33
Troubleshooting
Troubles
Causes
Remedies
1. No oil in the oil tank
1. Fill with oil
2.Switch of oil tank not opened
2. Open the switch
3. Clogged switch of oil tank
3. Clean the oil tank and its switch
4.Clogged needle valve hole of the
floating switch chamber
4. Remove to clean the carburetor
No oil can be found in the
carburetor
5. Clogged the main measuring hole
5. Remove to clean the carburetor
1. Oil dirt on the spark plug
1. Remove to clean it and dry.
2. Broken magnetic core of spark plug
or fractured electrode
2. Replace the spark plug.
3. Carbon accumulated on the spark
plug
3. Remove the carbon.
High - voltage wire
can normally ignite
but the spark plug
cannot ignite.
4.Incorrect clearance of the spark plug
4. Adjust the clearance.
1. Leakage from cylinder head gasket
or cylinder gasket
1. Tighten the screws or replace
the gasket.
2. Loosening spark plug
2. Tighten the spark plug
3. Piston ring jammed
3. Remove to clean the carbon on
the rings and grooves.
4. Excessively worn piston or piston
ring or broken piston rings
4. Replace the piston and the
piston rings.
5. Excessively worn cylinder
5. Replace the cylinder block.
6. Leakage from the air inlet pipe
6. Tighten or replace the rubber
ring.
The
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The spark plug can
normally ignite but
the
cylinder
compression is bad.
7. Damage oil seal of crankshaft
7. Replace the oil seal.
1.Excessively worn cylinder and piston
1. Replace the cylinder block and
piston.
2. Excessively worn needle bearing on
the small end and the large end of
the connecting rod
2. Replace the bearing and
relevant parts.
3. Too early ignition
3. Adjust the igniting time.
4. Excessive carbon in the combustion
chamber
4. Remove carbon on the cylinder
head.
Abnormal noise of engine
5. Overheated spark plug
5. Replace the spark plug.
1. Water or dirty in the carburetor
1. Clean the carburetor.
2. Clogged oil channel
2. Blow - off through or replace
the oil pipe.
3. Leakage from the crankcase
3. Replace the oil seal.
4. Leakage from the connecting point
between the carburetor and the
engine
4. Tighten the screws.
The engine can unstably
run.
5. Too thick or too dilute mixing gas
5. Adjust the carburetor.
1. Too long at low - speed shift
1. Shifting or control time.
2. Too heavy load or too long running
under heavy load
2. Control load and intermittently
taking a break for cooling down.
3. Too thick or too dilute mixing gas
3. Adjust the carburetor.
4. Unqualified lube oil of engine or lack
of oil in transmission box
4. Replace with qualified lube oil
and shifting
5. Slipping clutch
5. Adjust the free stroke or
replace clutch box, friction disk
and spring.
6. Too tensioned chain
6. Adjust the tension.
The
engi
ne
can
uns
teadi
ly
and
uns
m
oot
hl
y
run
Overheated engine
7. Braking device not released
7. Adjust the clearance of the
braking device.
