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Before starting the engine, make sure that:
- the spindle is completely retracted (see § 5).
- the accelerator control lever is completely closed (0).
11.1) Move engine "ON/OFF" switch to the "ON" position (Fig. a).
11.2) Repeatedly operate the fuel pump until fuel fl ows through the
overfl ow pipe (Fig. b).
11.3) Make sure that the accelerator lever is in position "0".
Only with a cool engine, set the 'choke lever' upwards, on the left side in
starting position (Fig. c); when engine is warm or in case of high ambient
temperature, set this lever downward in working position (Fig. f).
11.4) Pull sharply on the starting rope and then release slowly; the engine
before ignition, may require more than one operation (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, do not repeatedly pull the starting rope with
the 'choke lever' in start position. This could create a fuel excess in the cylin-
der and make ignition more diffi cult. In this case, set the lever in working
position and repeat the starting operation. Once started change the speed
of the engine twice to allow the remaining air to leave the carburettor.
11.5) Just after starting, accelerate the engine gradually before starting any
activity, then set the accelerator lever in "1" position (Fig. e) till the 'choke
lever' automatically returns, then set it again in "0" position.
11.6) Allow the engine to warm up for approximately 2 minutes then set the
accelerator lever in "1" position of maximum acceleration and start to drill.
11.7) To stop the engine move the "ON/OFF" switch to the "OFF" position.
11.8) Idling speed adjustment: if necessary, adjust the idling screw (Fig. f),
so that the engine maintains a stable idling speed (2800 rpm).
11.9) Carburetor adjustment
The carburetor has been factory previously adjusted.
The control system of the gas emissions applied to this engine consists of
a carburetor and ignition system
which guarantee the best results.
The carburetor is so adjusted to
provide the air/fuel mixture required
to achieve low consumptions and
low emissions of injurious gas.
The engine will perform
at its optimum after a
"running-in" period of
approximately 200
drilling operations.
23
11. STARTING THE ENGINE
: speed increases
: speed decreases
f)
a)
b) b)
d)
e)
c)
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