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Page 11SKU 96500
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Symptom Probable Cause Possible Remedy
Engine stops suddenly. 1. Gas tank empty.
2. Carburetor clogged
3. Floater is leaking.
4. Needle valve sticks.
5. Spark plug dirty or damaged.
6. Spark plug connector wire
damaged or disconnected.
7. Low oil auto-shutdown.
8. Ignition coil damaged.
9. Cylinder or valve damaged.
1. Fill gas tank.
2. Clean carburetor and check
fuel line.
3. Repair or replace.
4. Disassemble floater chamber
and clean.
5. Replace spark plug.
6. Check and repair spark plug
wire.
7. Fill with oil.
8. Repair or replace.
9. Disassemble, check, and
repair.
Engine Excessively Hot
Symptom Probable Cause Possible Remedy
Engine runs excessively
hot.
1. Ignition timing off.
2. Engine oil low.
3. Exhaust pipe or muffler
clogged.
4. Flow guard is leaking.
5. Cooling fan loose, damaged,
or clogged.
6. Cylinder, piston, or piston
ring is worn resulting in air flow
between cylinder and crankcase.
7. Engine speed maximum set
too high.
8. Crankshaft main bearing burnt.
1. Adjust ignition advance angle.
2. Fill with oil.
3. Clean out exhaust pipe and
muffler.
4. Repair leakage.
5. Clean, repair, or replace fan.
6. Replace damaged parts.
7. Re-adjust engine speed
governor.
8. Replace main bearing.
Abnormal Engine Noise
Symptom Probable Cause Possible Remedy
Noise of piston banging, or
other metal-on-metal
1. Piston, piston ring, or cylinder
worn.
2. Tie rod, piston pin and hole
worn.
3. Crankshaft main bearing worn.
4. Piston ring broken.
5. Carbon deposits in combustion
chamber.
6. Spark plug gap too small.
7. Using wrong gasoline.
8. Engine running too hot.
9. Incorrect valve clearance.
10. Flywheel not tightly
connected to crankshaft.
1. Replace worn parts.
2. Replace worn parts.
3. Replace main bearing.
4. Replace piston ring.
5. Clean combustion chamber.
6. Adjust electrode clearance.
7. Empty gas tank and refill with
proper gasoline.
8. See Troubleshooting
Excessively Hot Engine.
9. Readjust valve clearance.
10. Retighten flywheel.