Craftsman 917.255551 Owner's Manual page 17

MAINTENANCE
AIR FILTER FOAM PRE-CLEANER (See Fig. 16)
Your engine will not run properly and may be damaged by
using a dirty air filter. Clean the foam pre-cleaner element
after every 25 hours of operation, more often if tractor is
used in very dusty, dirty conditions.
• Remove knob and cover.
• Remove foam pre-cleaner element by sliding it off of
the paper cartridge.
NOTE: Do not attempt to clean or oil the paper cartridge.
Replace paper cartridge once a year or after every 100
hours of operation; more often if used in very dusty or dirty
conditions.
• Wash foam pre-cleaner in liquid detergent and water.
• Wrap foam pre-cleanerin cloth and squeeze dry.
• Lightly coat foam pre-cleaner with clean engine oil.
Squeeze in towel to remove excess oil. Do not satu-
rate.
• Install foam pre-cleaner over paper cartridge.
• Reassemble cover and tighten knob securely.
-COVER KNOB
MR CLEANER
COVER
NUT
FOAM
PRE-CLEANER
AIR INTAKE
SC
AIR CLEANER
PAPER CARTRIDGE
MR CLEANER
'BASE
ENGINE OIL
AND DIPS_CK
OIL DRAIN
PLUG
CLEAN AIR INTAKE/COOLING AREAS (See
Fig. 16)
To insure proper cooling, make sure the grass screen,
cooling fins, and other external surfaces of the engine are
kept clean at all times.
Every 100 hours of operation (more often under extremely
dusty, dirty conditions), remove the blower housing and
other cooling shrouds. Clean the cooling fins and external
surfaces as necessary. Make sure the cooling shroudsare
reinstalled.
NOTE; Operating the enginewith ab!ocked grass screen,
dirty or plugged cooling fins, and/or cooling shrouds re-
moved, will cause engine damage due to overheating.
MUFFLER
Inspect and replace corroded muffler and spark arrester (if
equipped) as it could create a fire hazard and/or damage.
SPARK PLUGS
Replace spark plugs at the beginning of each mowing
season or after every 100 hours of use, whichever comes
first. Spark plug type and gap setting is shown in "PROD-
UCT SPECiFiCATIONS" on page 3 of this manual.
FIG. 16
17