Owner`s manual

B. 'IGNITION, COOLING AND EXHAUST SYSTEMS
• Carbon deposits will build up on exhaust
ports, spark arrestor, muffler, and spark plug
as the saw is used. All of these parts should
be cleaned at the same time to prevent
engine damage, overheating, loss of power,
and hard starting.
• Clean parts:
-- as required
--at least once for each 25-30 hours of
operation
BAFFLE
MUFFLER
COVER
SPARKARRESTOR SCREEN
Figure 46
Figure 47
CLEAN
EXHAUST
PORTS
CHAMPION CJ-8 SPARK PLUG
GAP .025"'
Figure 48
1. EXHAUST SYSTEM
• Carbon build-up on theexhaust system can
cause the engine to loose power in a cut.
• Keep the spark arrestor clean at all times.
• Replace the spark arrestor when breaks in
the screen are found.
Items required:
Wire brush
3/8" wrench
Hardwood stick
a. Disconnect the spark plug.
b, Remove the muffler, baffles, and
screen. Figure 46.
c. Pull the starter rope until the piston
moves far enough to close the exhaust
ports.
d. Scrape the carbon deposits from the
exhaustportsand surrounding extiaust
Chamber usir_g: a hardwood stick.
Figure47. :'
e: :B:low _out loos_;ned carbon withi_omo
pressed air.
f. Clean the spark arrestor screen with a
wire brushor replace if breaks in the
screen are found.
g. Reassemble muffler parts.
2. SPARK PLUG
Keep the spark plug: "
--clean
--properly gapped (.025)
• Maintenance is indicated when the engine
is hard to start.
Item required: small brush, suchas a tooth
brush, or a pocket knife.
a. Pull the rubber connector from the
spark plug and remove the spark plijg
from the cylinder.
b. Clean deposits from the electrodes of
the spark plug with a small brush or a
pocket knife. ,
_NOTE_ _Be :careful when _rem6ving;
- ::cleaning;'gappi_ng and replacing" the
spark plug. If it is damaged, it wi,lt not
work properly and must be replaced.
c. Set the gap between the electrodes to
.025 using a wire or fiat gauge. Figure
48.
d. Replace the spark plug.
C, STARTER :ROPE REPAIRAND REPLACEMENT
e
A starter rope that breaks next to the pulley
can be repaired.
Replace a starter rope that breaks more than
2 or 3 inches from the pulley.
WARNING!
Always wear eye protection when set.
vicing the starter rope. The recoil
spring beneath the pulley is under ten-
sion. If the spdng should pop out
serious personal injury could result.
NOTE: A recoil spring lies beneath the pulley
and is under tension. If therecoil spring is
disturbed considerable time and effort will be
required to reinstall. For this reason, you may
want to let your SEARS Service Center handle
this repair. If you do try to repair the starter
rope and the recoil spring pops out, take the
unit to your dealer.
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