Stihl FS 94 Instruction Manual page 67

1
: Turn the lever (1) on the rotary
piston.
If the throttle lever (1) can be turned
further in the full throttle direction,
the control valve's rotary piston will
not be wide open in the full throttle
position
Adjusting the throttle cable
: Squeeze the throttle trigger and
turn the grub screw (arrow) until
the control valve's rotary piston is
wide open.
– Turn the grub screw clockwise
= throttle cable is tensioned
(rotary piston is opened more)
– Turn the grub screw
counterclockwise
= throttle cable is relaxed (rotary
piston is opened less)
66
The throttle cable must not be under
tension when the throttle trigger is
released since the control valve's
rotary piston may not close properly
– the engine idle speed will then be
too high.
Engine speed increases when
throttle trigger alone is
depressed
1
: Turn adjusting wheel (1) in
direction of "+" up to stop.
– Start the engine.
: Squeeze the throttle trigger (2) –
do not depress the throttle trigger
lockout (3).
If the engine speed increases
or if the working tool
runs, the throttle cable must be re-
adjusted.
– Shut off the engine.
: Depress the lockout lever (3),
then squeeze the throttle
trigger (2) as far as stop and hold
it there.
: Turn grub screw (2) on throttle
trigger 1/2 turn
counterclockwise.
: Release the throttle trigger (2)
and lockout lever (3).
– Start the engine and check the
adjustment, repeat procedure if
necessary.
Engine does not return to idle
speed – working tool runs in this
position
– Shut off the engine.
3
1
2
2
: Squeeze throttle trigger (1) all the
way and release it. The throttle
trigger (1) and lever (2) on the
control valve must automatically
return to their original positions.
– Check freedom of movement of
throttle cable and re-adjust if
necessary, b 6.6.2, b 6.6.3
– Check freedom of movement of
lever on control valve, replace
control valve if necessary,
b 10.4.4
– Fit the filter cover, b 10.1
– Fit the shroud, b 5.4
3
Series 4149 Powerhead