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español / EE.UU
BR 340, BR 340 L, BR 420, BR 420 C
En las unidades equipadas con un con-
vertidor catalítico* hay que usar exclusi-
vamente la gasolina sin plomo y el
aceite STIHL para motores de dos
tiempos o un aceite equivalente en una
mezcla de 50:1 (vea el capitulo "Com-
bustible").
El convertidor catalítico instalado en el
silenciador reduce las emisiones noci-
vas presentes en el gas de escape.
El ajuste correcto del carburados (si es
ajustable) y el uso de la mezcla especi-
ficada de gasolina y aceite para motores
de dos tiempos son esenciales para
reducir al mínimo las emisiones nocivas
de gases de escapes y asegurar una
larga vida útil del convertidor catalítico.
* vea “Guía para el uso de este
manual”
La mezcla de combustible incorrecta
(demasiado aceite de motor en la gaso-
lina), el filtro de aire sucio y condiciones
de funcionamiento desfavorables (gene-
ralmente a media aceleración, etc.)
afectan la condición de la bujía. Estos
factores causan la formación de depósi-
tos en la punta del aislador lo que puede
dificultar el funcionamiento.
Si el motor tiene poca potencia, le
cuesta arrancar o funciona deficiente-
mente a velocidad de ralentí, primero
revise la bujía.
: Saque la bujía – vea „Arranque /
parada del motor“.
: Limpie la bujía sucia.
: Mida la separación entre electrodos
de la bujía (A). Vuelva a ajustar si es
necesario. Vea “Especificaciones”.
: Use únicamente bujías de tipo
resistencia de capacidad aprobada.
Corrija la causa de la suciedad de la
bujía:
: Demasiado aceite en la mezcla de
combustible.
: Filtro de aire sucio.
: Condiciones de funcionamiento
desfavorables, por ej., funciona-
miento a media aceleración.
Coloque una bujía nueva después de
100 horas de funcionamiento, aproxi-
madamente, o más temprano si nota
que los electrodos están muy desgasta-
dos.
Convertidor catalítico* Revisión de la bujía
000BA002 KN
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  • My Stihl BR420/420C has after 15 years developed a gasoline leak. I fill tank with gasoline. Next day it’s empty. I removed tank, cleaned it up and inflated the tank with air compressor. Tank holds air without air leaks. Cleaned fuel lines. So no broken areas.
    Can someone advise me on where to look and what to replace? Submitted on 1-12-2021 at 02:11

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