RedMax 967683802, Руководство по ремонту

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30 – English
Caburettor
12.1 Carburettor
12.1.1 Description
The drawings accompanying this description do not
correspond with the carburettor on the chainsaw.
They only show the principle for the design and
function.
Design
The carburettor is based on three sub-systems:
• The metering unit, A in fig. 1.
• The mixing venturi, B in fig. 2.
• The pump unit, C in fig. 3.
The jets and the fuel’s control functions are located
in the metering unit (A). Here the correct quantity
of fuel is adjusted for the actual speed and power
output.
The mixing venturi (B) houses the choke, throttle
valve and diffuser jets. Here air is mixed with the
fuel to give a fuel/air mixture that can be ignited by
the ignition spark.
In the pump unit (C), fuel is pumped from the fuel
tank to the metering unit. One side of the pump dia-
phragm is connected to the crankcase and pulses
in time with the pressure changes in the crankcase.
The other side of the diaphragm pumps the fuel.
12 Carburettor
WARNING!
The fuel used in the chainsaw has
then following hazardous
properties:
1. The fluid and its fumes are
poisonous.
2. Can cause skin irritation.
3. Is highly inflammable.
B 2 . g i F
C 3 . g i F
A 1 . g i F