Operation Manual

Operating and maintenance information - Carburettor settings
ENGLISH 35
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8.2 Carburettor settings
The carburettor is preset to the optimum settings for the
device at the factory. Depending on the particular
location where the chainsaw is used (mountains, flat
country) it may be necessary to adjust the idling settings
via the idle stop screw "T" (24).
! The adjusting screws for the idling mixture "L" and
the full-load mixture "H" (25) must only be adjusted by
an authorised workshop.
When the idling settings are correct the engine should run smoothly at idle without the saw chain
being driven. Corrective adjustments to the average idle speed indicated in the technical data can be
made as follows via the idle stop screw "T" – ideally with the aid of a tachometer:
• If the idle speed is too high (particularly if the saw chain is already driven without the throttle being
operated), slightly open up the idle stop screw "T" by turning it anti-clockwise.
• If the idle speed is too low (i.e. the engine keeps stopping at idle), slightly close the idle stop
screw "T" by turning it clockwise until the engine runs evenly.
The saw chain must never be driven while the engine is idling.
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 following instructions are for authorised service shops
D-CUT carburettors:
• Use the D-CUT carburettor key to adjust the idle mixture screw "L" and the full load mixture screw
"H".
• Information about the standard settings can be requested from the specialist workshop of our
customer service department or downloaded from our Internet portal for specialist dealers at
www.part-and-more.org.
Carburettors with limiter caps:
• The regulating screws for idle mixture and full load mixture can only be adjusted in a limited
range.
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!