Technical Information 08.2005 Page 11
TI_08_2005_11_01_02.fm
5. Service notes
5.1 Carburetor adjustment
With this carburetor, the high-speed adjusting
screw (H) and low-speed adjusting screw (L) can
only be adjusted by the user within a range of 270°
(3/4 turn).
The carburetor has been adjusted for optimum
performance and fuel efficiency in all operating
states.
Fine adjustments are still possible to adapt to
changed conditions of work and use such as
changes in elevation (mountains, sea-level).
5.1.1 Mechanical design
. Low-speed adjusting screw with sealing ring (1)
. Limiter cap for low-speed adjusting screw (2)
. High-speed adjusting screw with sealing ring (3)
. Limiter cap for high-speed adjusting screw (4)
. Stop (5)
. Idle speed adjusting screw (6)
The limiter caps are fitted over the knurled head of
the adjusting screws. The stop on the carburetor
housing serves as a limiter.
5.1.2 Maintenance / repair
When servicing, the limiter caps must be removed
when exchanging damaged adjusting screws or to
clean the carburetor.
. Remove limiter caps (2) with puller
5910 890 4501 (1).
Used caps may not be reused, as they are damaged
when pulled off.
Adjustment after maintenance / repair
. Check air filter and replace it if necessary.
. Check spark arresting screen (if installed) –
clean or replace if necessary.
. Check the throttle cable
270°270°
249TI004 KN
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