3
CHECKS AND MAINTENANCE
47
USA
CARBURETTOR
CARBURETTOR WEAR GUIDELINES
The throttle valve, the needle valve and the needle jet are subject to heavy wear
due to engine vibrations.
This can result in carburettor malfunctions (e.g. mixture enrichment).
5
4
DRAINING THE CARBURETTOR
FLOAT CHAMBER
The carburettor float chamber can be
drained by following the procedure de-
scribed below while the engine is cold.
Close the fuel cock and place tube
4
in a
container to gather the fuel that fl ows out.
Open drain screw
5
and drain the fuel.
Close the drain screw, open the fuel cock
and check the seal of the system.
WARNING
Fuel is fl ammable and toxic and must be handled with great care. Never work on
the fuel system near heat sources or open fl ames. Always allow the engine to cool
down before working on the fuel system. Wipe off any excess fuel with a rag. Materi-
als soaked in fuel are also fl ammable. In case of ingestion or contact with sensitive
parts of the body immediately seek medical attention. Fuel is to be disposed of as
prescribed by law.
