Stihl MS 391 Instruction Manual

MS 311, MS 391
English
58
Where to make a Claim for Warranty
Service
Bring the product to any authorized
STIHL servicing dealer and present the
signed warranty card.
Maintenance Requirements
The maintenance instructions in this
manual are based on the application of
the recommended 2-stroke fuel-oil
mixture (see also instruction "Fuel").
Deviations from this recommendation
regarding quality and mixing ratio of fuel
and oil may require shorter maintenance
intervals.
Limitations
This Emission Control Systems
Warranty shall not cover any of the
following:
N repair or replacement required
because of misuse, neglect or lack
of required maintenance,
N repairs improperly performed or
replacements not conforming to
STIHL Incorporated specifications
that adversely affect performance
and/or durability, and alterations or
modifications not recommended or
approved in writing by STIHL
Incorporated,
and
N replacement of parts and other
services and adjustments
necessary for required maintenance
at and after the first scheduled
replacement point.
STIHL Registered Trademarks
STIHL
®
{
K
The color combination orange-grey
(U.S. Registrations #2,821,860;
#3,010,057, #3,010,058, #3,400,477;
and #3,400,476)
AutoCut
®
EASYSTART
®
FARM BOSS
®
iCademy
®
MAGNUM
®
MasterWrench Service
®
MotoMix
®
OILOMATIC
®
Rock Boss
®
STIHL Cutquik
®
STIHL DUROMATIC
®
STIHL Quickstop
®
STIHL ROLLOMATIC
®
STIHL WOOD BOSS
®
TIMBERSPORTS
®
WOOD BOSS
®
YARD BOSS
®
Some of STIHL’s Common Law
Trademarks
4-MIX ™
BioPlus ™
Easy2Start ™
EasySpool ™
ElastoStart ™
Ematic ™
FixCut ™
HT Plus ™
IntelliCarb ™
Master Control Lever ™
Micro ™
Pro Mark ™
Trademarks
TM
STIHL
Injection

Stihl MS 391 Specifications

General

Motor type	2-stroke motor
Chain gauge	1.6 mm
Chain pitch	3/8 \
Automatic oiling	Yes
Oil tank capacity	0.35 L
Fuel tank capacity	0.6 L
Engine displacement	64.1 cm³
Engine power	4.4 hp
Power source	Gasoline

Weight and Dimensions

Weight	6200 g