19 TROUBLESHOOTING 75
Faults Possible cause Action
Engine has too little power Exhaust system leaky, deformed or
too little glass fiber yarn filling in
main silencer
– Check exhaust system for damage.
– Change the glass fiber yarn filling of the main
silencer. x ( p. 37)
Ignition system defective –
Check the ignition coil. x
–
Check the spark plug connector. x
Diaphragm or reed valve housing
damaged
– Check the diaphragm and reed valve housing.
Noticeable wear – Overhaul the engine.
Clutch engagement speed too low or
too high
–
Check the clutch setting. x ( p. 65)
Engine stalls or is popping into the
carburetor
Lack of fuel – Turn the knurled screw on the fuel tap all the
way counterclockwise.
– Fill up with fuel. ( p. 19)
Engine takes in bad air – Check the intake flange and carburetor for
tightness.
The connector or ignition coil is loose
or oxidized
– Clean the plug-in connection and treat it with
contact spray.
Engine overheats Too little coolant in cooling system – Check the cooling system for leakage.
– Check the coolant level. ( p. 60)
Too little air stream – Switch off engine when standing.
Radiator fins very dirty – Clean radiator fins.
Foam formation in cooling system –
Drain the coolant. x ( p. 60)
–
Refill the coolant. x ( p. 61)
Damaged cylinder head or cylinder
head gasket
– Check the cylinder head or cylinder head gas-
ket.
Bent radiator hose –
Change the radiator hose. x
White smoke emission (steam in
exhaust gas)
Damaged cylinder head or cylinder
head gasket
– Check the cylinder head or cylinder head gas-
ket.
Gear oil exits at the vent hose Too much gear oil added – Check the gear oil level. ( p. 69)
Water in the gear oil Damaged shaft seal ring or water
pump
– Check the shaft seal ring and water pump.
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