Ordering Spare Parts; Maintenance And Repairs - Stihl MS 251 Instruction Manual

Chain sprocket
6-tooth for 3/8" (spur sprocket)
7-tooth for .325" (spur sprocket)
To comply with the 45 degree computed
kickback angle requirement of Section
5.11 of ANSI/OPEI B175.1-2012, use
replacement saw chains listed above or
elsewhere by STIHL as conforming with
that requirement when used on this
model chain saw or use saw chains
classified as "low kickback" in
accordance with
ANSI/OPEI B175.1-2012.
Since new bar/chain combinations may
be developed after publication of this
Manual, ask your STIHL dealer for the
latest STIHL recommendations.
MS 251, MS 251 C

Ordering Spare Parts

Please enter your saw model, serial
number as well as the part numbers of
the guide bar and saw chain in the
spaces provided. This will make re-
ordering simpler.
The guide bar and saw chain are subject
to normal wear and tear. When
purchasing these parts, always quote
the saw model, the part numbers and
names of the parts.
Model
Serial number
Guide bar part number
Chain part number
See "Specifications" in this manual for
the recommended reduced kickback
cutting attachments.

Maintenance and Repairs

Users of this unit should carry out only
the maintenance operations described
in this manual. STIHL recommends that
other repair work be performed only by
authorized STIHL servicing dealers.
Except for the emissions control
systems and parts, which are governed
by the Federal Emission Control
Warranty provided elsewhere in this
manual. Warranty claims following
repairs can be accepted only if the repair
has been performed by an authorized
STIHL servicing dealer using genuine
STIHL replacement parts.
Genuine STIHL parts can be identified
by the STIHL part number, the
{ logo and, in some cases, by
the STIHL parts symbol K. The
symbol may appear alone on small
parts.
For repairs of any component of this
unit's air emissions control system,
please refer to the air emissions
systems warranty in this manual.
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