11
ENGLISH
7. STARTING THE ENGINE
7.1)
Set the engine switch to the “
I
” position (Fig.
a
).
7.2)
Repeatedly operate the fuel pump until fuel fl ows through
the overfl ow pipe (Fig.
b
).
7.3)
Set the choke lever in the position “
|/|
”;when engine is warm;
in the case of high ambient temperature, this lever may require
setting to either the open or half open position “
|ı|
” (Fig.
c
).
7.4)
Pull sharply on the starting rope and then release slowly more
than one operation may be required (Fig.
d
).
Do not over-extend the starting rope and always release it slowly
once the engine is running; a sudden release could damage the
starting system.
If the engine does not start, pull the starting rope, resetting the
choke lever in the fully open position “
|ı|
”.
7.5)
Upon starting the engine, gradually move the choke lever to
position “
|ı|
”; rev the engine at the desired speed by operating the
accelerator control lever (Fig.
e
).
7.6)
Allow the engine to warm up for approximately 2 minutes
then completely press the accelerator button and start to drill.
7.7)
To stop the engine, set the engine switch to the
“O”
position.
7.8) Idling speed adjustment:
If necessary, adjust the idling screw (Fig.
f
), so that the engine
maintains a stable idling speed (2800 rpm).
7.9) Carburettor adjustment
The carburettor has been factory set.
The system controlling the gas emissions from this engine consists
of a carburettor and ignition system to guarantee the best results.
The carburettor is adjusted to
provide the air/fuel mixture
required to achieve low con-
sumption and low emission of
injurious gas.
The engine will perform at its
optimum after a “running-in”
period of approximately 200
drilling operations.
speed increase
speed decreases
f)
e)
c)
b)
d)
I
0
a)