUBLESHOOTING
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