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• Add lubricant to sprocket hole after
each use.
• Burring of guide bar rails is a normal
process of rail wear. Remove these
burrs with a flat file.
• When rail top is uneven, use a fiat file
to restore square edges and sides.
File Edges andsides Square
Worn Groove Correct Groove
Replace guide bar when the groove is
worn, the guide bar is bent or cracked,
or when excess heating or burring of
the rails occurs. If replacement is nec-
essary, use only the guide bar specified
for your saw in the repair parts list or on
the decal located on the chain saw.
INSPECT MUFFLER AND SPARK
ARRESTOR SCREEN
As the unit is used, carbon deposits
build upon the muffÊerand spark
arrestor screen, and must be removed
to avoid creating a fire hazard or affect-
ing engine performance.
Replace the spark arrestor screen if
breaks occur.
Muffler Diffuser
Spark
Arrestor
Screen
Muffler
Cover
/
CLEAN UNIT & LABELS Muffler
• Clean the unitusing a damp cloth with Body
a mild detergent.
• Wipe off unitwith a clean dry cloth.
CLEAN AIR FILTER
A dirty air filter decreases the life and
performance of the engine and in-
creases fuel consumption and harmful
emissions. Always clean your air filter
after 15 tanks of fuel or 5 hours of op-
eration, whichever comes first. Clean
more frequently in dusty conditions. A
used air filter can never be completely
cleaned. It is advisable to replace your
air filter with a new one after every 50
hours of operation, or annually, which-
ever comes first. To clean filter:
• Loosen 3 screws on cylinder cover.
• Remove cylinder cover.
• Remove air filter.
• Clean the air filter using hot soapy
water. Rinse with clean cool water.
Air dry completely before reinstalling.
• Lightly oil air filter before installing to
improve the efficiency of air filter. Use
2-cycle engine oil or motor oil (SAE
30). Squeeze excess oil from filter.
• Reinstall air filter.
• Reinstall cylinder cover and 3 screws
(15-20 in-lbs.).
Cylinder Cover
Air Filter Screws
Cylinder
Cover
Muffler Cover
CLEANING THE SPARK
ARRESTOR SCREEN
Cleaning is required every 25 hours of
operation or annually, whichever comes
first.
• Loosen and remove the 2 muffler cov-
er screws.
• Remove the muffler cover (cover
snaps off muffler body).
• Remove muffler diffuser and spark
arrestor screen assembly. Notice the
orientation of these partsfor reassem-
bling.
• Clean the spark arrestor screen with a
wire brush. Replace screen if breaks
are found.
• Replace any broken or cracked muf-
fler parts.
• Reinstall diffuser and spark arrestor
screen assembly with round holes
facing up.
• Reinstall muffler cover and 2 screws
(7-8 ft-lbs).
REPLACE SPARK PLUG
The spark plug should be replaced
each year to ensure the engine starts
easier and runs better. Ignitiontiming is
fixed and nonadjustable.
• Loosen 3 screws on cylinder cover.
• Remove the cylinder cover.
• Pull offthe spark plug boot.
• Remove spark plugfrom cylinder and
discard.
13
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