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•D. OPERATING INSTRUOTIONS
Formaximum performanceandefficiency:
1. AJwaysaccefemtetheengine tothe desiredspeed
beforecutting.
2. Never operatethe engine at a higher speedthan
necessary.
E' ENGINE ADJUSTMENTS
L CARBURETOR ADJUSTMENTS
The carbum=torhas been carefullyadjusted at the
Pactory+Due to changesin altitude and operating
conditions,yourcarburetormay requireadjusting.To
maketheadjustment,followtheprocedurebelowvery
caretutly.
: '+
_pr
r
a. PREPARATION
1.) Usefreshfuelmix,Refertopage6.
2.) Removeair filter.See Figure17,page12.
•,. 3.) Turnbothlowspeedand highspeedmixture.
: scows clockwise _ untilfully dosed,
butdo notovertighten.
4.) Unscrewbothmixture screws one fullturn
countemlockwise_ .
. b. IDLESPEEDADJUSTMENT
_ 1,)
2J
. i1,11,i .
3. Alwaysreleasethetriggerand allowtheengineto
return toidle speed whennot cutting.
4. Makesumthe bladestopsturningwhenthethmt-
tie trigger isreleasedand the enginerunsat idle
speed. Forcorrection,referto "Carburetor Adjust.
rnents';page8.
5. Stop engine by moving theignitionswitchto the
"OFF" position. Rgure t0.
c, LOW SPEED MIXTURE ADJUSTMENT
1.) Allow enginetoidle,
2.) Turn Low Speed Mixture Screw clockwise
slowly. Notethepositionatwhichthe
enginespeedisreduced.
3.) Turn the screw slowly counterclockwise
. Notethe positionatwhichthespeed
isreduced.
:_" 4.) Set the screwmid-way betweenthese two
extremeposit_on_.
_)
4.)
ICAUTION:IRe-check Idlespeed,if theenginestalls
or bladetums, repeat "idle SpeedAdjustment"
Do not operateengine atfutlthrottle for
:prolonged periods while making high speed
adjustments asdamage to theengine canoccur.
Turn Idle Speed Screw clockwise
untiiitstops.Donotovertighten.Openscrew :. ' ... . / i .
onefulfturn countemtockwise,<-._ ...... d. HIGHSPEED MIXTUREADJUSTMENT
Startthe engine and edge for 3 minutesto . 1.) Supporttheshaftsothatthe blade isoffthe
warm upengine. • " •........ groundandwillnotcontactanyobject.
Allowengineto idle,
AdjustldlsSpeedScrewuntiltheenglnecon- * : 2.) Squeezethrottletriggerwideopen.
+. : , ,.--_3.) Turn.theHigh Speed MixtureScrew slowly
tinuesto run without stallingand wtthoutthe . "i. : : .. clockwise, _ untiltheenginespeedis
bfadeturning. " ' i:: : .... . "+ reduced,Noteposition.
lure thescrewclock_+se _ _ increase+ .. 4.) Turn the screw slowly counterclockwise
engine speed if engine : + ' " , - _ .Stopwhentheenginejustbeginsto
stalls,"
.... Turn the screw counterctock_se _ tO
slow engine down
and/orto keepthe
: . bladefromturning.
1CAUTION: ]Highandlowspeed mixtureeettingsare
highlycriticaladjustments. Ifset incorrectly,psrma-
:.nent damage will occurtothe engine. Boththelow
speed mix screw and the high speed mix screw
" should be in the range of 3/4 to 1.1/4 turns open.
runrough.
..- 5. ) Turnthescrew slowlytheminimumamount
' cloclodse _ untilthe engine runs
smoothly.
e. CHECK ACCELERATION
• . Allowtheenginetoidie, Squeezeldggetandcheck
' + engineacceleration. Ifthe engine doesnotacce-
AtR FILTER
Figure11
leratesmoothly,you may have to repeat steps
"b.3)" through "d"
NOTE:Generally,byturningtheLowSpeedScrew
counterclockwise _ a smallmount, the
• unitwillaccelerateproperly.
:*....... f. REINSTALL AIR RLTER
:: ' :_Thealrflltermustbeflttedintothe
comers of thehousing to avoiddamage tothe
L.. engine..-
: ,.L:/ '! i :._.+' ++
, i"-i' 2:SPARK PLUG
Checksparkplugand replaceas necessary.Setthe
...... :electrodegapat .025".
• r , r ,
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