Stihl SR 450 - 2 Specifications; Engine; Fuel System; Ignition System

5SR 430, SR 450
2. Specifications
2.1 Engine
SR 430 SR 450
Displacement: 63.3 cm
3
63.3 cm
3
Bore: 48.0 mm 48.0 mm
Stroke: 35.0 mm 35.0 mm
Engine power to ISO 7293: 2.9 kW (3.9 bhp) 2.9 kW (3.9 bhp)
Maximum permissible engine speed
(with nozzle)
6,800 rpm 6,800 rpm
Idle speed: 3,000 rpm 3,000 rpm
Crankcase leakage test
at gauge pressure: 0.5 bar
under vacuum: 0.5 bar
2.2 Fuel System
Carburetor leakage test at
gauge pressure:
0.8 bar
Operation of tank vent at
gauge pressure: 0.5 bar
Fuel: as specified in instruction
manual
2.3 Ignition System
Air gap between ignition
module and fanwheel: 0.15...0.30 mm
Spark plug (resistor type): NGK BPMR 7 A
Bosch WSR6F
Electrode gap: 0.5 mm