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Trouble shooting
Problem
No spark in the spark plug
Spark plug
Magneto
Switch
Spark in the spark plug
Compression and fueling is
normal
Fueling normal but poor
compression
No fuel supply
Problem
Compression is normal and
no misfire
Overheating
Others
WARNING:
Engine does not start
Cause
1. Wet spark plug electrodes
2. Carbon deposited on the elektrodes
3. Insulation failure by insulater damage
4. Inproper spark gap
5. Burn out of electrodes
1. Igniton coil inside failure
2. Damaged cable sheath or disconnected
1. Switch is OFF
2. Switch failure
3. Primery wiring earthed
1. Over sucking of fuel
2. Too rich fuel
3. Overflow
4. Clogging of air cleaner
5. Faulty fuel
1. Worn out cylinder, piston or piston ring
2. Gas leakage from cylinder and
crank case gasket
1. Choked breather air hole
2. Clogged carburetor
3. Clogged fuel filter
Lack of power or unstable running
Cause
1. Air penetration from fuel pipe joints etc.
2. Air penetration from intake tube joint or
carburetor joint
3. Water in fuel
4. Piston starts to seize
5. Muffler choked with carbon
1. Fuel too lean
2. Clogging of cylinder fin with dust
3. Inferior fuel
4. Carbon depositet in combustion chamber
5. Spark plug electrode red hot
1. Dirty air cleaner
2. Over loading
Fuell must never be poured into the waste water or anywhere else. This would
be punishable facts of the case. In the sewer there is an extreme risc of
explosion by spontanous ignition even at low temperature with damage which
cannot be forseen.
Make them dry
Cleaning
Exchange
Adjust to 0.6-0.7mm
Exchange spark plug
Exchange
Exchange or repair
Set the switch to ON
Exchange
Repair
Drain excess fuel
Adjust carburetor
Adjust or exchange carburetor
Wash with mixed gasoline
Change with proper fuel
Exchange
Apply liquid gasket and reassemble
Cleaning
Cleaning
Exchange fuel filter
Secure connection
Change gasket or thighten screws
Change with proper fuel
Replace piston (and cylinder)
Cleaning
Adjust carburetor
Cleaning
Change with proper fuel
Cleaning
Clean, adjust spark gap (0.6-0.7mm)
Wash with mixed gasoline
Reduce load
21
Reparation
Reparation
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