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Specifications
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
A = 300 hours
B = 125 hours
C = 50 hours
Engine
STIHL single cylinder two-stroke engine
MS 250
Displacement:
2.77 cu. in
45.4 cc
Bore:
1.7 in (42.5 mm)
Stroke:
1.26 in (32 mm)
Engine power to
3.0 hp (2.2 kW) at
ISO 7293:
10,000 rpm
Idle speed:
2,800 rpm
Max. permissible
speed (with cutting
attachment):
14,000 rpm
Ignition System
Electronic magneto ignition
56
Spark plug (resistor
type):
Bosch WSR 6 F
Electrode gap:
0.02 in (0.5 mm)
Fuel System
All position diaphragm carburetor with
integral fuel pump
Fuel tank capacity:
15.9 fl.oz (0.47 l)
Chain Lubrication
Fully automatic, speed-controlled oil
pump with rotary piston
Oil tank capacity:
6.8 fl.oz (0.2 l)
Weight
dry, without bar and chain
MS 250:
Cutting Attachments
Recommended cutting attachments
conforming with the 45 degree
computed kickback angle requirement
of Section 5.11 of
ANSI/OPEI B175.1-2012 when used on
this model chain saw (see the chapter
on "Safety Precautions and Working
Techniques"):
Rollomatic E guide bars
Reduced kickback STIHL guide bars
(with green label)
Bar lengths:
40, 45 cm (16, 18 in.)
Pitch:
Groove width: 1.6 mm (0.063 in.)
Sprocket nose: 11-tooth
Actual cutting length will be less than
listed bar length.
Saw chain .325"
Low kickback STIHL saw chain (with
green label)
Rapid Micro 3 (26 RM3) Type 3634
Pitch:
Drive link gauge:
Chain 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
10.1 lbs
model chain saw or use saw chains
(4.6 kg)
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.
.325" (8.25 mm)
.325" (8.25 mm)
1.6 mm (0.063 in)
MS 250
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