Specifications; Engine; Fuel System; Ignition System - Stihl MS 261 User Manual

2.

Specifications

2.1

Engine

Displacement:
Bore:
Stroke:
Engine power to ISO 7293:
Maximum permissible engine speed
with bar and chain:
Idle speed:
Clutch:
Clutch engages at:
Crankcase leakage test
at gauge pressure:
under vacuum:
2.2

Fuel System

2.3

Ignition System

2.4

Chain Lubrication

MS 261, MS 261 C
MS 261
3
50.2 cm
44.7 mm
32.0 mm
2.8 kW (3.8 bhp)
at 9,500 rpm
14,000 rpm
2,800 rpm
Centrifugal clutch without
linings
3,600 rpm
0.5 bar
0.5 bar
Carburetor leakage test at
gauge pressure:
Operation of tank vent at
gauge pressure:
Fuel:
Air gap between ignition
module and fanwheel:
Spark plug (resistor type):
Electrode gap:
Speed-controlled oil pump with reciprocating piston and
manual flow control
Settings for oil delivery rate:
min.:
Ematic
max.:
0.8 bar
0.5 bar
as specified in instruction
manual
0.20 (+ 0.1/- 0.05) mm
NGK BPMR 7 A
BOSCH WSR6F
0.5 mm
3
4.5 (+/2.0) cm /min
at 10,000 rpm
3
8.5 (+/3.0) cm /min
at 10,000 rpm
3
11.5 (+/3.0) cm /min
at 10,000 rpm
5