Sears 247.37035 - Manual (Page 13)

Engine Oil
• 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.
• Change engine oil after the first five hours of
operation, and every twenty-five hours
thereafter.
To Change Engine Oil
Change oii after first two operating hours and every
25 operating hours thereafter. Drain oil while engine
is warm. Follow the instructions given below.
•
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 27 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. The air cleaner consists of a foam filter
(if so equipped), and a paper filter.
WARNING: Never run the engine without air
cleaner completely assembled.
A
To Service Air Cleaner:
1. Replace paper filter every 100 hours of use,
more often if used in extremely dusty conditions.
2. Service foam filter (if so equipped) every three
months or after every 25 hours of use. Clean
and re-oil daily if used in extremely dusty
conditions.
• Remove cover screw and cover; do not remove
screw from cover. See Figure 10 inset.
• Swing cover down to remove from hinge. See
Figure 10.
• Inspect foam filter for discoloration or dirt
accumulation. If either is present, service filter.
• Wash foam filter in water and detergent
solution, and squeeze (do not twist) until all dirt
is removed.
• Rinse the foam filter thoroughly in clear water.
Wrap in a clean cloth and squeeze (do not
twist) until completely dry, or allow to air dry.
Saturate with engine oil and squeeze (don’t
twist) to distribute oil and remove excess oil.
Cover Screw
Cover '
Cover
Hinge
Figure 10
• If necessary, replace paper filter (do not attempt
to clean). Install new filter on base.
• Swing cover upward and align hinge on the
cover with that on the engine.
• Tighten cover screw securely.
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 11. 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
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