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TO ADJUST CARBURETOR
The carburetorhasbeen presetat thefactory
and adjustment should not be necessary.
However,minor adjustment may be required
to c(_npensate for differences in fuel,
temperature,allJtudeor load. Ifthe carburetor
does need adjustment, proceedas folows:
In general, tuming the adjustingneedlesIn
(dockwLse)decreases the supply of fuel to
the enginegMng a leaner fuel/air mixture.
Tumingthe adjustingneedes out (counter-
clodw_se)increasesthe supplyof fuelto the
engine giving a richer fueVairmixture.
IMPORTANT: Damage to the needlesand
seatsincarburetor may resultifturnedin too
ti_t.
NOTE: The carburetor onthisengineislow
emission, if isequipped with an idlefuel
aclusting needle witha imiter cap, which
alows someadjus'cnantwithinthe limits
alowed bythe cap. Do not attemptto remove
the limitercap.The limitercap cannot be
removed without breaking the a_usting
needle.
1. Besureyou have a clean airfilterand the
throttlecootrolcableis adjustedproperly
(seeabove).
2. Start engine and alow to warm for five
minutes. Make adjustments with engine
running and shiftttoolJoncontrol lever in
neutral(N) pesi_on.
3. Idlest_=edsetting. Withthrottle control
lever in slow pos_on, engineshould kJe
at 1750 RPM. Ifengine idlestoo s!owor
fast, tum idle speed adjusting screw in or
out antJlcorrect idle is attained.
4. Idlefuelneedle set,rig- Withl_ret'_
contrelleverinslowposi_on,turnide fuel
a_ustmant needle In (clockwise)an_l
engine beginsto ole and than tum out
(_terdeskwise) untilengine rune
rough.Tum needleto a pointmidway
between those two pesiitons.
5. Resheck idlespeed. Reac_ustif neces-
sary.
ACCELERATIONTEST-
6. MovethrctlJecontrolleverfrom slowto
fast position.Ifengine hesitatesordins,
rum idlefuel ac_ustingneedle out
(counterclockwise)1/8 turn.Repeattest
andcoo'_nneto adjust, ifnecessary,an_JI
engineaccaieretessmoothly.
High speed stop is factory adjusted. Do
notadjust ° damage may result.
IMPORTANT: Never tamper withthe
engine governor, which is factory set for
proper engine speed. Overepeeding the
engine above the factory high speed
setting can bedangerous. Ifyou thinkthe
engine-governed high speed needs
adjusting, contacta Sears or other
qualified service center, which has proper
equipment and expedence to make any
necessary adjustments.
IdleSpeed
Adjusting
Screw
IdleFuel
Adjustin
Needle
28
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