Craftsman 247.799620 - Manual (Page 14)

AIR CLEANER
The air cleaner prevents damaging dirt, du st, etc.,
from entering the carburetor, and being forced into the
engine. It is important to keep the engine clear to pro­
long engine life and improve performance.
Never run your engine without air cleaner com­
pletely assembled.
To Service Air Cleaner:
Service pre-cleaner after every 25 hours of us e, or at
least once a season. Replace filter every 100 hours of
use, or at least once a season. Service pre-clesner and
filter more often under dusty conditions.
• Remove wing nut and cover. See figure 16.
• Slide pre-cleaner off filter. Clean the inside of base
and cover thoroughly.
• Clean pre-cleaner as follows.
Wash in water and detergent solution, and £ queeze
(do not twist) until all dirt is removed.
Rinse thoroughly in clear water.
Wrap in a clean cloth and squeeze (do not twist)
until completely dry, or allow to air dry.
• If necessary, replace filter (do not attempt tc clean).
• Install new filter on base. Slide pre-dearer over
filter.
• Install cover and wing nut. Tighten w ng nut
securely.
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 of using, whichever occurs
first, remove the air intake screen and blower
housing, and clean the areas shown in figure 17 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.
FIGURE 17.
SPARK PLUG
The spark plug should be cleaned and the gap reset
to .030" at least once a season or after every 50
hours of operation. See figure 18. Spark plug replace­
ment is recommended at the start of each season.
Replace spark plug if electrodes are pitted, burned,
fouled with deposits, or porcelain is cracked. 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.
Л/ing
Nut
( ¡over
FIGURE 16.
MUFFLER
Do not operate the chipper-vacuum 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 after every 50 hours of using for cleaning and
inspection. Replace if damaged.
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