Craftsman 917.371881 Owner's Manual page 13

550 series briggs & stratton engine 21" rear-discharge rotary lawn mower
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TO CHANGE ENGINEOIL
1. Disconnect spark plug wire from spark
plug and place wire where it cannot
come in contact with plug.
2. Be sure lawn mower is on level sur-
face.
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 se-
curely.
5. Fil! engine with oil. (See "ADD OIL" in
the Operation sectionof 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.
Clean the element after every 25 hours
of operation or every season.
Replace
the air filter every 100 hours of operation
or every season, whichever
occurs first.
Service air cleaner more often under dusty
conditions.
TO CLEAN AIR FILTER ELEMENT
1. Remove screw.
2. Remove air cleaner carefully to prevent
dirt from entering carburetor.
3. Take air cleaner apart and clean air
filter element.
4. Wash filter element in liquid detergent
and water.
5. Wrap filter element in cloth and
squeeze dry.
6. Lightly coat filter element with clean
engine oil. Squeeze in towel to remove
excess oil. Do not saturate.
7. Reassemble
parts and put back on
carburetor.
Screw
ASSEMBLE
ONE OF THESE LOW POINTS
\_
TOWARDS NARROW EDGE OF ELEMENT
Lip
Element
Cup
Bod
ASSEMBLE
SO LIP
EXTENDS OVER
EDGE OF
AIR CLEANER
BODY
LIP WILLFORM
PROTECTIVE
SEAL WHEN
COVERISASSEMBLED
MUFFLER
Inspect and replace corroded
muffler as it
could create a fire hazard and/or damage.
SPARK
PLUG
Replace spark plug at the beginning of
each mowing season or after every 100
hours of operation, whichever
occurs
first. Spark plug type and gap setting
are shown in the "PRODUCT
SPECIFIC-
ATIONS" section of this manual.
CLEANING
IMPORTANT:
For best performance,
keep mower housing free of built-grass
and trash. Clean the underside of your
mower after each use.
ACAUTION:
Disconnect
spark plug wire
from spark plug and place wire where it
cannot come in contact with plug.
• Clean the underside of your lawn
mower by scraping to remove build-up
of grass and trash.
• Clean engine often to keep trash from
accumulating.
A clogged engine runs
hotter and shortens engine life.
• Keep finished surfaces and wheels free
of al! gasoline, oil, etc.
• We do not recommend
using a garden
hose to clean lawn mower unless the
electrical system, muffler, air filter and
carburetor
are covered to keep water
out. Water in engine can result in short-
ened engine life.
13

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