MAINTENANCE
Correctly adjusted carburettor
A correctly adjusted carburettor implies that the engine accelerates without a pause and that the engine splutters slightly at full throttle. Also, the chain does not rotate at idling speed. An excessively lean setting for the
An over rich setting of both L and H results in acceleration problems or excessively low working revs.
Air filter
The air filters must be regularly cleaned from dust and dirt in order to avoid:
•Carburettor malfunctions
•Starting problems
•Engine power reduction
•Unnecessary wear on the engine parts
•Abnormal fuel consumption
Cleaning/change
Clean the filter after 25 hours or more regularly if operating conditions are exceptionally dusty.
Muffler
The muffler is designed in order to reduce the noise level and to direct the exhaust gases away from the operator. The exhaust gases are hot and can contain sparks, which may cause fire if directed against dry and combustible material.
Some mufflers are equipped with a special screen. If your saw has this type of muffler, you should clean the screen at least once a week. This is done with a wire brush. The screen must be replaced, if damaged. The engine will be overheated, if the screen is clogged. This results in damage on the cylinder and the piston.
CAUTION!
Never use a pruner with a clogged or defective muffler.
Dismantle the air filter cover and remove the air filters. Wash in clean, warm soapy water.
Ensure that the filters are dry before refitting.
An air filter used for a long period of time can never be cleaned completely.
Therefore it is necessary to replace the filter from time to time with a new filter.
A damaged air filter must always be replaced.
Spark plug
The spark plug condition is influenced by:
•An incorrect carburettor setting.
•An incorrect fuel mixture (too much or faulty oil).
•A dirty air filter.
These factors cause deposits on the spark plug electrodes, which may result in malfunction and starting difficulties.
0,5 mm |
If the engine is low on power, difficult to start or runs poorly at idling speed, always check the spark plug first.
If the spark plug is dirty, clean it and check the electrode gap. Readjust if necessary. The correct gap is 0.5 mm (.020"). The spark plug should be replaced after about one month or earlier if the electrodes are badly eroded.
IMPORTANT!
Always use the recommended spark plug type. Wrong type may ruin the piston/cylinder.
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