Spark Plug - Craftsman 79964 Owner's Manual

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 per-
formance.
Never run your engine without air cleaner com-
pletely assembled.
To Service Air Cleaner;
Service pre-cleaner after every 25 hours of use, or at
least once a season. Replace filter every 100 hours of
use, or at least once a season. Service pro-cleaner and
filter more often under dusty conditions.
• Remove wing nut and cover. See figure 15.
• 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 squeeze
(do not twist) until air 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.
e If necessary, replace filter (do not attempt to ctean).
• Install new filter on base. Slide pre-cleaner over
filter.
• Install cover and wing nut. Tighten wing nut
securely.
WARNING: PERIODICALLY CLEAN MUF_
FLER AREA TO REMOVE ALL GRASS,
DIRT AND COMBUSTIBLE DEBRIS.
Cool
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.
Feeler Gauge
Base Filter Pre-Cleaner Wing
I Nut
FIGURE 15.
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 air intake screen and blower housing, and
clean the areas shown in figure 16 to avoid over-
speeding, overheating and engine damage. Clean
more often if necessary.
FIGURE 17.
Plug
MUFFLER
Do not operate the chipper-vacuum without a muffler
or tamper with the exhaust system. Damaged mufflers
or spark arrestors 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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