Adjusting the Carburetor
General Information
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
With this carburetor it is only possible to
adjust the engine idle speed within fine
limits.
MS 880
Standard Setting
:
Shut off the engine.
:
Check the air filter and clean or
replace if necessary.
:
Check spark arresting screen in the
muffler and clean or replace it as
necessary.
:
Turn the high speed screw (H)
counterclockwise (max.
far as stop.
Turn low speed screw (L) clockwise as
far as stop. Then back it off one quarter
turn.
*
See ²Guide to Using this Manual³
Adjusting Idle Speed
Engine stops while idling
:
open low speed screw (L) one
quarter turn
:
Turn the idle speed screw (LA)
clockwise until chain begins to run –
then back it off one quarter of a turn.
1
Chain runs when engine is idling
/
turn) as
2
:
open low speed screw (L) one
quarter turn
:
Turn the idle speed screw (LA)
counterclockwise until chain stops
running – then turn screw another
quarter turn in the same direction.
English / USA
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