Specifications; Engine; Spark Plug; Fuel System - Stihl 4180 Series Manual

3.

Specifications

3.1

Engine

Displacement:
Bore:
Stroke:
Engine power to ISO 8893
Max. permissible engine speed with cut-off
by ignition module:
Idle speed
Clutch:
Clutch engages at:
Valve clearance
Inlet valve:
Exhaust valve:
Valve diameter:
Marking:
3.2

Spark plug

Type:
Electrode gap:
Air gap between ignition module
and flywheel:
3.3

Fuel System

Crankcase leakage test
at gauge pressure:
under vacuum:
Carburetor leakage test
at gauge pressure:
Operation of tank vent
at gauge pressure:
Fuel:
Remarks:
4
FS 90
FC 90, 95
KM 90
STIHL single cylinder four-stroke engine with mixture lubrication
3
28.4 cm
38 mm
25 mm
0.95 kW
at 7,000 rpm
10,500 ± 500 rpm
2,800 rpm
Centrifugal clutch, two clutch shoes without linings
3,700 rpm
0.10 mm
0.10 mm
13.5 mm
1)
A
2)
E
BOSCH USR 7AC
0.5 mm
0.15 ... 0.30 mm
0.5 bar
0.5 bar
0.8 bar
0.3 bar
as specified in instruction manual
1)
install at inlet side only
FS 100, 110 FS 130
FC 100, 110 HT 130
HT 100, 101 HT 131
HL 100 KM 130
KM 100, 110
3
31.4 cm 36.3 cm
40 mm 43 mm
25 mm 25 mm
1.05 kW 1.4 kW
at 7,000 rpm at 8,500 rpm
10,500 ± 500 rpm 10,500 ± 500 rpm
2,800 rpm 2,800 rpm
3,700 rpm 3,700 rpm
0.10 mm 0.10 mm
0.10 mm 0.10 mm
13.5 mm 15.5 mm
1)
A B or
2)
E I
BOSCH USR 7AC NGK CMR 6H
0.5 mm 0.7 mm
0.15 ... 0.30 mm 0.15 ... 0.30 mm
0.5 bar 0.5 bar
0.5 bar 0.5 bar
0.8 bar 0.8 bar
0.3 bar 0.3 bar
2)
may be installed at inlet and
exhaust sides
Series 4180 Powerhead
3
:
1)
2)