Regular Maintenance; Replacing Nylon Line - McCulloch CABRIO 320/34cc Manual De Propietario

L. CARBURETTOR ADJUSTMENT
A
The carburetor is adjusted for normal operation
during production. The carburetor has three
adjustment possibilities:
L: The needle screw (L) governs the fuel flow at
low speed and also the acceleration from low
to full speed.
To set low speed screw (L): close screw (L)
turning it clockwise without forcing
Then open screw 1 full turn (counterclockwise
).
If acceleration is not smooth, open another 1/8
turn to increase fuel flow .
H: The needle screw (H) governs fuel flow at high
speed (throttle valve fully open).
M. REGULAR MAINTENANCE
From time to time ensure all screws are tight.
Replace damaged, worn, cracked or warped
blades. Always make sure nylon string head or
blade have been assembled correctly (see
sections NYLON STRING HEAD and BLADE
ASSEMBLY) and blade fastener is tightened.
1) AIR FILTER CLEANING
(at least every 25 working hours).
A dust clogged air filter may cause carburetor
problems.
This may prevent the engine from reaching its
maximum speed and cause high fuel
consumption and/or difficult starting.
Remove filter cover as shown in figure 1.
Carefully clean the inside of filter box. The filter
can also be cleaned with compressed air.
2) Every 50 working hours inject the gearcase
with gear grease under high pressure through
hole (C).
3) SPARK PLUG
From time to time (at least every 50 hours)
remove and clean the spark plug and check
N. REPLACING NYLON LINE
1) Loosen the locking nut on the base of the
nylon head by turning it clockwise.
2) Remove the base cover assembly.
Remove the empty spool from the housing and
discard any remaining line.
REWINDING NEW LINE
3) Prepare 2 lengths (8ft each) of 2.4 mm nylon
line. Thread 1 end of each line into the two
holes on opposite sides of the spool. Pinch the
exposed ends flat with a pair of pliers to
prevent them slipping through the hole.
4) Wind the two lines in the same direction
around the spool.
10
To set high speed screw (H) : close screw (H)
turning it clockwise without forcing
Then open screw 1 full turn (counterclockwise
If the engine speed is too high open the screw
about 1/8 turn (counterclockwise
I: The (I IDLE) screw controls the throttle opening
.
to govern idle speed
(2,800 min
CAUTION: increased idle speed may cause blade
or nylon string head movement.
For precise adjusting contact an authorised
service station which offers the latest in toll, parts
and technical assistance.
the electrode gap (0,5/0,6 mm.). Replace
spark plug about every 100 working hours or
whenever it is extremely encrusted. Heavily
encrusted electrodes can result from an
incorrect carburetor setting or from wrong fuel
mixture (too much oil in the petrol) or a poor
quality of oil in the fuel mix. Check and correct.
4) FUEL FILTER
To change fuel filter remove the tank cap and
pull out the filter with a piece of bent wire or
long forceps. Contact your Service Station for
general servicing and cleaning of internal parts
at least once a year.This will reduce the
possibility of unexpected problems and will
ensure maximum product life and efficiency.
REGULARLY: it is important, in order to avoid
engine overheating, to remove dust and dirt
from slots, gaps and from in between cylinder
fins using a wooden scraper.
LONG STORAGE: empty fuel tank and run
engine until dry.
Store trimmer in a dry place.
REASSEMBLY
5) Slide the end of the two lines into the grooves
to hold the line temporarily.
6) Position the spool back into the housing and
pull the line through the eyelets.
7) Pull about 12cm (5ins) of line out on either side.
8) Reassemble the nylon string head as
illustrated; mower gauge,spring and locking nut
(tighten in an anti-clockwise direction).
9) N.B: In order to extend the nylon line as it
wears down, pull the mower gauge
downwards and turn it in a clockwise direction
to feed out the desired length of line.
-1 ) adjust as necessary.
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