Operating and maintenance instructions
ENGLISH 15
7.4 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.
Before opening the air filter, close the choke
to
prevent dirt entering the carburettor.
Press clip (19), tilt and remove the filter cover (8).
Clean around the filter.
Remove the assembled filter element (20) from the
filter retainer (21). Please note: Never separate
the filter element
Please note: Never separate the filter element.
Clean the filter 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.
Insert the new or cleaned filter element in
accordance with Fig. 16 into the filter retainer.
Then close the filter cover and secure it by clicking
it into position.
Never insert moist or wet filter elements!
7.5 Carburettor adjustment
The carburettor is adjusted at the factory for
optimum performance. Subject to the place of use
(mountains, low-lying areas), the average idling
speed given in the specification can be adjusted as
follows, via the idling end-stop screw "T" (the use
of a rev counter is recommended):
• If the idling speed is too high, turn the idling
end-stop screw "T" anti-clockwise.
• If the idling speed is too low (engine stops) turn
the idling end-stop screw "T" clockwise until the
engine runs smoothly.
Under no circumstances must the cutter be
driven at idle speed.
If the idling speed cannot be set correctly with the
idling end-stop screw "T", request an authorised
service centre to tune the carburettor.
The adjusting screws for the idling mixture "L"
and the full-load mixture "H" must only be
adjusted by an authorised workshop.
The following instructions are for authorised
service shops
Use the D-CUT carburettor key to adjust the idle
mixture screw "L" and the full load mixture screw
"H".
Ask the specialist workshop that is part of our
customer service about standard settings, or visit
our internet portal for dealers at www.part-and-
more.org.
Clean the air filter before adjusting the low speed
screw!
Let the engine run warm before adjusting the
engine speed.
The carburettor is tuned for optimum engine
performance. Use a rev counter to tune the
carburettor correctly!
Do not adjust the engine to a higher speed.
Excessive engine speed can lead to major engine
damage!
Fig. 17
Fig. 15
Fig. 16
To Next Page
Loading...
