Craftsman 247.377300 Manual Del Operador página 16

Always stop engine, allow engine to cool, disconnect spark plug wire, and
ground against engine before performing any type of maintenance on your
machine.
General Recommendations
• Always observe safety rules when performing any maintenance.
• The warranty on this lawn mower does not cover items that have been
subjected to operator abuse or negligence. To receive full value from
warranty, operator must maintain the equipment as
instructed here.
• Changing of engine-governed speed will void engine warranty.
• All adjustments should be checked at least once each season.
• Periodically check all fasteners and make sure these are tight.
Engine Maintenance
Spark Plug
For good performance, the spark plug must be properly gapped and free of
deposits. Replace the spark plug annually.
1. Disconnect the cap from the spark plug, and remove any dirt from the spark
plug area.
2. Use the proper size spark plug wrench to remove the spark plug.
3. Visually inspect the spark plug. Discard the spark plug if there is apparent
wear, or if the insulator is cracked or chipped. Clean the spark plug with a
wire brush if it is to be reused.
4. Check the gap with a wire gauge. See Figure 16. Spark plug gap should be
0.030 in (0.76 mm). If necessary, reset the gap.
5. Check that the spark plug washer is in good condition and thread the spark
plug in by hand to prevent cross-threading.
6. After the spark plug is seated, tighten with a spark plug wrench to compress
the washer.
NOTE: When installing a new spark plug, tighten 1/2 turn after the spark
plug seats to compress the washer. When reinstalling a used spark plug,
tighten 1/8-1/4 turn after the spark plug seats to compress the washer.
IMPORTANT: The spark plug must be securely tightened. An improperly
tightened spark plug can become very hot and may damage the engine.
7. Attach the spark plug cap to the spark plug.
Air Filter
Paper filters cannot be cleaned and must be replaced once a year or every 100
operating hours; more often if used in extremely dusty conditions.
Never use gasoline or low flash point solvents for cleaning the air filter
element. A fire or explosion could result.
IMPORTANT: Never run the engine without the air filter. Rapid engine wear will
result.
SERVICE AND MAINTENANCE
WARNING
WARNING
Electrode
0.030 in. (.76mm)
Paper Element
Tab
1. Press down on the tabs securing the air filter cover. Pull back and remove the
cover. See Figure 17.
2. Remove the paper element. To loosen debris, gently tap the filter on a hard
surface. If the filter is excessively dirty or damaged, replace with a new filter.
3. Insert the cover's bottom tabs into slots in bottom of base.
4. Tilt the cover up into place and secure with tabs.
16
Porcelain
Figure 16
Figure 17