Oleo-Mac BC 22 TR, Operator'S Instruction Manual, Page: 14 / 20

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fuel filling hole. Replace it (Fig. 15) if too dirty.
ENGINE
Clean cylinder fins with a brush or compressed
air periodically. Dangerous overheating of engine
may occur due to impurities on the cylinder.
SPARK PLUG
Clean spark plug and check electrode distance
periodically (Fig. 17). Use Champion NGK CMR7H
or of other brand with the same thermal grade.
Never use fuel for cleaning operations.
CARBURETOR
Before adjusting the carburetor, clean the air filter
(C, Fig. 16) and warm up the engine. This engine
is designed and manufactured in order to comply
with the applicable 97/68/EC, 2002/88/EC and
2004/26/EC Directive.
The carburetor (Fig. 14)
is designed to permit only the adjustement
of L and H screws in a range of 1/4;
the quarter
round the hall range admissible for L and H ± 1/8
screws is determined by the manufacturer and
you can not modify it.
WARNING: Don’t try to force the screws
outside the range!
Idle screw T is adjusted in order to ensure a good
safety margin between idle running and clutch
engagement.
Screw L must be adjusted so that the engine
promptly responds to sharp accelerations and
gives good idle operation.
Screw H must be adjusted so that the engine gives
maximum power during the cutting phase.
WARNING: With the engine idling (2800-
3000 rpm), the blade should not rotate. We
recommend that you have your nearest
authorised dealer or service workshop carry
out any carburettor adjustments.
NYLON LINE HEAD
Only use line of the same diameter as the original
to avoid overloading the engine (Fig. 18).
In order to get more line out of the cutting head,
tap it lightly on the ground while working.
Note:
Never hit the nylon head against hard spots
such as concrete or stones, it could be dangerous.
FITTING THE NYLON LINE HEAD (Fig.8)
Insert the upper flange (F) and washer (A). Screw
the head counterclockwise by hand. To take it
apart, put the head fixing pin into the appropriate
hole (L) and unscrew clockwise.
REPLACING THE NYLON LINE (TAP’N GO)
1. Press the tab (Fig.10) and remove the cover
and the internal spool.
2. Double back the line, leaving one end 14 cm
longer than the other one. Lock the line in the
notch (B, Fig.11). Wind the line in the direction
of the arrow, each end in its chink, regular,
without crossing them.
3. At the end of the winding, lock in the slits (Fig.12)
Assemble the spring. Slip the line through the
eyelet (Fig.13) and pull it towards the outside.
Lock the head with the cover.
WARNING! – Always wear protective
gloves during maintenance operations. Do not
carry out maintenance with the engine hot.
AIR FILTER
Every 8-10 working hours, remove the cover (A,
Fig. 16), clean the filter (C).
Clean with Emak degreaser p/n 001101009, rinse
with water and blast dry with compressed air.
Replace if dirty or damaged. The engine runs
irregularly if the filter is clogged, with consequent
higher consumption and lower performance.
FUEL TANK
Check fuel filter periodically. A dirty filter can cause
difficult starting and lower engine performance.
To clean filter proceed as follows: remove it from