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• Replaceanybrokenorcrackedmuf-
tierparts.
• Reinstalldiffuserandsparkarrestor
screenassemblywithroundholes
facingup.
• Reinstallmufflercoverand2screws
(7-8ff-lbs).
REPLACE SPARK PLUG
The spark plug should be replaced
each year to ensure the engine starts
easier and runs better. Ignition timing
is fixed and nonadjustable.
• Loosen 3 screws on cylinder cover.
• Remove the cylinder cover.
• Pull off the spark plug boot.
• Remove spark plug from cylinder
and discard.
• Replace with Champion RCJ7Y
spark plug and tighten with a 3/4 inch
socket wrench (10-12 ff-lbs). Spark
plug gap should be .025 in.
• Reinstall the spark plug boot.
• Reinstall the cylinder cover and 3
screws (15-20 in-tbs).
Screws Cy_inde
Spark _ Cover
Plug Bo_
CHAIN REPLACEMENT
_kWARNING: Wear protective
gloves when handling chain. The
chain is sharp and can cut you even
when it is not moving.
It is normal for a new chain to stretch
during the first 15 minutes of operation.
You should recheck your chain tension
frequently and adjust the chain tension
as required. See CHAIN TENSION sec-
tion.
• Move ON/STOP switch to the STOP
position.
• Replace the old chain when it be-
comes worn or damaged.
• Use only the Low-Kickback replace-
ment chain specified in the repair
parts list. The correct replacement
bar and chain is also specified on a
decal located on the chain saw.
• See your Sears Service Center to
replace and sharpen individual cut-
ters on your chain.
• Remove bar clamp nuts.
• Remove bar clamp.
• Remove the old chain.
S_r
C_amp Nuts
• Turn adjusting screw by hand coun-
terclockwise until adjusting pin just
touches the stop.
• Slide guide bar behind clutch drum
until guide bar stops against clutch
drum sprocket.
• Carefully remove new chain from
package. Hold chain with the drive
links as shown.
Drive Links
• Place chain over and behind clutch.
• Fit bottom of drive links between
teeth in sprocket nose.
• Fit chain drive links into bar groove.
• Pull guide bar forward until chain is
snug in guide bar groove.
• Now, install bar clamp making sure
the adjusting pin is positioned in the
lower hole in the guide bar.
\,_ _.t Lower
Adjusting Guide Bar
Pin
14
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