4 Series 4144 Powerhead
3. Specifications
3.1 Engine
FS 40 FS 50, 56, FC 56, KM 56
Displacement: 27.2 cm
3
27.2 cm
3
Bore: 34 mm 34 mm
Stroke: 30 mm 30 mm
Engine power to ISO 8893: 0.7 kW (1.0 bhp)
at 8,500 rpm
0.8 kW (1.1 bhp)
at 8,500 rpm
Max. permissible speed
(with cutting attachment): 10,000 rpm 10,000 rpm
Idle speed: 2,800 rpm 2,800 rpm
Clutch: Centrifugal clutch without
linings
Centrifugal clutch without
linings
Clutch engages at: 4,200 rpm 4,200 rpm
Crankcase leakage test
at gauge pressure: 0.5 bar
under vacuum: 0.5 bar
3.2 Ignition System
Air gap between the ignition
module and flywheel: 0.30 mm
Spark plug (suppressed): NGK CMR 6 H
NGK 6 H
Electrode gap: 0.5 mm
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