14 Cleaning
14.1
Cleaning the Water Pump
► Shut off the engine.
► Allow water pump to cool down.
► Clean the water pump with a damp cloth or
STIHL resin solvent.
► Clean cooling air slots with a soft brush.
14.2
Cleaning the Suction Strainer
► Stop the engine.
► Rinse the suction strainer under running
water.
► For coarser soiling, detach lower part of suc‐
tion strainer (1) from upper part of suction
strainer (2) by turning it anti-clockwise and
remove. Rinse the inside of the suction
strainer under running water.
14.3
Cleaning the Hoses
► Shut off the engine.
► Clean the hoses with a damp cloth.
► Rinse the hoses with water.
15 Maintenance
15.1
Maintenance Intervals
Maintenance intervals are dependent on the
ambient conditions and the working conditions.
STIHL recommends the following maintenance
intervals:
Engine
► Maintain the engine as described in the engine
instruction manual.
Water pump
► Have the water pump inspected annually by a
STIHL specialist dealer.
16 Repairing
16.1
Repairing the Water Pump
The water pump cannot be repaired by the user.
► If the water pump is damaged: Do not use
your water pump and contact your STIHL
servicing dealer for assistance.
17 Troubleshooting
17.1
Remedying Water Pump Faults
Fault
Cause
Remedy
Engine cannot be
started.
Insufficient fuel in fuel
tank.
► Refuel water pump.
Carburettor overheat‐
ing.
► Allow water pump to cool down.
Carburettor iced up. ► Allow water pump to warm up.
Main switch set to
position 0.
► Press main switch.
Inferior, dirty or old
fuel in tank.
► Use fresh, good quality fuel (unleaded petrol).
► Clean carburettor.
► Clean fuel line.
Spark plug socket is
detached from spark
plug or ignition lead is
not properly fastened
to socket.
► Clean or replace spark plug.
► Check connection between ignition lead and plug.
Spark plug is dirty,
damaged or elec‐
trode gap is incorrect.
► Clean or replace spark plug.
► Adjust electrode gap.
Engine flooded.
► Remove spark plug and dry; set main switch to 0 and
pull starter rope repeatedly with spark plug removed.
Air filter dirty.
► Clean or replace air filter.
Oil level in engine too
low.
► Add engine oil.
English
14 Cleaning
12
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