Stihl MS 461 Manual

5MS 461, MS 461-R
2. Specifications
2.1 Motor
MS 461, MS 461-R
Displacement: 76.5 cm
3
Bore: 52.0 mm
Stroke: 36.0 mm
Engine power to ISO 7293: 4.4 kW (6.0 HP)
at 9,800 rpm
Max. speed (with cutting attachment):
1)
13,500 rpm
1)
Idle speed: 2,500 rpm
Clutch: Centrifugal, without linings
Clutch engages at: 3,500 rpm
Crankcase leakage test
at gauge pressure: 0.5 bar
under vacuum: 0.5 bar
2.2 Fuel System
Carburetor leakage test at
gauge pressure: 0.8 bar
Operation of tank vent at
gauge pressure: 0.5 bar
Fuel: see instruction manual
2.3 Ignition System
Air gap between ignition
module and fanwheel: 0.20 (+ 0.1/- 0.05) mm
Spark plug (resistor type): BOSCH WSR 6 F
NGK BPMR 7 A
Electrode gap: 0.5 mm
2.4 Chain Lubrication
Speed-controlled oil pump with reciprocating piston and
manual flow control
Standard / Uprated
Standard
Uprated
Settings for oil delivery rate:
min.:
max.:
max.:
6.0 (+/- 2.0) cm
3
/min
at 10,000 rpm
17.0 (+/- 3.0) cm
3
/min
at 10,000 rpm
24.0 (+/- 3.0) cm
3
/min
at 10,000 rpm
1) The engine reaches its maximum RPM and maximum power after the break-in period (5 to 10 tank fillings) –
do not make any changes to the high speed screw (H) during the break-in period.

Stihl MS 461 Specifications

General

Motor type	2-stroke motor
Chain gauge	1.6 mm
Chain pitch	3/8 \
Automatic oiling	Yes
Oil tank capacity	0.325 L
Fuel tank capacity	0.8 L
Engine displacement	76.5 cm³
Engine power	6 hp
Power source	Gasoline

Weight and Dimensions

Weight	6700 g