Stihl HS 86 Instruction Manual page 16

English
Determine the required standard
N
setting as follows: Turn the low
speed screw (L) carefully clockwise
as far as stop, then turn it
counterclockwise.
Is range of adjustment more than 1 turn?
Continue with "Standard setting A"
N
Is range of adjustment less than 1 turn?
Continue with "Standard setting B"
N
Standard setting A
Turn high speed screw (H)
N
counterclockwise as far as stop (no
more than 3/4 turn).
Turn the low speed screw (L)
N
carefully clockwise until it is against
its seat, then turn it back 1 full turn
14
Standard setting B
Turn high speed screw (H)
N
counterclockwise as far as stop (no
more than 3/4 turn).
Turn the low speed screw (L)
N
clockwise as far as stop, then turn it
back 3/4 turn.
Adjusting Idle Speed
Carry out the standard setting.
N
Start and warm up the engine.
N
Engine stops while idling
Turn the idle speed screw (LA)
N
clockwise until the cutting blades
begin to run – then back it off
2 1/2 turns.
Cutting blades run when engine is idling
Turn the idle speed screw (LA)
N
counterclockwise until the cutting
blades stop moving – then turn it
another 2 1/2 turns in the same
direction.
WARNING
If the cutting blades continue moving
when the engine is idling, have your
power tool checked and repaired by your
servicing dealer.
Erratic idling behavior, poor acceleration
(despite correction to setting of LA
screw).
Idle setting is too lean
Rotate the low speed screw (L)
N
about 1/4 turn counterclockwise
until the engine runs and
accelerates smoothly.
Engine stops when unit is swung at idle
speed
Idle setting is too rich
Rotate the low speed screw (L)
N
about 1/4 turn clockwise until the
engine idles smoothly.
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L).
Fine tuning for operation at high altitude
A slight correction of the setting may be
necessary if engine does not run
satisfactorily:
HS 86 R, HS 86 T