O-Mac MF 2500 Manual page 57

Action
CHECKING THE
CHAIN BRAKE
1. Start the machine
(par. 6.3 ):
2. Grasp the hand
grips firmly with both
hands.
3. Use the throttle
lever to keep the
chain moving, push
the front hand guard
forwards using the
back of your left
hand;(par. 5.7 ).
If any of the results fails to match the
instructions provided in the following table, do
not use the machine! Take it to an Authorised
Service Centre to be checked and repaired if
necessary.
6.3 startup
IMPORTANT A label (Fig. 2) is placed on the
machine that summarizes the start up main
steps.
The label is a quick guide and it does not
replace the procedures specified below.
Before starting the machine:
1. Place the machine firmly on the ground.
2. Remove the bar cover guard (Fig. 1.K) and
the spiked bumper guard (Fig. 1.J) (if fitted).
3. Make sure the bar and the chain are not
touching the ground or any other object.
4. Make sure the chain brake is engaged (par.
5.7).
IMPORTANT To avoid breaking the starter
cable, do not pull the whole length of it or
let it slide along the edge of the cable guide
hole. Release the starter hand grip gradually,
to prevent it flying back uncontrollably.
Result
3. The chain must
stop moving
immediately.
When the chain
has stopped,
immediately release
the throttle trigger
lever and disengage
the chain brake (par.
5.7).
IMPORTANT Never wind the starter cable
around your hand.
Never start the chainsaw by holding on to
the starter cable and allowing it to fall. This is
an extremely dangerous method as you lose
complete control over the machine and the
chain.
NOTE The switch is always in the start
position (par. 5.1).
6.3.1 Startup from cold
A "cold " start of the engine means starting
it after at least 5 minutes from when it was
switched off or after refuelling.
1. Engage the choke by turning the lever to
position «B» (Fig. 11.B).
2. Press the primer device button (Fig. 12.A) 6
times to prime the carburettor.
3. For model SP 526 only:
Press the pressure relief valve (Fig. 13.E).
NOTE Immediately after the engine starting,
the valve automatically returns to its original
position.
4. Hold the machine firmly on the ground with
your hand on the front hand grip and your foot
in the rear hand grip, to avoid losing control
during starting (Fig. 18). If the machine is not
held firmly, the force of the engine could
cause the user to lose his balance or direct
the bar towards him or an obstacle.
5. Pull the starter hand grip slowly for 10 - 15
cm until you feel some resistance, then pull it
4 times until you hear the engine start to tick
over. Engine will not start at this stage.
IMPORTANT Do not pull the starter hand grip
more than 4 times.
6. Disengage the choke (Fig. 11.A) by turning
the lever to position «A».
7. Pull the starter grip again until the engine
starts as normal.
8. When the
simultaneously activate the throttle trigger
engine has started,
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