Stihl 038 - Notes for adjusting idle speed

38
Notes for adjusting idle speed
Engine stops while idling
Turn
idle
speed
adjusting
screw
(LA)
clockwise
until
chain
begins
to
run.
Then
back
off
one
quarter
of
a
turn.
Chain runs when engine is idling
Turn
idle
speed
adjusting
screw
(LA)
counterclockwise
until
chain
stops
running
and
then
turn
it
about
another
quarter
turn
in
the
same
direction.
Erratic idling behavior; poor acceleration
Idle
setting
too
lean;
turn
low
speed
adjusting
screw
(L)
counterclockwise
until
engine
runs
and
accelerates
smoothly.
Exhaust smokes at idle speed
Idle
speed
setting
too
rich;
turn
low
speed
adjusting
screw
(L)
clockwise
until
engine
speed
drops.
Then
turn
screw
back
one
quarter
turn
and
check
that
engine
still
accele-
rates
smoothly
when
you
open
the
throttle.
A
correction
at
the
low
speed
adjusting
screw
usually
necessitates
a
change
in
the
setting
of
the
idle
speed
adjusting
screw
(LA).
Apart
from
minor
readjustments,
you
should
leave
all
car-
buretor
setting
and
repair
work
to
your
STIHL
dealer.
STIHL
dealers
have
trained
staff
and
all
the
necessary
servicing
tools
and
equipment.