15
g) Troubleshooting
Please read this before something happens.
Engine does not start
Lack of power or unstable running
Problem
Cause
Reparation
No spark in the spark plug
Spark plug
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
Magneto
1. Ignition coil inside failure
Exchange
2. Damaged cable sheath or disconnected
Exchange or repair
Switch
1. Switch is OFF
Set the switch to ON
2. Switch failure
Exchange
3. Primary wiring earthed
Repair
WARNING:
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.
Spark in the spark plug
Compression and
fuelling is normal
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
Fueling normal but poor com-
pression
1. Worn out cylinder, piston or piston ring
Exchange
2. Gas leakage from cylinder and crank case gasket
Apply liquid gasket and reassemble
No fuel supply
1. Choked breather air hole
Cleaning
2. Clogged carburetor
Cleaning
3. Clogged fuel filter
Exchange fuel filter
Zündfunke ist vorhanden
Compression is normal and no
misfire
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
Overheating
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)
Others
1. Dirty air cleaner
Wash with mixed gasoline
2. Over loading
Reduce load