Craftsman C944.414420 Instruction Manual page 17

CLEANING THE SPARK
ARRESTING SCREEN
Cleaning is required every 25 hours of
operation or annually, whichever
comes first.
1. Loosen and remove the 2 muffler
cover screws,
2. Remove the muffler cover (cover
snaps off muffler body).
3. Remove muffler diffuser and sperk
arresting screen assembly. Notice
the orientation of parts for reas-
sembling.
4. Clean the spark arresting screen
with a wire brush. Replace screen
if breaks are found.
5. Replace any broken or cracked
muffler parts.
6. Reinstall diffuser and sperk arrest-
ing screen assembly with round
holes facing up.
7. Reinstall muffter cover and 2
screws, Tighten securely.
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.
1. Loosen 3 screws on cylinder cover.
2. Remove the cylinder cover.
3. Pull off the sperk plug boot.
4. Remove spark plug from cylinder
and discard.
5. Replace with Champion CJ-7Y
spark plug and tighten securely
with a 3/4 inch socket wrench.
Spark plug gap should be 0.025
inch.
6. Reinstall the spark plug boot.
7. Reinstall the cylinder cover and 3
screws. Tighten securely.
Screws_ Cylinde
Plug Boot
Plug
REPLACE FUEL FILTER
To replace the fuel filter, drain your unit
by running it dry of fuel Remove fuel
cap and its connected retainer from
tank. Pull filter from tank and remove
from line, Replace and reassemble.
_WARNING: Disconnect the spark
plug before performing maintenance,
service, or adjustments except for car-
buretor adjustments.
CHAIN SHARPENING
Chain sharpening requires special
tools. You can purchase sharpening
tools at Sears or go to a professional
chain sharpener.
CHAIN REPLACEMENT
_WARNING: 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
frequenl_y and adjust De chain tension
as required. See CHAIN TENSION sec-
tion.
Replace the old chain when it be-
comes worn or damaged. Use only the
Low-Kickback replacement chain spe-
cified in the repair parts list. The cor-
rect replacement bar and chain is also
specified on a decal located on the
chain saw.
See your Sears Service Centre to re-
place and sharpen individual cutters
on your chain.
TO REPLACE CHAIN:
1. Move ON/STOP switch to the STOP
position.
2. Remove chain brake nuts.
3. Remove chain brake.
Chain
Brake
Chain Brake
Nuts
4. Turn adjusting scraw on bar coun-
terclockwise to move the tension-
ing rack as far as it will go toward
the front of the bar,
17