stayer OLMO G1-250 Operating Instructions Manual page 24

7. Open the air admission completely by pushing the
'CHOKE' (21) lever until it locks in position "RUN". Do
not touch the accelerator.
8. Pull the starter handle (14) vigorously. Under normal
conditions, after some few attempts the machine will
start. Depending on the model, the first moments will
be with high revolutions, briefly passing to regular
engine speed when the machine is accelerated.
Machine drowned in gasoline
WARNING: If you have pushed the bulb (22) too many
times, or started wrongly, you may have flooded the
cylinder with gasoline.
For starting, pull the starter lever about 8 times with the
switch of the machine switched off and the lever "Choke"
pulled out and deactivated (position "RUN": completely
inserted). Thereafter, switch on the switch and pull to start.
If it does not start, this may be due to a large flooding. In this
situation, you must extract and dry up the spark plug (12)
wet with gasoline before starting. Wait a short while before
again putting in the spark plug (12) to allow the cylinder
become dry from gasoline.
Warm start
1. Activate the machine's starter switch (15).
2. Check that the mechanical brake (4) is deactivated. To
do so, check that the white-colored plastic piece in the
base is thrust in. If not so, pull the brake handle towards
yourself such that the brake (4) is deactivated.
3. Grasp the machine firmly and avoid any obstacles
being present around the machine. Comply with the
safety measure before starting.
4. Pull the starter handle (14) vigorously. Under normal
conditions, the machine will start at the first attempt.
IMPORTANT: If the fuel tank (19) has been completely
emptied due to lack of fuel, press the priming pump (22)
until gasoline appears in the primer bulb (22).
Turning the machine off
Put the circuit breaker switch (15) in position "STOP".
Checking the saw chain brake
Do not work with the chain saw without having
previously checked the saw chain brake!
Start the engine as described (make sure that the soil on
which you are stepping is stable, and place the chain saw
on the soil such that the guide bar does not touch anything).
Grasp the tubular handle (13) firmly with one hand and hold
the rear handle (1) with the other.
With the motor running at moderate speed, push the hand
guard (4) with the rear portion of your hand until actuating
the saw chain brake (4). The saw chain (5) must stop
immediately.
Immediately release the accelerator and release the saw
chain brake.
IMPORTANT: If the saw chain does not stop
immediately in this test, do not proceed with the work
under any circumstances. Contact a STAYER Service
Center.
ALERT: Do not remain a long time checking the brake (4)
risk of burning the friction system.
Adjusting the engine speed
The motor is perfectly adjusted ex works. As time goes by, it
might need small adjustments.
ENGLISH
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The engine speed increases upon rotating the adjusting
screw to the right.
Rotating to the left, the engine speed is reduced.
Mixture richness adjusting screw "H" (27) at high speed
Mixture richness adjusting screw "L" (28) at low speed
Idling adjusting screw "T" (29)
Adjusting the carburetor
- The equipment is adjusted ex works. Only proceed to
adjusting after having discarded other possible causes
such as dirty filters, exhaust pipe full of carbon deposits,
spark plug in bad condition or low-quality gasoline or
excessive or scarce mixture with oil.
- Before adjusting, fill half of the tank and let the machine
warm up keeping it running without load for 5 minutes.
Adjusting low engine speed:
WARNING: It is recommended to adjust the machine at a
technical service.
Adjust the revolutions at idling speed by means of screw T
(29).
Adjust the richness at idling speed acting on L until a
relieved speed is achieved without reaching the highest
speed limit for the previously adjusted position T.
Readjust position T if by acting on L if revolutions rise too
much. The final result will be a sound that must be clean but
not shrill but with a small roaring. Once adjusted, the
machine will start easily and will not get stalled when it is
accelerated.
Release the brake and check that the chain does not rotate
at idling speed. Never allow the saw to rotate at idling
speed. The consequence is a severe risk of accident and of
burning the mechanical brake group with fire hazard. If you
note that the saw rotates at idling speed, reduce the
revolutions until it does not move anymore and repeat the
adjusting process.
Adjusting high engine speed:
Only proceed to this after having adjusted the machine at
low revolutions. When pressing the accelerator to the
maximum, act on screw H (27) until achieving high
revolutions but without ever reaching the maximum. Once
you hear the highest revolutions (clean and sharp scarce
gasoline mixture sound), adjust to reduce the revolutions
only a little until starting to hear a stronger and more low-
pitched sound similar to roaring. Revise the low engine
speed adjustment to check that it has not changed due to
the high engine speed adjustment. The result is that the
machine revolutions will rise smoothly and quickly, that it
does not stall at idling speed and with much power and a
minimum smoke emission.
Once adjustment of the low and high engine speed has
been made, the machine is adjusted and ready to work at
maximum power, maximum lifetime of the engine and
smallest consumption.
Warning:
Carbureting a very rich mixture will make the machine
malfunction, heating up excessively, with low power and
expelling much white smoke, filling ducts with carbon
deposits and generating beads (short circuit) at the spark
plug. Moreover, the sound will be that corresponding to low
revolutions, is ugly and irregular.
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