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Trouble shooting
Problem
No spark in the spark plug
Spark plug
Magneto
Switch
Spark in the spark plug
Compression and fuelling 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 electrodes
3. Insulation failure by insulator damage
4. Improper spark gap
5. Burn out of electrodes
1. Ignition coil inside failure
2. Damaged cable sheath or disconnected
1. Switch is OFF
2. Switch failure
3. Primary 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
carburettor 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 deposited in combustion chamber Cleaning
5. Spark plug electrode red hot
1. Dirty air cleaner
2. Over loading
Fuel 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 spontaneous ignition even at low temperature with damage which
cannot be foreseen.
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 carburettor
Adjust or exchange carburettor
Wash with mixed gasoline
Change with proper fuel
Exchange
Apply liquid gasket and reassemble
Cleaning
Cleaning
Exchange fuel filter
Secure connection
Change gasket or tighten screws
Change with proper fuel
Replace piston (and cylinder)
Cleaning
Adjust carburetor
Cleaning
Change with proper fuel
Clean, adjust spark gap (0.6-0.7mm)
Wash with mixed gasoline
Reduce load
24
Reparation
Reparation
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