O-Mac MF 2500 Manual page 58

lever (Fig. 12.B) and the interlock lever briefly
(Fig. 12.C) to cancel fast tick over. Allow the
engine to run idle for 10-15 seconds.
9. Disengage the chain brake (par. 5.7).
IMPORTANT Do not let the engine run at
high speed with the chain brake engaged, as
this could cause overheating and damage to
the clutch.
10. Let the engine run idle for at least 1 minute
before using the machine.
IMPORTANT If the starter hand grip is pulled
repeatedly with the choke engaged, it may
flood the engine and make starting difficult. "
If the engine floods (see paragraph 15.5).
6.3.2 Warm start
When hot starting (immediately after stopping
the engine):
1. Press the primer device button (Fig. 12.A) 6
times to prime the carburettor.
2. 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.
3. Engage the choke (position «B» - par.
5.2) and then immediately disengage again
(position «A» - par. 5.2); this will engage the
fast tick over.
4. Follow points 4 - 7 - 8 - 9 in the previous
procedure (par. 6.3.1).
6.4 Operation
Before felling or delimbing for the first time,
make sure:
– you have been specifically trained to use
this type of equipment;
– you have carefully read the safety
regulations and user instructions contained in
this manual;
58
– you practise first on logs on the ground or
attached to trestles, in order to get familiar
with the machine and the most suitable
cutting techniques.
To operate with the machine proceed as
described below:
• Always disengage the chain brake, before
using the throttle control.
• The machine must always be firmly held in
both hands, with the left hand on the front
hand grip and the right hand on the rear hand
grip, even if the operator is left handed. Stop
the machine immediately if the chain stops
during sawing.
6.4.1 Checks to be conducted whilst
working
6.4.1.a Checking the chain tension
The chain tends to stretch gradually as
you work, so you need to check its tension
frequently (par. 6.1.3).
6.4.1.b Checking the oil delivery
IMPORTANT Never use the machine without
lubrication! The oil tank may also be empty
every time the fuel runs out. Make sure you
top up the oil tank every time you refuel the
machine (par. 7.4). Make sure the bar and the
chain are in place when you check the oil
delivery.
Start the engine (par. 6.3), keep it running at
medium power and check if the chain oil is
delivered as shown in (Fig. 19).
You can adjust the chain oil flow using a
screwdriver on the pump adjuster screw (Fig.
20.A) which is on the bottom of the machine.
This is the symbol that identifies the oil pump
regulator: