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INSPECTMUFFLERANDSPARK
ARRESTORSCREEN
Astheunitisused,carbondeposits
builduponthe mufflerand spark
arrestorscreen,andmustbe removed
to avoidcreatinga fire hazardoraffect-
ing engineperformance.
Replacethesparkarrestorscreenif
breaksoccur.
MufflerDiffuser
Spark
Arrestor
Screen
Muffler
Cover
Screws
Body Muffler
Cover
CLEANING THE SPARK
ARRESTOR SCREEN
Cleaningis requiredevery25 hoursof
operationorannually,whichevercomes
first.
• Loosenandremovethe 2 mufflercoy- Screws
er screws.
• Removethe mufflercover(cover
snapsoffmufflerbody). Plug
• Removemufflerdiffuserandspark Boot
arrestorscreenassembly.Noticethe
orientationof thesepartsforreassem-
bling.
° Cleanthesparkarrestorscreenwitha Spark
wirebrush, Replacescreenif breaks Plug
arefound.
• Replaceanybrokenorcrackedmuf-
tierparts.
• Reinstalldiffuserandsparkarrestor
screenassemblywithholesfacing up
andtowardsmufflercover.
• Reinstallmufflercoverand 2 screws
(7-8ft-ibs.).
REPLACE SPARK PLUG
Thesparkplugshouldbe replaced
eachyear toensuretheenginestarts
easierandrunsbetter.Ignitiontimingis
fixedand nonadjustable.
• Loosenthe3 screwsonthe cylinder
cover.
• Removethecylindercover.
; Pulloffthesparkplugboot.
Removesparkplugfrom cylinderand
discard.
• ReplacewithChampionCJ7Y spark
plugandtightenwitha 3/4 inchsocket
wrench(10-12ft-lbs). Sparkpluggap
shouldbe ,025in.
• Reinstallthe sparkplugboot.
• Reinstallthecylindercoverand3
screws(15-20 in-lbs).
Cylinder
Cover
. . . , , !
CHAIN REPLACEMENT
CAUTION: Wearprotectivegloves
whenhandlingchain.The chainis
sharpandcan cutyoueven whenit is
notmoving.
Itis normalfor a newchainto stretch
duringthe first30 minutesof operation.
You shouldrecheckyourchaintension
frequently andadjustthechaintension
as required.SeeChainTensionsec-
tion.
• MoveOn/Stop:switchto the Stop
position.
• Replacetheold chain whenit be-
comeswornordamaged.
• UseonlytheLow-Kickbackreplace-
mentchainspecifiedin the repair
partslist. The correctreplacementbar
and chainisalso specifiedona decal
locatedonthechainsaw.
• See yourSearsServiceCenterto re-
placeandsharpenindividualcutters
onyourchain.
i,
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