Owner's Manual

38
Specifications
Engine Spraying and Spreading Attachment
STIHL single cylinder two-stroke engine Model Airflow Air Engine
SR 320 SR 400 rate/hour velocity speed
Displacement: 44.9 cm³ 56.5 cm³
(2.74 cu.in) (3.45 cu.in) SR 320 655 m
3
/h 92 m/s 6,900 rpm
Bore: 41 mm (1.61 in) 46 mm (1.81 in) (385 cfm) (302 ft/s)
Stroke: 34 mm (1.34 in) 34 mm (1.34 in) SR 400 715 m
3
101 m/s 7,500 rpm
Engine power: 2,0 kW 2,5 kW (420 cfm) (330 ft/s)
For US only: 320 L
Bystander noise per ANSI
B 175.2 -1990 70 dB (A) Container capacity: 13 L (3.5 US gal)
Size of filler
Ignition System strainer mesh (SR): 1 mm (3/64")
Type: Electronic magneto ignition Rate of liquid
(breakerless) discharge (SR)
Spark plug (suppressed): NGK BPMR 7 A or without screen: 0.13 - 2.78 L/min (0.27 - 5.8 pt/min)
Bosch WSR 6 F with screen: 0.14 - 3.03 L/min (0.29 - 6.4 pt/min)
Heat range 200 (infinitely variable)
Electrode gap 0.5 mm (0.02 in) Quantity remaining
Spark plug thread: M 14x1.25; in container (SR): 0.1 L (3 1/2 fl. oz) (design related)
9.5 mm (0.37 in) long
Spraying range
Fuel System SR 320 SR 400
Carburetor: All position diaphragm carbu- Horizontal 10.0 m (33 ft) 12.0 m (40 ft)
retor with integral fuel pump Vertical 9.5 m (31 ft) 11.5 m (38 ft)
Air filter: Foam filter
Fuel tank capacity: 1.5 I (3.2 US pt) Dimensions
Fuel mixture: see chapter "Fuel" SR 320, SR 400
Height: 625 mm (24.6 in)
Width: 480 mm (18.9 in)
Depth: 280 mm (11.0 in)
Special Accessories
Pressure pump mounting kit, Mistblower conversion kit
Vacuum attachment, Spreading attachment
Back padding, Lap belt
Weights (dry)
SR 320/400: 10.9 kg (24.0 lb)