Problem
Cause
Reparation
1. Wet spark plug electrodes
Make them dry
2. Carbon deposited on the electrodes
Cleaning
3. Insulation failure by insulator damage
Exchange
4. Improper spark gap
Adjust to 0.6-0.7mm
5. Burn out of electrodes
Exchange spark plug
1. Ignition coil inside failure
Exchange
2. Damaged cable sheath or disconnected
Exchange or repair
1. Switch is OFF
Set the switch to ON
2. Switch failure
Exchange
3. Primary wiring earthed
Repair
1. Over sucking of fuel
Drain excess fuel
2. Too rich fuel
Adjust carburettor
3. Overflow
Adjust or exchange carburettor
4. Clogging of air cleaner
Wash with mixed gasoline
5. Faulty fuel
Change with proper fuel
1. Worn out cylinder, piston or piston ring
Exchange
2. Gas leakage from cylinder and
crank case gasket
Apply liquid gasket and reassemble
1. Choked breather air hole
Cleaning
2. Clogged carburetor
Cleaning
3. Clogged fuel filter
Exchange fuel filter
Problem
Cause
Reparation
1. Air penetration from fuel pipe joints etc.
Secure connection
2. Air penetration from intake tube joint or
carburettor joint
Change gasket or tighten screws
3. Water in fuel
Change with proper fuel
4. Piston starts to seize
Replace piston (and cylinder)
5. Muffler choked with carbon
Cleaning
1. Fuel too lean
Adjust carburetor
2. Clogging of cylinder fin with dust
Cleaning
3. Inferior fuel
Change with proper fuel
4. Carbon deposited in combustion chamber
Cleaning
5. Spark plug electrode red hot
Clean, adjust spark gap (0.6-0.7mm)
1. Dirty air cleaner
Wash with mixed gasoline
2. Over loading
Reduce load
WARNING:
Engine does not start
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
Others
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.
No fuel supply
Lack of power or unstable running
Compression is normal and
no misfire
Overheating
Trouble shooting
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Summary of Contents for 304003
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