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Craftsman 917.389990 Owner's Manual page 11

4.0 horsepower 20" rear discharge rotary lawn mower

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GRASS CATCHER
• The grass catcher may be hosed with
water, but must be dry when used.
• Check your grass catcher often for
damage or deterioration. Through
normal use it will wear. If catcher
needs replacing, replace only with a
manufacturer
approved replacement
catcher.
Give the lawn mower model
number when ordering.
ENGINE
LUBRICATION
Use only high quality detergent oil rated
with API service classification SF-SJ.
Select the oil's SAE viscosity grade
according to your expected operating
temperature.
NOTE: Although multi-viscosity oils
(5W30, 10W30 etc.) improve starting in
cold weather, these multFviscosity oils
will result in increased oil consumption
when used above 32°F. Check your
engine oil level more frequently to avoid
possible engine damage from running
low on oil.
Change the oil after every 25 hours of
operation or at least once a year if the
lawn mower is not used for 25 hours in
one year.
Check the crankcase oil level before
starting the engine and after each five (5)
hours of continuous use. 33ghten oil plug
securely each time you check the oil
level.
TO CHANGE ENGINE OIL
1. Disconnect spark plug wire from spark
plug and place wire where it cannot
come in contact with spark plug.
2. Be sure lawn mower is on level
surface.
NOTE: Oil will drain more freely when
warm.Catch oil in a suitable container.
3. Remove bottom oil drain plug.
4. After oil has drained completely,
replace oil drain plug and tighten
securely.
5. Fill engine with oil. (See "ADD OIL" in
the Operation section of this manual.)
6. Reconnect spark plug wire to spark
plug.
Drain plug
AIR FILTER
Your engine will not run properly and may
be damaged by using a dirty air filter.
Replace the air filter every 100 hours of
operation or every season, whichever
occurs first. Service air cleaner more
often under dusty conditions. Do not
wash air filter.
TO CHANGE AIR FILTER
1. Remove the air filter by turning
counterclockwise to the stop and pull
away from collar.
2. Remove filter from inside of cover.
3. Clean the inside of the cover and the
collar to remove any dirt accumula-
tion.
4. Insert new filter into cover.
5. Put air filter cover and filter into collar
aligning the tab with the slot.
6. Push in on cover and turn clockwise to
tighten.
Collar
Turn counter-
clockwise
to
remove
Air filter
Tab"
_lockwise
Air filter cover
to tighten
MUFFLER
Inspect and replace corroded muffler as it
could create a fire hazard and/or dam-
age.
11

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