is not covered.
AIR FILTER INSPECTION AND CLEANING - FOAM ELEMENT
CAUTION: The air filter must be serviced (cleaned) after 25 hours normal working.
Service more frequently when operating the machine in extremely dusty areas.
1. Release the air filter cover (fig. 24A).
2. Remove the air filter cover. Be careful to prevent dirt and debris from falling into the air filter
base.
3. Remove the air filter from the air filter base.
4. Wash the foam element (fig. 25A) in liquid detergent and water. DO NOT USE GASOLINE!
5. Air dry filter element.
6. Place a few drops of motor oil on the foam filter and squeeze tightly to evenly distribute the
oil remove and to any excess oil.
7. Install the filter back.
8. Close the cover (fig. 25B) and secure it.
NOTE: Replace filter if frayed, torn, damaged or unable to be cleaned.
SPARK PLUG
For best results, replace the spark plug every 100 hours of use. Use only the recommended spark
plug which is the correct heat range for normal engine operating temperatures. To find actual
types of recommended spark plugs please contact an authorized service center.
Warning!!! If the engine has been running, the muffler and the spark plug will be
very hot. Be carefull not to touch this parts.
NOTE: Incorrect spark plugs can cause engine damage.
For good performance, the spark plug must be properly gapped and free of deposits.
1. Disconnect the cap from the spark plug (fig. 26A), and remove any dirt from the spark plug
area.
2. Use the proper size spark plug wrench (fig. 26B) to remove the spark plug.
3. Inspect the spark plug. Replace it if damaged, badly fouled, if the sealing washer is in poor
condition, or if the electrode is worn.
4. Measure the electrode gap (fig. 27A) with a suitable gauge (fig. 27B). The correct gap is
listed in the Specifications. If adjustment is needed, correct the gap by carefully bending the
side electrode.
5. Install the spark plug carefully, by hand, to avoid cross-threading.
6. After the spark plug is seated, tighten with the proper size spark plug wrench to compress
the washer.
7. When installing a new spark plug, tighten by 1/2 turn after the spark plug seats to compress
the washer.
8. When reinstalling the original spark plug, tighten by 1/8 - 1/4 turn after the spark plug seats
to compress the washer.
NOTE: A loose spark plug can become very hot and can damage the engine. Over
tightening the spark plug can damage the threads in the cylinder head.
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