Carburetor Adjustment; Basic Setting - Stihl MS 441 Manual

1
Fitting the limiter caps
: Press new limiter caps (1) onto
the hole in the adjusting screw
until they engage the first position
(arrow) – do not push them down
fully.
If screwdriver 5910 890 2304 is not
available, the basic setting must be
made without fitting the limiter caps.
– Reassemble in the reverse
sequence.
– Make basic setting, b 14.5.1.
MS 441, MS 441 C
14.5

Carburetor adjustment

14.5.1 Basic setting

Only required if it is necessary to
replace the high speed screw H or
low speed screw L and for cleaning
or making basic settings on the
carburetor.
The basic setting must always be
made after removing the limiter
caps.
The carburetor and air filter are
installed, the adjusting screws
preset and the new limiter caps
have been fitted.
– 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.
– With the low speed and high
speed screws in their seats, turn
them one turn counterclockwise.
– Let engine warm up.
Setting washer 5910 893 6600 can
be fitted on screwdriver
5910 890 2304 to assist in making
the setting.
0 0
: Position screwdriver (1)
5910 890 2304 through the
grommet (arrow) and fitted limiter
caps on the adjusting screws.
Set idle speed with speed tester.
Set the specified speed with
a tolerance of ± 200 rpm.
1. Adjust engine speed with idle
speed screw LA to 3,300 rpm.
2. Turn low speed screw L
clockwise or counterclockwise to
obtain maximum engine speed.
If this speed is higher than
3,700 rpm, abort the procedure and
start again with step 1.
3. Use idle speed screw LA to set
engine speed to 3,300 rpm
again.
4. Set engine speed to 2,800 rpm
with the low speed screw L.
5. Set maximum engine speed of
13,500 rpm with high speed
screw H.
1
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