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2. Maintenance of the air filter in oil bath
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. Always maintain the same oil level!
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. Top up with oil as far as the indicated level (Oil type: SAE 15W-40).
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
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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