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Stihl SR420 Manual

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79SR 340, SR 420
español / EE.UU
EPA / CEPA:
El período de cumplimiento de emisio-
nes indicado en la etiqueta de cumpli-
miento de emisiones es la cantidad de
horas de funcionamiento para la cual la
máquina ha demostrado la conformidad
con los requerimientos de emisiones del
Gobierno federal de los EE.UU.
Categoría: A = 300 horas,
B = 125 horas, C = 50 horas
CARB:
El período de cumplimiento de emisio-
nes empleado en la etiqueta del índice
de aire CARB tiene las siguientes defini-
ciones:
Extended (extendido) = 300 horas,
Intermediate (intermedio) = 125 horas,
Moderate (moderado) = 50 horas
Sistema de combustible
Peso
SR 340
SR 420
Sistema de encendido
Accesorio pulverizador
Datos de soplador
Carburador: Carburador de
diafragma de
todas posiciones
con bomba de
combustible inte-
gral
Capacidad del tan-
que de combustible:
1,5 l (50 onzas
fl.)
Mezcla de combus-
tible:
vea el capítulo
“Combustible”
Seco
SR 340: 11,1 kg ( 24,5 lb)
SR 420: 11,1 kg (24,5 lb)
Especificaciones
Motor de un cilindro, dos tiempos
Cilindrada: 2,74 pulg cúb.
(44,9 cm
3
)
Diámetro: 41 mm (1,61
pulg)
Carrera: 34 mm (1,34
pulg)
Ralentí: 3100 rpm
Motor de un cilindro, dos tiempos
Cilindrada: 3,45 pulg cúb.
(56,5 cm
3
)
Diámetro: 46 mm (1,81
pulg)
Carrera: 34 mm (1,34
pulg)
Ralentí: 3100 rpm
Tipo: Electrónico
por magneto
electrónico
Bujía
(tipo resistencia): Bosch WSR 6 F
o
NGK BPMR 7 A;
Distancia entre
electrodos:
0,5 mm (0,02
pulg)
Capacidad del reci-
piente:
13 l (3,4 gal)
Tamaño de tamiz
colador de llenado: 1 mm (0,04 pulg)
Caudal de descarga
SR 340:
SR 420:
0,03-0,7 gal/min
(0,13-2,78 l/min)
0,04-0,8 gal/min
(0,14-3,03 l/min)
(infinitamente
variable)
Cantidad restante
en recipiente: 0,026 gal
(0,1 l)
(dependiendo del
diseño)
Velocidad del aire
SR 340: 210 mph
(94 m/s)
SR 420: 226 mph
(101 m/s)
Caudal de aire máximo son accesorio
soplador
SR 340: 689 pies
3
/min
(1170 m
3
/h)
SR 420: 742 pies
3
/min
(1260 m
3
/h)
Caudal de aire con boquilla
SR 340: 418 pies
3
/min
(710 m
3
/h)
SR 420: 441 pies
3
/min
(750 m
3
/h)
… 80 …


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