Carburetor - Efco AT 900 Manuel D'utilisation Et D'entretien

WARNING! – Always wear protective
gloves during maintenance operations. Do not
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carry out maintenance with the engine hot.
Never carry out maintenance operations with
the engine running.
- Non-correct maintenance and removal of
safety devices could cause serious injuries.
- Do not use fuel mix ture for cleaning
operations.
- Do not attempt to carry out operations
or repairs that are not part of the normal
maintenance. See the authorised dealer.
AIR FILTER
The efficiency of the air intake filter on any engine
is of critical importance so it must be checked
and cleaned regularly. To clean the air filter, refer
to Fig.17A and proceed as follows:
· To reach the filter (2, Fig.1) press the clamping
button (Fig.17A) on the filter cap and turn it
following the direction of the arrow to open it.
· Remove the sponge-cloth filter.
· Clean the filter with the mixture.
· Dry the filter with compressed air or squeezing
it.
· Put the filter back and close the cap caring that
the button clamps.
CAUTION – Using the mist blower without
the air filter or with a very dirty air filter can
damage the engine and will invalidate the
warranty. Change the filter when it can no longer
be cleaned efficiently.
FUEL FILTER (Fig. 18B)
We recommend changing the fuel filter in the
fuel tank at least once a year. This operation must
be carried out by an Authorized Service Centre:
· Empty the fuel tank.
· Extract the filter and disconnect it from the
fuel hose.
· Fit a new filter in the fuel hose.
· Re-insert the filter in the fuel tank.
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CAUTION – Failure to replace the fuel filter
when it is dirty will result in impaired operation
of the engine.
ENGINE
Clean cylinder fins with a brush or compressed
air periodically. Dangerous overheating of engine
may occur due to impurities on the cylinder.
SPARK PLUG
Clean spark plug and check electrode distance
periodically (Fig. 16). Use Champion RCJ6Y or of
other brand with the same thermal grade.
FAN CASING
Following prolonged use of the mist blower a
large amount of dust may be deposited on the
fan casing (behind the cushion). This obstructs
the air flow (reduced volume) and can result in
damage to the fan and/or overheating of the
engine. For this reason, be sure to clean the fan
casing regularly. Clean the slots in the fan casing:
they play an important role in relation to engine
cooling.

CARBURETOR

The carburettor is factory adjusted to standard
settings that comply with emissions regulations.
WARNING:
- Do not change the carburettor settings
by tightening or loosening the regulator
screws; this operation must be performed
by qualified personnel at an Authorized
Service Centre.
- Incorrect adjustment of the carburettor can
cause serious damage to the engine.
- Furthermore, do not tamper with or remove
the red protective caps on the carburettor
regulator screws.
In the case of problems (engine dies when
idling, irregular engine speed or failure to reach
maximum power) seek the assistance of an
Authorized Service Centre.
WARNING: Weather conditions and
altitude may affect carburation.