Stihl MS 271 Manual

89MS 271 C, MS 291 C
12.6.5 Adjusting Screws
Grommet has been removed for the
sake of clarity.
There are three adjusting screws on
the carburetor:
H = high speed screw (1)
L = low speed screw (2)
LA = idle speed screw (3)
If the carburetor cannot be adjusted
properly, the problem may be the
adjusting screws.
The high speed screw H has a
limiter cap, which has to be
removed before the screw is
removed.
Always install a new limiter cap.
– Remove the carburetor, b
12.5
– See also carburetor
troubleshooting, b
3.6
Low speed screw
: Take out the low speed screw
L (1).
5902RA404 TG
3
1
2
5902RA405 TG
1
: Inspect the tip (arrow) for
damage or wear and replace the
low speed screw (L) if necessary.
– Screw down the low speed screw
(L) as far as stop.
– Continue with the high speed
screw H.
High speed screw
The high speed screw H has a
limiter cap, which has to be
removed before the screw is
removed.
: Screw the puller (1)
5910 890 4502 about 5 turns
counterclockwise into the limiter
cap
– left-hand thread.
Do not turn the puller any further
– the high speed screw (H) may
otherwise be damaged.
5902RA406 TG
1
5902RA407 TG
: Pull out the limiter cap (1).
The polymer segment is left on the
high speed screw (H) after the
limiter cap has been pulled off. It is
necessary to unscrew the high
speed screw (H) to remove the old
polymer segment.
– Take out the high speed screw
(H).
Always install a new limiter cap.
: Inspect the tip (arrow) for
damage or wear and replace the
screw (H) if necessary.
: If the high speed screw (H) is in
order, remove the old polymer
segment (1)
– take care not to damage the
high speed screw (H).
1
5902RA408 TG
1
5902RA409 TG

Stihl MS 271 Specifications

General

Motor type	2-stroke motor
Chain gauge	1.6 mm
Chain pitch	3/8 \
Blade length	400 mm
Automatic oiling	Yes
Oil tank capacity	0.24 L
Fuel tank capacity	0.5 L
Engine displacement	55.5 cm³
Engine power	3.8 hp
Power source	Gasoline

Weight and Dimensions

Weight	5600 g