I. Carburetor adjustment
Your machine can be equipped with a low emission carburetor. We recommend that you have any adjustment of the carburetor made exclusively by an authorized service center, which disposes of special equipment for ensuring the best performance with the lowest emissions. To adjust the speed to the minimum, turn the screw marked (T) as shown: With the engine running and well warmed up, turn the screw (T) gently clockwise, until the engine rotates at regular speed (stead noise), without the cutting devices in motion. If the cutting devices are moving, turn the screw (T) gently counterclockwise until you obtain the proper adjustment.
The correct minimum speed is shown in the instruction manual in the paragraph of technical data.
CAUTION! All the above adjustments should be made with the cutting devices correctly installed.
CAUTION! Start the brush cutter in a flat place. During startup stand in a stable position. Make sure the blade or nylon string head do not touch the ground or any obstacles.
The warranty may be invalidated due to erroneous adjustments made by personnel not belonging to authorized service centers.
L. Routine maintenance
Check periodically to see that all the screws in the machine are securely fastened in place. Replace damaged, worn, cracked or bent blades. Always make sure the blade or nylon string head is correctly installed and the nut holding the blade is tight.
L1. Cleaning the air filter
(At least every 25 hours of work). A clogged filter causes alteration of the carburetor adjustment, reducing power and increasing fuel consumption, as well as causing difficulties in startup. Open the cover on the filter as shown in the figure by pressing in the point indicated by the arrow for release. Clean the inside of the filter housing thoroughly (fig. L2). The filter can be cleaned using gentle jets of compressed air. For more thorough cleaning it can be washed in soapy water.
L3. Gearbox
Every 50 working hours add grease for high speed gears in the gearbox, through the hole (C).
L4. Spark plug
Periodically (at least every 50 hours) remove and clean the spark plug and set the space between the electrodes (0.5/0.6 mm). Replace it if excessively encrusted or, in any case, after 100 working hours. In case of excessive
encrustation check the carburetor adjustment, the percentage of oil in the fuel mixture and make sure the oil is of excellent quality and suitable for
L5. Fuel filter
To clean or replace the filter, remove the cap on the tank and take the filter out using a hook or
CAUTION! Regularly it is important, in order to prevent the engine from overheating, to remove the dust and dirt from the vents, the cylinder cover and fins on the cylinder, using a wooden scraper.
CAUTION! In case of prolonged disuse, empty the fuel tank and run the engine until it is out of gas. Store the brush cutter in a dry place.
L6. Attachments maintenance (for split shaft models only)
Follow maintenance instructions on the attachment manual.
M. Replacement of nylon string
CAUTION! Use only the recommended type of nylon string. Do not use steel wires for any reason, in order to prevent serious injury.
M1. String replacement (String head A)
(1) If, when you bump the nylon string head on the ground, no more string comes out, it means there is none left and you have to replace it. To replace the reel of string, press both the release pawls indicated by the arrows, remove the empty reel (2), unroll any string left and rewind the new string. (3) Open the original package of string and insert the ends of the two strings in the eyelets on the reel, then wind the strings completely on the reel in the same direction and fasten the end of each string in the 2 opposite grooves. (4) Replace the reel in its housing and thread the ends of the strings in their bushings. Pull each string so that about 15 cm comes out
8 - ENGLISH
on each side Reassemble the nylon string head as shown. (5) Start the machine and repeat the procedures described in the section “Supply of nylon string”.
M2. String replacement (String head B)
(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. (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. (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 15cm (6inch) of line out on either side. (8) Reassemble the nylon string head as
