MS 651
English
44
Engine
STIHL single cylinder two-stroke engine
Ignition System
Electronic magneto ignition
Fuel System
All position diaphragm carburetor with
integral fuel pump
Chain Lubrication
Fully automatic, speed-controlled
reciprocating oil pump. Additional
manual oil flow control
Weight
Cutting Attachment
Actual cutting length may be less than
the specified length
Rollomatic E guide bars
Rollomatic ES guide bars
Duromatic guide bars
3/8" chains
.404" chain
Chain Sprocket
Sound and vibration levels
For further details concerning
compliance with the Employers’
Directive on Vibration 2002/44/EC, see
www.stihl.com/vib
Sound pressure level L
peq
to ISO 22868
Sound power level L
w
to ISO 22868
Vibration level a
hv,eq
to ISO 22867
Chain pitch 3/8"
Specifications
Displacement: 91.1 cc
Bore: 56 mm
Stroke: 37 mm
Engine power to
ISO 7293:
5.0 kW (6.8 bhp)
at 9,500 rpm
Idle speed:
1)
1)
to ISO 11681 +/- 50 rpm
2,800 rpm
Spark plug (resistor
type):
Bosch WSR 6 F,
NGK BPMR 7 A
Electrode gap: 0.5 mm
Fuel tank capacity: 850 cc (0.85 l)
Oil tank capacity: 400 cc (0.4 l)
dry, without bar and chain
MS 651: 7.4 kg
Cutting lengths: 40, 45, 50, 63 cm
Pitch: 3/8"
Groove width: 1.6 mm
Nose sprocket: 11-tooth
Cutting lengths: 40, 50, 63, 75, 80,
90 cm
Pitch: 3/8"
Groove width: 1.6 mm
Nose sprocket: 11-tooth
Cutting lengths: 50, 63, 80, 90 cm
Pitch: 404"
Groove width: 1.6 mm
Nose sprocket: 10-tooth, 12-tooth
Cutting lengths: 40, 45, 50, 63, 75 cm
Groove width: 1.6 mm
Rapid Micro (36 RM) Type 3652
Rapid Super (36 RS) Type 3621
Pitch: 3/8" (9.32 mm)
Drive link gauge: 1.6 mm
Rapid Micro (46 RM) Type 3668
Rapid Super (46 RS) Type 3946
Pitch: .404" (10.26 mm)
Drive link gauge: 1.6 mm
7-tooth for 3/8" (rim sprocket)
Max. chain speed according
to ISO 11681: 27.5 m/s
Chain speed at maximum
power: 21.7 m/s
7-tooth for 404" (rim sprocket)
Max. chain speed according
to ISO 11681: 30.3 m/s
Chain speed at maximum
power: 23.9 m/s
107 dB(A)
120 dB(A)
Left handle: 6.9 m/s
2
Right handle: 6.9 m/s
2
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