Stihl FS 38 User Manual

FS 38
English
24
Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
General Information
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
Preparations
N Shut off the engine.
N Mounting the Cutting Attachment
N Check the air filter and clean or
replace if necessary.
N Check the spark arresting screen
(not in all models, country-specific)
in the muffler and clean or replace if
necessary.
Standard Setting
N Turn high speed screw (H)
counterclockwise as far as stop (no
more than 3/4 turn).
N Turn the low speed screw (L)
carefully clockwise until it is against
its seat, then it back it off a 3/4 turn.
Adjusting Idle Speed
N Carry out the standard setting.
N Start and warm up the engine.
Engine stops while idling
N Turn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly – the cutting
attachment must not rotate.
Engine Management Adjusting the Carburetor
L
H
LA
233BA051 KN

Stihl FS 38 Specifications

General

Type	String trimmer
Cordless	Yes
Head type	Nylon line
Handle type	D-loop handle
Engine power	0.9 hp
Product color	Black, Metallic, Orange
Uncertainty K	2 m/s²
Rotational speed	8700 RPM
Number of strokes	2
Sound power level	109 dB
Fuel tank capacity	0.33 L
Vibration emission	5.7 m/s²
Engine displacement	27.2 cm³
Sound pressure level	94 dB
Cutting diameter (max)	- mm
Power source	Gasoline

Weight and Dimensions

Length	1470 mm
Weight	4200 g