USER'S MANUAL
39
Troubleshooting Table of the Engine
Failures
Causes
Troubleshooting
No fuel in the
carburetor
1. No fuel in the tank.
2. The tank tap is not open.
3. The tank tap is clogged.
4. The needle-valve in the float chamber
is blocked.
5. The main jet hole is clogged.
1. Fill fuel.
2. Open the tap.
3. Clean the oil tank and tap.
4. Dismantle the carburetor and clean it.
5. Dismantle the carburetor and clean it.
High-voltage
line has normal
spark, but the
spark plugdoes
not.
1. There is oil dirt in the spark plug.
2. The magnetic core or electrode is
broken.
3. The electrode of spark plug has carbon
deposit.
4. The clearance of spark plug isnot proper.
1.Dismount and dry it.
2.Replace the spark plug.
3.Clear carbon deposit.
4. Adjust the clearance.
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The spark plug
has a normal
spark.
But the cylinder
doesn't compress
properly.
1. The pad of cylinder cover has leakage.
2. The spark plug is loose.
3. The piston ring is in the improper
position.
4. The piston and ring are excessively
worn out or the ring is broken.
5. The cylinder is seriously worn.
6. The intake pipe leaks.
7. The oil seal of crankshaft is damage
1. Tighten the screw or replace the pad.
2. Tighten the plug.
3. Clear the ring and the carbon deposit
around it.
4. Replace the piston and its ring.
5. Replace the cylinder body.
6. Tighten or replace the rubber ring.
7. Replace the oil seal.
