Specifications; Engine; Fuel System - Stihl 034 Series User Manual

3

Specifications

3.1

Engine

STIHL single cylinder two-stroke engine with special impregnated cylinder bore
Displacement:
Bore:
Stroke:
Compression ratio:
Engine power to ISO 8893:
Max. torque:
Max. permissible engine speed with
bar and chain:
Mean idle speed:
Crankshaft:
Main bearings:
Crankshaft journal diameter:
Big end bearing:
Piston pin diameter:
Small end bearing:
Connecting rod length:
Rewind starter:
Starter rope:
Clutch:
Diameter:
Clutch engages at:
Crankcase leakage test
at gauge pressure:
under vacuum:
3.2

Fuel System

4
034
3
56.5 cm
46 mm
34 mm
9.5:1
3.0 kW (4.1 bhp)
at 9,500 rpm
3.5 Nm
at 6,500 rpm
13,000 rpm
2,700 rpm
Two-part, drop forged
Two deep-groove ball bearings
14.4 mm
Needle cage
10 mm
Needle cage
58 mm
Pawl engagement with automatic
starter rope rewind mechanism
3.5 mm dia., 960 mm
Centrifugal clutch without linings
76 mm
approx. 3,500 rpm
0.5 bar
0.5 bar
Carburetor:
Standard setting
High speed screw H:
Low speed screw L:
Idle setting:
Carburetor leakage test
at gauge pressure:
Fuel tank capacity:
Fuel mixture:
Mix ratio:
Air filter:
036, 036 QS
3
61.5 cm
48 mm
34 mm
9.5:1
3.4 kW (4.6 bhp)
at 9,500 rpm
3.7 Nm
at 6,500 rpm
13,000 rpm
2,700 rpm
Two-part, drop forged
Two deep-groove ball bearings
14.4 mm
Needle cage
10 mm
Needle cage
58 mm
Pawl engagement with automatic
starter rope rewind mechanism
3.5 mm dia., 960 mm
Centrifugal clutch without linings
76 mm
approx. 3,500 rpm
0.5 bar
0.5 bar
034, 036, 036 QS
All positon diaphragm carburetor
with integral fuel pump
approx. 1 turn open
approx. 1 turn open
(starting with screws firmly against
their seats)
0.4 bar
3
625 cm
Regular brand-name gasoline and
brand-name two-stroke engine oil
50:1 with STIHL two-stroke engine
oil
25:1 with other brand-name two-
stroke, air-cooled engine oils
Large area, bisectional box filter
with wire mesh
034, 036, 036 QS