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18 Troubleshooting
Fault
Engine difficult to
start or engine power
deteriorating.
Engine overheating.
Engine running
roughly.
Heavy smoke forma‐
tion.
Excessive vibration
during operation.
Tilling performance
reduced.
Loud gearbox noise.
Drive shaft does not
rotate when clutch
lever actuated.
0478-404-9902-B
Cause
not properly fastened
to socket.
Spark plug dirty,
damaged or elec‐
trode gap incorrect.
Oil bath air filter dirty. ► Clean or replace oil bath air filter.
Engine flooded.
Carburettor iced up.
Water in fuel tank
and carburettor or
carburettor blocked.
Fuel tank contamina‐
ted.
Oil bath air filter dirty. ► Clean or replace oil bath air filter.
Spark plug dirty.
Incorrect fuel used.
Cooling ribs dirty.
Oil level in engine too
low.
Surface of engine
covered in earth.
Engine speed too
high.
Oil bath air filter dirty. ► Clean or replace oil bath air filter.
Incorrect fuel used.
Insufficient fuel in fuel
tank.
Oil level in engine too
high.
Oil bath air filter dirty. ► Clean or replace oil bath air filter.
Angle of machine
inclination over 15°.
Engine mounting
loose.
Hoes incorrectly
installed.
Hoes worn.
Blade spur incorrectly
set.
Blade spur incorrectly
set.
Drive belt worn.
Incorrect oil level in
gearbox.
Components in gear‐
box worn.
Cable defective.
Drive belt worn.
Remedy
► Clean or replace spark plug.
► Adjust electrode gap.
► Remove spark plug and dry; set main switch to 0 and
pull starter rope repeatedly with spark plug removed.
► Allow tiller to warm up to +10 °C.
► Empty fuel tank, clean fuel line and carburettor.
► Clean fuel tank.
► Clean or replace spark plug.
► Check fuel.
► Clean cooling ribs.
► Top up engine oil.
► Remove earth from engine.
► Reduce speed.
► Check fuel.
► Refill fuel tank.
► Drain engine oil.
► Place machine in horizontal working position.
► Tighten engine mounting bolts.
► Install hoes correctly.
► Replace hoes.
► Adjust blade spur.
► Adjust blade spur.
► Consult a STIHL specialist dealer.
► Check oil level in gearbox.
► Consult a STIHL specialist dealer.
► Check or replace cable.
► Consult a STIHL specialist dealer.
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