Operation Manual

MS 461 R
English
59
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 oil
pump with reciprocating piston –
additional manual oil flow control
Weight
dry, without bar and chain
Cutting attachment
Rescue missions
In rescue missions, use only the chains
expressly approved by STIHL for such
applications, e.g., the Rapid Duro
Rescue (36 RDR).
For rescue missions with the
aforementioned saw chain, STIHL
recommends the following guide bar:
Rollomatic "S" with sprocket nose (11-
tooth) 20 in (50 cm)
Normal cutting of wood
Recommended cutting attachments in
compliance with Sec. 5.11 of ANSI
standard B 175.1-2000
Observe the information about ANSI
standard B 175.1-2000 as well as the
definition "low-kickback saw chain" in
the section "Safety Precautions and
Working Techniques".
Rollomatic E guide bars
Rollomatic ES and Rollomatic ES light
guide bars
Saw chains 3/8"
Specifications
Displacement: 4.67 cu. in.
(76.5 cm
3)
Bore: 2.05 in. (52 mm)
Stroke: 1.42 in. (36 mm)
Engine power to
ISO 7293:
6.0 hp (4.5 kW) at
9,800 rpm
Idle speed: 2,500 rpm
Maximum permissi-
ble speed with bar
and chain: 13,000 rpm
Spark plug
(suppressed):
Bosch WSR 6 F,
NGK BPMR 7 A
Electrode gap: 0.02 in. (0.5 mm)
Fuel tank capacity: 27.1 fl.oz (0.8 l)
Oil tank capacity: 11.0 fl.oz (0.325 l)
dry, without bar and
chain 15.4 lbs. (7.0 kg)
Depth limiter (spe-
cial accessory) 2.56 lbs. (1.16 kg)
STIHL reduced kickback guide bars
(with green label)
Bar lengths: 18, 20, 25, 28, 30 in.
(45, 50, 63, 71, 75 cm)
Pitch: 3/8" (9.32 mm)
Groove width: 0.050 in. (1.3 mm) or
0.063 in. (1.6 mm)
Sprocket nose: 10-tooth for cutting
lengths 18, 20 in. (45,
50 cm)
11-tooth for cutting
lengths 25, 28, 30 in.
(63, 71, 75 cm)
STIHL reduced kickback guide bars
(with green label)
Bar lengths: 25, 28, 30, 32, 36 in.
(63, 71, 75, 80, 90 cm)
Pitch: 3/8" (9.32 mm)
Groove width: 0.050 in. (1.3 mm) or
0.063 in. (1.6 mm)
Sprocket nose: 11-tooth
STIHL reduced kickback saw chain
(with green label)
Rapid Super 3 (33 RS3) Type 3624
Pitch: 3/8" (9.32 mm)
Drive link gauge: 0.050 in. (1.3 mm)
STIHL reduced kickback saw chain
(with green label)
Rapid Super 3 (36 RS3) Type 3626
Pitch: 3/8" (9.32 mm)
Drive link gauge: 0.063 in. (1.6 mm)