Sears 247.38824 - Manual (Page 13)

• Only use high quality detergent oil rated with
API service classification SF, SG or SH. Select
the oil’s viscosity grade according to your
expected operating temperature. Refer to page
10 of this manual for viscosity chart.
• Stop engine and wait several minutes before
checking oil level. With engine on level ground,
the oil must be to FULL mark on dipstick .
To Change Engine Oil
Change oil every 25 hours of mower operation. Drain
oil while engine is warm. Follow the instructions given
below to change oil.
•
Tip the mower with the spark plug facing up.
• Place a container under the dipstick. Pull the
dipstick out of oil fill.
• Drain the oil sump empty, collecting oil in an
approved container.
• Fill oil sump with 21 ounces of fresh SAE 30 oil.
Refer to page 10 of this manual for oil fill-up
instructions.
Air Cleaner
The air cleaner prevents damaging dirt, dust, etc.,
from entering the carburetor and being forced into the
engine, and is important to engine life and
performance. Replace air cleaner filter once a year or
every 100 operating hours, more often if used in
extremely dusty conditions.
To Service Air Cleaner:
• Turn air filter cover counterclockwise and
remove the cover and filter from the flange.
See Figure 11. Discard filter.
Engine Oil
Flange
Filter Retainer
Cover
Clean cover and flange thoroughly.
Insert the new filter into the cover.
Place the cover and the filter against flange
with tab on the cover inserted into lower left
corner of slot in flange. See Figure 11.
Push cover firmly against flange and turn it
clockwise as far as it will go. Make sure that the
retainers are locked around the flange. See
Figure 11.
A WARNING: Never run the engine without
air cleaner completely assembled.
Clean Engine
* Clean engine periodically. Remove dirt and
debris with a cloth or brush.
• Frequently remove grass clippings, dirt and
debris from cooling fins, air intake screen and
levers and linkage. This will help ensure
adequate cooling and correct engine speed.
NOTE: Do not clean with a forceful spray of water as
water could contaminate the fuel system.
Spark Plug
® Clean spark plug and reset gap to .030" at least
once a season or every 50 hours of operation.
See Figure 12. Spark plug replacement is
recommended at the start of each season. Refer
to engine parts list for correct spark plug type.
NOTE: Do not sandblast spark plug. Sparkplug
should be cleaned by scraping or wire brushing and
washing with a commercial solvent.
Feeler gap .030”
Spark Plug
Figure 12
Muffler
A
Figure 11
WARNING: Do not operate the lawn
mower without a muffler, or tamper with
the exhaust system. Damaged mufflers or
spark arresters could create a fire hazard.
Temperature of muffler and nearby areas
may exceed 150° F(65°C).
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