Adjusting The Carburetor; Spark Arresting Screen In Muffler - Stihl MS 170 Manual De Instrucciones

Adjusting the Carburetor

Your carburetor is preset at the factory to
provide an optimum fuel-air mixture
under most operating conditions.
Adjusting idle speed
: Check the air filter and replace if
necessary.
: Check the spark arresting screen
and clean or replace as necessary.
MS 170, MS 180, MS 180 C
: Carefully screw the idle speed
screw (LD) down onto its seat
counterclockwise (left-hand thread).
Then open it two full turns clockwise
(standard setting LD = 2).
: Start and warm up the engine.
: Use the idle speed screw (LD) to
adjust idle speed correctly:
The chain must not rotate.
Engine idle speed too low:
: Turn the idle speed screw (LD)
slowly clockwise until the chain
begins to run – then back off the
screw half a turn.
Chain runs when engine is idling:
: Turn the idle speed screw (LD)
slowly counterclockwise until the
chain stops running – then turn the
screw about another half turn in the
same direction.
:
If the chain continues moving when
the engine is idling, have your saw
checked and repaired by your
servicing dealer.
English / USA
Spark Arresting Screen*
in Muffler
1
1
3
4
If the engine is low on power, check the
spark arresting screen* in the muffler.
: Take out the screws (1) and remove
the cover (2).
: Remove the spark arresting
screen (3) from the muffler (4).
: Clean the spark arresting screen
if necessary.
: If screen is damaged or coked up,
fit a new one.
: Refit the spark arresting screen,
place the cover in position and
secure with the screws.
* see "Guide to Using this Manual"
2
43