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PETROL CHAIN SAW FOR TREE SERVICE USER MANUAL
Fig. 38
8.11 FUEL MIX ADJUSTMENT
ENGINE "IDLE" SPEED ADJUSTMENT
SCREW [T]
- The fuel of your chain saw has been factory
set on standard values (fig.21).
- The screw [T]: keeps the butterfly valve in a
slightly open position in order to adjust the en-
gine "IDLE " speed at the correct rotation speed.
WARNING DANGER!! A high "idle"
speed adjustment can cause the
operation of the centrifugal clutch and
therefore operate the cutting chain even if
the throttle lever is released.
- The engine idle speed is increased by turning
the screw clockwise.
- See the technical data table (page 23).
- Screw [L]: adjusts the carburation for the idle
speed and acceleration.
- Screw [H]: adjusts the carburation for the high
operating speed.
As the adjustment operation requires
a technical background as well as spe-
cial technical equipment, please contact an AP-
PROVED SERVICE CENTRE.
40
SAFETY LINK
9. SCHEDULED MAINTENANCE
DANGER!! Do not carry out any
checking, maintenance and repair
operations with the engine running.
9.1 CHAIN
See paragraph "8.10 CHAIN"
9.2 GUIDE BAR
- Periodically clean the chain sliding groove and
the oil ports.
- Lubricate the pinion with bearing grease.
- Turn the guide bar upside down (with any main-
tenance operation) to ensure a consistent wear
and tear.
9.3 AIR FILTER
A blocked air filter reduces the engine perform-
ance, the cutting efficiency, and increases fuel
consumption.
- Cutting dry wood and working in a dusty envi-
ronment require the filter to be cleaned more
often.
a) Remove the filter cover (fig. 22) by unscrew-
ing the knob.
- Lift the filter (fig.23).
- Separate the two halves (fig.24) by using a
screwdriver (if required).
- Blow with compressed air from the inside to
the outside.
b) Replace the filter if damaged (warped and/or
split).
9.4 FUEL FILTER
Can be removed (through the refuelling hole fig.1
item 13) by using a hook and by holding it with
long nose pliers.
Replace the filter at least once a year.
- Use a genuine filter.
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