Standard Setting; Fine Tuning - Stihl FS 38 Notice D'emploi

English

Standard Setting

: Shut off the engine.
: Mount the cutting tool.
: Check the air filter and replace if
necessary.
: Turn high speed screw (H)
counterclockwise (max.
far as stop.
: Carefully screw the low speed
screw (L) down onto its seat. Then
open it one turn counterclockwise
: Start and warm up the engine.
: Adjust idle speed with the idle speed
screw (LA) so that the cutting tool
does not rotate.

Fine Tuning

A slight correction of the setting of the
high speed screw (H) may be necessary
if engine power is not satisfactory when
operating at high altitude or at sea level.
26
Rule of thumb
Turn high speed screw (H) about
1/4 turn over for every 1000m
(3.300 ft) change in altitude.
Conditions for adjustment
Carry out adjustment with nylon line
3
/ turn) as
mowing head, making sure the
4
cutting lines are at full length (as far
as limiter blade on deflector).
: Carry out standard setting without
changing the high speed screw (H).
: Warm up engine for about
3 minutes.
: Open the throttle wide.
At high altitudes
: Turn the high speed screw (H)
clockwise (leaner) no further than
stop until there is no noticeable
increase in engine speed.
At sea level
: Turn the high speed screw (H)
counterclockwise (richer) no further
than stop until there is no noticeable
increase in engine speed.
it is possible that maximum engine
speed will already be reached with
the standard setting in each case.
Adjusting Idle Speed
It is usually necessary to change the
setting of the idle speed screw (LA)
after every correction to the low speed
screw (L).
: Warm up engine.
Engine stops while idling
: Turn idle speed screw (LA) slowly
clockwise until the engine runs
smoothly – cutting tool must not
rotate.
FS 38