MS 250 Chainsaw Manual

MS 250
English
54
EPA / CEPA
The Emission Compliance Period
referred to on the Emissions
Compliance Label indicates the number
of operating hours for which the engine
has been shown to meet Federal
emission requirements.
Category
Engine
STIHL single cylinder two-stroke engine
MS 250
Ignition System
Electronic magneto ignition
Fuel System
All position diaphragm carburetor with
integral fuel pump
Chain Lubrication
Fully automatic, speed-controlled oil
pump with rotary piston
Weight
Cutting Attachment (MS 250)
Recommended cutting attachments
complying with Section 5.11 of ANSI B
175.1-2012.
Observe notes on ANSI B 175.1-2012
and definition of "low kickback chain" in
chapter on "Safety Precautions and
Working Techniques".
Rollomatic E .325" guide bars
.325" chain
Chain Sprockets
To ensure compliance with the kickback
properties required in Section 5.11 of
ANSI/OPEI B 175.1-2012, only use
replacement chains that, when used
with this specific powerhead, comply
with Section 5.11 of the ANSI standard
or are classed as "low kickback" chains
according to ANSI/OPEI B 175.1-2012.
Please ask your STIHL dealer for the
latest recommendations on new
bar/chain combinations developed after
publication of this instruction manual.
Specifications
A = 300 hours
B = 125 hours
C = 50 hours
Displacement: 2.77 cu. in
45.4 cc
Bore: 1.7 in (42.5 mm)
Stroke: 1.26 in (32 mm)
Engine power to
ISO 7293:
3.0 hp (2.2 kW) at
10,000 rpm
Idle speed: 2,800 rpm
Max. permissible
speed (with cutting
attachment): 14,000 rpm
Spark plug (resistor
type): Bosch WSR 6 F
Electrode gap: 0.02 in (0.5 mm)
Fuel tank capacity: 15.9 fl.oz (0.47 l)
Oil tank capacity: 6.8 fl.oz (0.2 l)
dry, without bar and chain
MS 250: 10.1 lbs
(4.6 kg)
Reduced kickback STIHL guide bars
(with green label)
Cutting lengths: 16, 18 in
(40, 45 cm)
Pitch: .325" (8.25 mm)
Groove width: 0.063 in (1.6 mm)
Nose sprocket: 11-tooth
Low kickback STIHL saw chains (with
green label)
Rapid Micro 3 (26 RM3) Type 3634
Pitch: .325" (8.25 mm)
Drive link gauge: 0.063 in (1.6 mm)
7-tooth for 0.325" (spur sprocket)