Replace Spark Plug - Craftsman 358.351580 Operator's Manual

INSPECT MUFFLER AND SPARK • Replace
any broken or cracked muf-
ARRESTOR SCREEN
As the unit is used, carbon deposits
build up on the muffler and 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
Muffler
Cover
Screws
Body Muffler
Cover
CLEANING THE SPARK
ARRESTOR SCREEN
Cleaning is required evew 25 hours of
operation or annually, whichever comes
first.
• Loosen and remove the 2 muffler cov- Screws
er screws.
• Remove the muffler cover (cover
snaps off muffler body).
Plug
• Remove muffler diffuser and spark Boot
arrestor screen assembly. Notice the
orientationof these pads for reassem-
bling.
• Clean the spark arrestor screen with a Spark
wire brush. Replace screen if breaks Plug
are found.
fler parts.
• Reinstall diffuser and spark arrestor
screen assembly with holes facing up
and towards muffler cover.
• Reinstall muffler cover and 2 screws
(-/-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 the 3 screws on the cylinder
cover.
• Remove the cylinder cover.
• Pull off the spark plug boot.
• Remove spark plugfrom cylinder and
discard.
• Replace with Champion CJ7Y spark
plug and tighten with a 3/4 inch socket
wrench (10-12 ft-lbs). Spark plug gap
should be .025 in.
• Reinstall the spark plug boot.
• Reinstall the cylindercover and 3
screws (15-20 in-lbs).
Cylinder
.CH_AIN REPLACEMENT
CAUTION:
Wear protective gloves
when handling chain. "l_hechain is
sharp and can cut you even when it is
not moving.
It is normal for a new chain to stretch dur-
ing the first 15 minutes of oparation. You
should recheck your chain tension fre-
quenify and adjust the chain tension as
required. See Chain Tension section.
• Move On/Stop switch to the Stop
position.
• Replace the old chain when it be-
comes worn or damaged.
" --_U_e 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 re-
place and sharpen individualcutters
on your chain.
• Remove bar clamp nuts.
• Remove bar clamp.
• Remove the old chain.
Bar
Clamp
14
Bar
Clamp Nuts