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4-1-4 Unable igniting
4-1-5 Engine overheat
TROUBLE CAUSE REMEDY
Abnormal oil volume or inferior oil Check the oil level and quality
Exhaust pipe blocked up Clean exhaust pipe
Shroud leaking Repair damaged part
Cooling fins blocked by foreign matter Clear cooling fins
Cooling fan is loosen and misfunctioned Reinstall well
Connection rod deformation to make piston and
cylinder bushing side wear
Replace connection rod
Cylinder or piston or piston ring is worn Replace the worn parts
Improper adjustment of engine governor to cause
high speed.
Readjust engine governor
Gasoline engine
overheat
Crankshaft main bearing burnt out Replace main bearing
TROUBLE
CAUSE REMEDY
Fuel is finished Refill fuel
Carburetor is clogged Check fuel line and dredge
Float is leaking Repair
Fuel
supply
system
Needle valve is sticked
Dismantle float chamber and clean
or replace needle valve.
Spark plug is punctured, or
short-circuited by carbon deposit
Replace spark plug
Side electrode of spark plug is dropped
out
Replace spark plug
High-tension wire is dropped out Weld on
Ignition coil is punctured or
short-circuited
Replace ignition coil
Ignition
system
Stop wire is located on engine body Find out meeting and insulate
Unable
igniting
The other
Cylinder is seriously scored and valve
dropped out
Repair or replace damaged parts