Operation Manual

44
English / USA
HT 250
EPA:
The Emission Compliance Period
referred to on the Emissions
Compliance Label indicates the number
of operating hours for which the engine
has been shown to meet Federal
emission requirements. Category
A = 300 hours
B = 125 hours
C = 50 hours
CARB:
The Emission Compliance Period used
on the CARB Air Index Label indicates
the terms:
Extended = 300 hours,
Intermediate = 125 hours,
Moderate = 50 hours
STIHL single cylinder four-stroke
engine with gasoil lubrication
Fuel tank capacity
21.6 oz. (640 cm
3
)
Spark plug (resistor type)
Bosch WSR 6F, NGK BPMR 7 A
Electrode gap 0.02 in (0.5 mm)
Rewind starter
Starter rope: 0.12 in dia., 33.5 in long
(3.5 mm dia., 850 mm long)
Weight
(without cutting attachment, tank dry)
13.4 lbs (6.1 kg)
Cutting attachment
Guide bar
Rollomatic with sprocket nose
Length: 14“ (35 cm)
Oilomatic chain
Picco-Micro-Mini
Pitch: 3/8"P (9.32 mm)
Drive link gauge: 0.043 in (1.1 mm)
Chain sprockets
Spur sprocket
Pitch: 3/8" P (9.32 mm)
No. of teeth: 6, 7 (option)
Chain lubrication
Fully automatic speed-controlled rotary
piston pump
Oil tank capacity: 7.4 fl.oz (220 cm
3
)
Displacement: 2.45 cu.in
(40.2 cm
3
)
Bore: 1.57 in (40 mm)
Stroke: 1.26 in (32 mm)
Power to
ISO 8893: 2.1 bhp (1.6 kW)
at 9,000 rpm
Specifications
Idle speed: 2,800 rpm
Max. output shaft
speed
(chain sprocket): 12,300 rpm
Engine cut-off
speed: 12,300 rpm