4
1. SPECIFICATIONS
1.1
Engine
1.2
Fuel System
STIHL single cylinder, two-stroke engine with special impregnated
cylinder bore
Displacement:
Bore:.
Stroke:
Compression
ratio::
Max. torque:
Max.
permissable engine speed:
Mean
idle speed:
Crankshaft:
Crankshaft bearings:
Crankpin:
Big-end bearing:
Piston pin:
Small-end bearing:
Rewind starter:
Starter rope:
Clutch:
Clutch
engages at:
Crankcase
leakage test:
with overpressure::
with vacu u
m:
Carburetor:
Adjustment:
high-speed adjustment screw
H:
low-speed adjustment screw
L:
Carburetor leakage test
with overpressure:
Fuel capacity:
47 cm
3
(2
..
87 tu. in)
44
mm
(1.73 in)
31
mm
(1.22 in)
9.5:1
2
..
65
Nm
(1..95
Ibf. ft) at
6000
rpm
12000
rpm
2200
rpm
Two-part, drop-forged
2 deep-groove ball bearings
14..4
mm
(0.57 in) dia.
Needle cage
10
..
0
mm
(0
..
39 in) dia.
Needle
cage
Pawl engagement with automatic
starter rope rewind mechanism
3.5
mm
(0
..
14
in) dia.,
1060
mm
(41.8 in) long
Centrifugal
clutch without linings,
76
mm
(3
in) dia.
Approx.
3100 rpm
po
= 0
..
5 bar
(7
..
1 Ibf/in2)
pu
= 0.5 bar
(7.1
Ibflin2)
All-position
diaphragm
carburetor with
integral
fuel
pump
Open approx.
11/4
turns
Open approx
..
1114
turns
(basic setting with screws
initially
hard against their seats)
po
= 0.4 bar
(5
..
7 Ibflin2)
0.52 L
(1..1
U.S.pt)
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