Standard Setting - Stihl MS 441 Manual

: Insert a suitable punch through
the holes (arrow) and press the
limiter caps fully home.
The basic setting of the high speed
screw H and low speed screw L is
now secured.
112

14.5.2 Standard setting

The limiter caps must not be
removed when making the standard
setting.
The following steps must be taken
for all settings in order to avoid
complications:
– Troubleshooting, b 4.6.
– Check chain tension, adjust if
necessary.
– Examine spark arresting screen
(if installed), clean or replace if
necessary, b 8.1.
– Examine air filter, clean or
replace if necessary, b 14.1.
– Check air flap, clean if necessary,
b 14.4.1.
Standard setting
– Switch off engine.
– Carefully turn high speed screw
H counterclockwise up to the
stop, max. 3/4 turn.
– Carefully turn low speed screw L
clockwise up to the stop, then
back off 1/4 turn.
Set idle speed
– Let engine warm up.
– Open low speed screw L 1/4 turn.
– Turn idle speed screw LA
clockwise up to the stop or until
chain starts to rotate, then back
off 1 1/2 turns.
Erratic idling behaviour, poor
acceleration
(despite standard setting)
Idle setting too lean.
– Let engine warm up.
– Turn low speed screw L
counterclockwise until engine
runs and accelerates smoothly,
but no further than the stop.
It is usually necessary to change the
setting of the idle speed screw LA
whenever the setting of the low
speed screw L is corrected.
MS 441, MS 441 C