Specifications; Engine; Ignition System; Fuel System - Stihl 4141 Series Manual

3

Specifications

3.1

Engine

3.2

Ignition System

3.3

Fuel System

4
STIHL single cylinder two-stroke engine
Displacement:
Bore:
Stroke:
Engine power to ISO 8893:
at 9,250 rpm
Max. permissible engine speed
without cutting tool
- without cut-off
- with cut-off in ignition module
Idle speed:
Bearings:
Piston pin diameter:
Clutch:
Clutch engages at:
Crankcase leakage test
at gauge pressure:
under vacuum:
Type:
Air gap:
Spark plug:
Electrode gap:
Carburetor:
Idle setting:
Carburetor leakage test:
at gauge pressure
Fuel tank capacity:
Octane number:
Fuel mixture:
Mix ratio:
Air filter
3
25.4 cm (1.55 cu.in)
34 mm (1.34 in)
28 mm (1.10 in)
0.9 kW (1.2 bhp)
12,900 ± 800 rpm
10,500 ± 500 rpm
3,000 rpm
Crankshaft supported in heavy-duty
deep-groove ball bearings, needle
cages on small and big ends
8 mm (0.315 in)
Centrifugal clutch with linings
4,100 ± 200 rpm
0.5 bar (7.25 psi)
0.5 bar (7.25 psi)
Transistorized magneto ignition
(breakerless) with integral
trigger unit
0.25 mm (0.010 in)
NGK CMR 7A
0.5 mm (0.020 in)
Rotary valve carburetor
Open about 6 turns
(standard setting)
0.8 bar (11.6 psi)
3
700 cm (23.7 fl.oz)
min. 90 RON (USA/CAN: pump
octane min. 87 unleaded)
Regular brand-name gasoline
and brand-name two-stroke engine
oil
50:1 with STIHL two-stroke engine
oil
Foam element and prefilter (wire
mesh)
Series 4141 Powerhead