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Stihl MH 700 Notice D'emploi page 49

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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.
0478-404-9604-B
Cause
Main switch set to 0
position.
Inferior, dirty or old
fuel in tank.
Spark plug socket
detached from spark
plug or ignition lead
not properly fastened
to socket.
Spark plug dirty,
damaged or elect‐
rode 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 inc‐
lination over 15°.
Engine mounting
loose.
Hoes incorrectly
installed.
Hoes worn.
Blade spur incorrectly
set.
Blade spur incorrectly
set.
Drive belt worn.
Remedy
► Press main switch.
► Use fresh, good quality unleaded petrol.
► Clean carburettor.
► Clean fuel line.
► Connect spark plug socket.
► Check connection between ignition lead and plug.
► 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.
English
49

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