Stihl FS 88 Instruction Manual - Page 40

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, ,, rH FS 88 L I@f;j I R II I i i Lj~ ~ L- LA FS 108 ( II rH FS88 I I@f;jL I! I R 117=1 I l-/~ ~ L- LA FS 108 ( II rH FS88 ( )@f;jL II R 117= I l-/@ L- --I---- FS 108 ( II Adjusting idle speed It is usually necessary to change the setting of the idle speed adjusting screw (LA or LD) after every correction to the low speed adjusting screw (L). Engine stops while idling Turn the idle speed adjusting screw (LA or LD) clockwise until engine runs smoothly - cutting tool must not rotate. Cutting tool rotates when engine is idling Turn the idle speed adjusting screw (LA or LD) counterclockwise until cutting tool stops rotating then back off screw about another one half tum from that position. Erratic idling behavior, poor acceleration Idle setting is too lean. Turn the low speed adjusting screw (L) counterclockwise until engine runs and accelerates smoothly. Exhaust smokes at idle speed Idle setting is too rich. Turn the low speed adjusting screw (L) clockwise until engine speed drops. Then turn screw back one quarter turn and ch~k that engine still acce'lerates smoothly when you open the throttle. 39

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FS 88
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Adjusting idle speed
It
is usually necessary to change
the setting of the idle speed
adjusting screw
(LA or LD)
after every
correction
to
the low speed
adjusting screw
(L).
Engine stops while idling
Turn the idle speed
adjusting screw
(LA or LD)
clockwise until engine runs
smoothly - cutting
tool must not rotate.
Cutting tool rotates when
engine is idling
Turn the idle speed adjusting
screw
(LA or LD)
counterclockwise
until cutting tool stops rotating -
then back off screw about
another one half tum from that
position.
Erratic idling behavior,
poor acceleration
Idle setting is too lean.
Turn the low speed adjusting
screw
(L)
counterclockwise until
engine runs and accelerates
smoothly.
Exhaust smokes at idle speed
Idle setting is too rich.
Turn the low speed adjusting
screw
(L)
clockwise until
engine speed drops. Then turn
screw back one quarter turn
and
ch~k
that engine still
acce'lerates smoothly when
you open the throttle.
39