Craftsman 917.257573 Owner's Manual page 17

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CUSTOMER
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AIR FILTER (See Fig. 15)
Your engine will not run properly using a dirty air filter,
Clean the foam pre-cleaner after every 25 hours of opera-
tion or every season,, Service paper cartridge every 100
hours of operation or every season, whichever occurs first,,
Service air cleaner more often under dusty conditions,
° Remove knob(s) and cover.
TO SERVICE PRE-CLEANER
° Slide foam pre-cleaner off cartridge..
- Wash it in liquid detergent and water..
o Squeeze it dry in a clean cloth.
• Saturate it in engine oil. Wrap it in clean, absorbent
cloth and squeeze to remove excess oil.
° If very dirty or damaged, replace pre-cleaner..
, Reinstall pre-cteaner over cartridge..
- Reinstall cover and secure with knob(s).
TO SERVICE CARTRIDGE
,, Remove cartridge nut.
, Carefully remove cartridge to prevent debris from en-
tering carburetor. Clean base carefully to prevent
debris from entering carburetor.
° Clean cartridge by tapping gently on flat surface.. If very
dirty or damaged, replace cartridge.
° Reinstall cartridge, nut, precleaner, cover and secure
with knob(s)..
IMPORTANT: PETROLEUM SOLVENTS, SUCH AS
KEROSENE, ARE NOT TO BE USED TO CLEAN THE
CARTRIDGE. THEY MAY CAUSE DETERIORATION OF
THE CARTRIDGE,. DO NOT OIL CARTRIDGE., DO NOT
USE PRESSURIZED AIR TO CLEAN OR DRY
CARTRIDGE,,
COVER KNOB"--'_
CARTRIDGE
ESPONS LDT ES
CLEAN AiR SCREEN (See Fig, 16)
Air screen must be kept free of dirt and chaff to prevent
engine damage from overheating Clean with a wire brush
or compressed air to remove dirt and stubborn dried gum
fibers_
ENGINE COOLING FINS (See Fig. 16)
Remove any dust, dirt or oil from engine cooling fins to
prevent engine damage from overheating.,
,, Remove screws from blower housing and lift housing
and dipstick tube assembly off engine,
• Cover oil fill opening to prevent entry of dirt..
° Use compressed air or stiff bristle brush to thoroughly
clean engine cooling fins
° To reassemble, reverse above procedure_
SCREWS
DIPSTICK TUBE
ASSEMBLY
BLOWER HOUSING
AIR SCREEN
SCREWS
SPARK
PLUG
ENGINE COOLING FINS
FIG. 16
FIG. 15
17