LONCIN 1WG3.5-75FQ-D Manual De Uso página 35

2. Maintenance of air filter
A dirty air filter will obstruct air into the carburetor. So in order to prevent fault of carburetor, the
air filter shall be maintained regularly. If the engine is to work in a dusty environment, its
maintenance frequency should be increased.
Warning! Never use gasoline or low-burning-point detergent to clean air filter element because
they may cause burning.
Note! Never try to run the engine without an air filter, because such operation would cause quick
wear of the engine.
① Take apart the wing nut and air filter housing and take out the filter element.
② Use an uninflammable or high-burning-point detergent to clean filter element and let it dry up.
③ Drench filter element with engine oil and then squeeze the oil out.
④ Refit filter element and air filter housing
3. Maintenance of spark plug
Note! Never use any spark plug with an incorrect heat range. In order to guarantee normal running
of the engine, the spark plug shall have an appropriate gap without deposit on it.
① Use a special socket spanner to detach the spark plug.
Special socket spanner for spark plug
Warning! If the engine has just stopped running, the muffler will be very hot. So keep clear of hot
temperature to avoid scald.
② Check the spark plug. If it is obviously worn or the insulation has any crack or damage,
please replace it, if it has too much carbon deposition; use a wire brush to clean it.
③ Use a clearance gauge to measure the spark plug gap, correct value of which shall be 0.70to
0.80mm.
④ Check whether spark plug washer is good. In order to avoid thread alternating, use hand to
screw spark plug in first.
⑤ After screwing spark plug to the bottom, use a special socket spanner to tighten it and the
washer below it.
Note! If the spark plug is a new one, tighten the spark plug further by 1/2 turn after the washer is
pressed down tightly.
If the spark plug has been used, tighten it further by 1／8一l／4 turn after the washer is
pressed down tightly.
The spark plug must be tightened adequately, orit will be heated and damage the engine.
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