Specifications - Stihl MS 251 Notice D'emploi

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 251, MS 251 C
Displacement: 45.6 cm
Bore: 44 mm
Stroke: 30 mm
Engine power to 2.2 kW (3.0 HP)
ISO 7293: at 9,500 rpm
Idle speed: 2,800 rpm
High speed setting
when performing
repairs (with bar and
chain): 13,000 rpm
Ignition System
Electronic magneto ignition
MS 251, MS 251 C
Spark plug (resistor
type):
Electrode gap:
This spark ignition system meets all
requrements of the Canadian
Interference-Causing Equipment
Regulations ICES-002.
Fuel System
All position diaphragm carburetor with
integral fuel pump
Fuel tank capacity:
Chain Lubrication
Fully automatic, speed-controlled oil
pump with rotary piston
Oil tank capacity:
Weight
3
dry, without bar and chain
MS 251
MS 251 C with quick chain
adjuster and
Easy2Start:
Cutting Attachment
STIHL cutting attachments complying
with CSA Standard Z 62.3:
Rollomatic E 3/8" P guide bars
NGK CMR6H
Cutting lengths:
0.5 mm
Pitch:
Groove width:
Nose sprocket:
Rollomatic E .325" guide bars
Cutting lengths:
Pitch:
Groove width:
Nose sprocket:
0.39 L
3/8" P chain
Picco Micro 3 (63 PM3) Type 3636
Picco Super 3 (63 PS3) Type 3616
Picco Duro (63 PD3) Type 3612
Pitch:
Drive link gauge:
0.2 L
.325" saw chains
Rapid Micro (23 RM) Type 3627,
(26 RM) Type 3624
Rapid Micro 3 (23 RM3) Type 3632,
4.9 kg
(26 RM3) Type 3634
Rapid Duro 3 (23 RD3) Type 3665,
(26 RD3) Type 3667
5.2 kg
Rapid Super (23 RS) Type 3637,
(26 RS) Type 3639
Pitch:
Drive link gauge:
Chain sprockets
6-tooth for 3/8" (spur sprocket)
7-tooth for 0.325" (spur sprocket)
English
30, 35, 40, 45 cm
3/8" P (9.32 mm)
1.3 mm
9-tooth
35, 40, 45 cm
.325" (8.25 mm)
1.3 mm / 1.6 mm
11-tooth
3/8" P (9.32 mm)
1.3 mm
.325" (8.25 mm)
1.3 mm / 1.6 mm
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