Craftsman 247.775870 - Manual (Page 13)

To Service Air Cleaner:
1. Service pre-cleaner after every 25 hours of use,
or at least once a season.
2. Service filter every 100 hours of use, or at least
once a season.
3. Service pre-cleaner and filter more often under
dusty conditions.
• Remove wing nut and cover. For location, see
figure 14 inset.
• Slide pre-cleaner off filter. Clean the inside of
base and cover thoroughly. See figure 14.
• Clean pre-cleaner as follows:
c. Wash in water and detergent solution, and
squeeze (do nottwist) until all dirt is removed.
d. Rinse thoroughly in clear water.
e. Wrap in a clean cloth and squeeze (do not
twist) until completely dry, or allow to air dry.
f. Saturate with engine oil and squeeze (don’t
twist) to distribute oil and remove excess oil.
NOTE: If the pre-cleaner is torn or damaged in any
way, replace it.
• If necessary, replace paper fitter —do not
attempt to clean. Install new filter on base.
• Slide pre-cleaner over filter.
• Install cover and wing nut,
• Tighten wing nut 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.
See figure 15.
• Yearly or every 25 hours, whichever occurs first,
remove the blower housing and clean the areas
shown in figure 15 to avoid overspeeding,
overheating and engine damage. Clean more
often if necessary.
NOTE: Cleaning with a forceful spray of waferrs not
recommended as water could contaminate the fuel
system.
A
WARNING: Temperature of muffler and
nearby areas may exceed 150® F(65°C).
Avoid these areas.
Spark Plug
• Clean the spark plug and reset the gap to .030"
at least once a season or every 50 hours of
operation. See figure 16. Spark plug
replacement is recommended at the start of
each season. Refer to engine parts list for
correct spark plug type.
.030 ” Feeler
NOTE: Do not sandblast spark plug. Sparkplug
should be cleaned by scraping or wire brushing and
washing with a commercial solvent.
Muffler
• 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.
WARNING: 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.
LUBRICATION
Lubricate the pivot points on the release bar, hopper
assembly, and discharge chute once a season using
a light oil. Refer to the lubrication chart in figure 17.
Figure 17
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