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31
Ⅲ. GASOLINE ENGINE CANNOT RUN SMOOTHLY
TROUBLE
CAUSE
REMEDY
Engine is pinking
Piston, cylinder or piston ring is worn
excessively.
Replace the worn
Piston pin and piston pin hole are worn
excessively.
Replace piston or piston
pin
Tie rod small head is worn excessively.
Replace tie rod
Do.
Roller bearing for crankshaft main shaft is worn
Replace roller bearing
TROUBLE
CAUSE
REMEDY
Abnormal
combustion
Engine is too hot
Shoot trouble
Too much carbon fouling in combustion chamber
Clear away
Improper gasoline brand or low gasoline quality
Replace with qualified
gasoline
Engine cannot start
because of spark
lacking
There is water in floater room
Clean
Improper spark plug electrodes
Clearance
Adjust
Incorrect ignition time
Readjust
Something wrong with induced coil,
And so on
Check and replace
Damaged parts
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