Sears 247.79585 - Manual (Page 12)

AIR CLEANER
The air cleaner prevents damaging dirt, dust, etc.,
from entering the carburetor and being force id into the
engine and is important to engine life and per­
formance.
Never run your engine without air cleaner com­
pletely assembled.
To Service Air Cleaner:
Service foam filter after every 25 hours of jse, or at
least once a season. Service paper filter every 100
hours of use, or at least once a season. Seivice foam
filter and paper filter more often under dusty CDnditions.
• Remove wing nut and cover. Remove paper filter.
See figure 15.
• Remove and inspect filters for discolorat on or dirt
accumulation. If necessary, service as foil 3ws.
• Foam filter: Clean and re-oil every three months or
every 25 operating hours. Clean and re-oi daily if
used in extremely dusty conditions.
• Wash in water and detergent solution. Squeeze
(don’t twist) until all dirt is removed.
• Rinse thoroughly in clear water.
• Wrap in a clean cloth and squeeze (don’t twist)
until completely dry.
• Saturate with engine oil. Squeeze (don
t
twist) to
distribute oil and remove excess oil.
• Paper filter: Replace once a year or every 100
operating hours, or more often if used in extremely
dusty conditions.
• Clean inside of base and cover thoroughly.
• Replace paper and foam filters, making sure the
screen side is toward the paper filter. Replace cover
and wing nut. Tighten securely.
Base
Foam Filter Wmg
Nut
Cover
CLEAN ENGINE
Clean engine periodically. Remove dirt and debris
with a cloth or brush. Cleaning with a forceful spray of
water is not recommended as water could contami­
nate the fuel system.
Yearly or every 25 hours, whichever occurs first,
remove the blower housing and clean the areas
shown in figure 16 to avoid overspeeding, overheating
and engine damage. Clean more often if necessary.
A
WARNING: PERIODICALLY CLEAN MUF­
FLER AREA TO REMOVE ALL GRASS,
DIRT AND COMBUSTIBLE DEBRIS.
Cooling Fins
FIGURE 16.
SPARK PLUG
The spark plug should be cleaned and the gap reset
to .030" at least once a season or every 50 hours of
operation. See figure 17. 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. Spark plug
should be cleaned by scraping or wire brushing and
washing with a commercial solvent.
FIGURE 15.
MUFFLER
Do not operate the chipper-shredder without a muffler
or tamper with the exhaust system. Damaged mufflers
or spark arresters could create a fire hazard. Inspect
periodically, and replace if necessary. If your engine
is equipped with a spark arrester screen assembly,
remove every 50 hours for cleaning and inspection.
Replace if damaged.
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