-５６-
10. Troubleshooting
10-2 Engine stop during operation
Trouble
Probable Cause
Countermeasure
Suddenly stopped.
1. Switch is OFF
ON the switch.
2. Plug cap disconnect
Connect properly.
3. Switch cord or high tension cord sheath
worn out
Replace.
4. Air gap is not proper
Adjust to 0.3mm
5. Ignition coil inside failure
Replace.
6. Engine seizure
Overhaul and replace damaged parts.
7. Clogged breather
Clean.
Gradual speed
reduction and
stopped.
1. Lack of fuel
Refill.
2. Clogged carburetor
Disassemble and clean.
3. Water mixed with fuel
Drain and apply new fuel.
Revolution rises
suddenly and
stops.
1. Lack of fuel
Refill.
2. Clogged breather
Clean.
3. Clogged carburetor
Clean.
10-3 Engine cannot be stopped
Trouble
Probable Cause
Countermeasure
Overheating
1. Lean fuel
Adjust or replace carburetor.
2. Cooling passage clogged with dusts
Clean.
3. Cylinder fin clogged with dusts
Clean.
4. Improper fuel
Change with proper fuel.
5. Carbon deposited inside of combustion
chamber
Clean.
6. Spark plug electrode red hot
Clean thoroughly and adjust spark
gap to 0.6 to 0.7mm.
Ignition coil
1. Ignition coil inside failure
Replace.
Switch
1. Switch failure
Replace.
2. Cord failure
Replace.
