Operating and Maintenance Instructions
ENGLISH 18
10.5 Air Filter Maintenance
Dirty air filters cause a reduction in engine
performance and increase fuel consumption
with more pollutants in the exhaust gas.
Engines are less likely to start readily with a dirty
and soiled air filter.
The following maintenance jobs should be
carried out frequently.
Press clip (27), tilt and remove the filter cover
(28). Clean around the filter.
Remove the pre-filter (29) and the main filter
(30) from the filter body (31).
If the machine is used all day both pre-filter and
main filter should be cleaned daily. Clean the
filters more often in extreme dust conditions.
For daily cleaning jobs simply tap the filters
against a hard object or use compressed air.
Damaged air filters should be replaced
immediately. Warranty does not apply to engine
damage caused by the lack of or improper
maintenance.
Refit the new or cleaned pre-filter and main
filter in the filter body (31), re-install the filter
cover and secure with the clip.
Never install a damp or wet pre-filter or main
filter!
10.6 Information about the spark plug
Do not turn the engine over while the spark
plug has been removed or the spark plug cap
has been disconnected from the high tension
ignition cable. A spark may cause fire!
Check the spark plug regularly after 50 hours of
operation.
• Remove the spark plug cover.
• Disconnect the spark plug cap.
• Unscrew the spark plug and dry the electrodes
The spark plug should be replaced after 100
hours of operation or if the electrodes are badly
worn.
Spark plugs with resistor (thermal value 200) are
available in different brands under the
following description:
BOSCH WS6F
CHAMPION RCJ-6Y oder vergleichbar.
The correct electrode gap is 0.5 mm.
Only use spark plugs with a firm, fitted
connecting nut towards the plug cap. Loose
connectors may produce sparks which can cause
a fire.
• Screw spark plug into cylinder and tighten.
• Place spark plug cap firmly over the spark
plug
• Refit spark plug cover.
Before re-starting the engine, check the high
tension ignition cable for any damage to the
insulation and ensure the cable is connected
securely to the plug cap.
10.7 Hints concerning the exhaust
system
Ensure the exhaust is in good order and
condition before operating the machine. Never
touch the exhaust while it is still hot.
Unsatisfactory engine performance, despite a
clean air filter and a correctly adjusted
carburettor, may well be due to a partially
blocked or damaged exhaust. Please consult
your specialist service centre.
Fig. 15
Fig. 16
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