Introduction - Stihl MS 290 Manual

1.

Introduction

This service manual contains
detailed descriptions of all the
typical repair and servicing
procedures for this power tool.
As the design concept of models
MS 290, MS 310 and MS 390 is
almost identical, the descriptions
and servicing procedures in this
manual generally apply to all three
models. Differences are described
in detail.
You should make use of the
illustrated parts lists while carrying
out repair work. They show the
installed positions of the individual
components and assemblies.
Refer to the latest edition of the
relevant parts list to check the part
numbers of any replacement parts.
A fault on the machine may have
several causes. To help locate the
fault, consult the chapter on
"Troubleshooting" and the "STIHL
Service Training System".
Refer to the "Technical Information"
bulletins for engineering changes
which have been introduced since
publication of this service manual.
Technical information bulletins also
supplement the parts list until an
updated edition is issued.
2
The special tools mentioned in the
descriptions are listed in chapter
"Special Servicing Tools" of this
manual. Use the part numbers to
identify the tools in the "STIHL
Special Tools" manual which lists all
the special servicing tools currently
available from STIHL.
Symbols are included in the text and
pictures for greater clarity.
The meanings are as follows:
In the descriptions:
: = Action to be taken as
shown in the illustration
(above the text)
: = Action to be taken that is
not shown in the illustration
(above the text)
In the illustrations:
Pointer (short arrow)
Direction of movement
(long arrow)
b 4.2 = Reference to another
chapter, i.e. chapter 4.2
in this example.
Service manuals and technical
information bulletins are intended
exclusively for the use of properly
equipped repair shops. They must
not be passed to third parties.
Servicing and repairs are made
considerably easier if the clamp (1)
5910 890 2000 is used to mount the
machine on assembly stand (2)
5910 890 3100 so that one clamp
screw engages the outer 10 mm
hole (3) in the assembly stand.
To service the underside of the
machine, turn it upside down and
mount it so that one clamp screw
engages the inner 10 mm hole in
the assembly stand.
Note:
Pull the hand guard back against
the front handle for this purpose.
Always use original STIHL
replacement parts.
They can be identified by the
STIHL part number,
the STIH) logo and the
STIHL parts symbol (
This symbol may appear alone on
small parts.
MS 290, MS 310, MS 390