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).
To set hi speed screw H: close screw H turning it clock- wise without forcing .
Then open screw 1 full turn (counterclockwise) .
If the engine speed is too high, open the screw about 1/8 turn (counterclockwise). Optimal adjustment is found between 1 and 1 1/4 turns.
•I: The I (IDLE) screw controls the throttle opening to gov- ern idle speed (2800
CAUTION: increased idle speed may cause chain move- ment.
The carburetor is adjusted for normal operation during pro- duction. When considerable changes of altitude require a supplementary adjustment, contact an authorised service station which offers the latest in tools, parts and technical assistance.
H. Routine maintenance
Ensure engine is always switched off before any kind of maintenance operation.
CHAIN: Check tension regularly. A new chain will require more frequent adjustment. Loosen retention nuts. Tighten chain (see assembly instructions). Tighten retention nuts and adjust.
1BAR
–Clean the bar groove (K) and check the lubrication holes (L) in the bar to ensure that they are not clogged.
–Grease sprocket periodically. Rotate sprocket and repeat.
–Rotate bar periodically to maximise bar life.
2AIR FILTER
–A dust clogged air filter may cause carburetor problems. This may prevent the engine from reaching its maximum r.p.m. and cause high fuel consumption.
–Remove cover.
–Wash filter in petrol (do not use fuel which is mixed with oil).
–The filter can also be cleaned with compressed air.
–Replace filter if damaged or if it does not seal tightly in the air box.
3SPARK PLUG
Remove and clean the spark plug every 30 hours. Check the electrode gap (0,5/0,6 mm. - 0.025 inches).
–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 fuel mix) or a poor quality of oil in the fuel mix. Check and correct.
4OIL FILTER
The oil filter is on the end of the oil suction hose inside the oil tank.
To clean and replace the filter pull it out through the oil tank filter opening. Use a piece of bent wire or long forceps. To remove deposits from the oil tank
Never use waste oil.
5FUEL FILTER
To change fuel filter remove the tank cap and pull out the filter with a piece of bent wire or long forceps. Replace the filter as shown in the illustration and reposition it. It is rec- ommended to replace the fuel filter at least once a year.
CHAIN BRAKE
–WARNING: Contact your service dealer if anything appears wrong with your chain brake. Do not disassem- ble or manipulate the mechanism of the chain brake.
–Clean the brake mechanism periodically (without disas- sembling it) and control the wear of the band visually.
•PERIODICALLY: It is important to clean the saw thor- oughly particularly around cylinder fins to avoid over- heating of the engine.
•LONG STORAGE: Empty fuel and run engine until dry.
I. Safety chain brake
Your chain saw is fitted with a safety chainbrake designed to stop the chain in milliseconds in case of kickback. Always hold the saw firmly in both hands.
The chain brake does not provide a total protection if the machine is used without taking the necessary precautions and mainte- nances.
The chain brake is intended to engage automatically in case of kickback.
The chain brake can also be engaged manually by pushing the chain brake lever forwards.The manual use of the chain brake is recommended only at idle.
Always test the chain brake before using your saw. Do this by engaging the brake at idle (see below).
Always release the brake before starting.
Kickback may occur if the end of the bar (see illustrated angle) touches any solid object.
Never attempt to start a cut with the end of the bar. Kickback is a violent upward and rearward movement of the bar and may cause you to lose control of the machine. Therefore you should avoid starting a cut with this part of the bar. Always keep a firm grip on the saw with both hands because, in case of kickback, it is the contact of the left hand with the brake lever which will help to engage the brake.
CHAIN BRAKE TESTING:
1The chain brake (A) is disengaged when brake lever is pulled back and locked(chain can move).
2The chain brake (A) is engaged when brake lever is in the position (chain cannot rotate).
