Poulan 157257 - Manual (Page 23)

^LRvitF
ENGINE
TO ADJUST THROTTLE CONTROL iBLE
Th© throtti
,r J I iGn ( - ,
been preset at the
■necessary. Check a«
tory and
tmentas
e.f
ontrol
I [|f:
aw before loosening cable, if adjustment is
neret' im i. y m d l 'olio vS
‘ b'lh rum r o i r u n n i i ' "/< tl n I ' ° c o ui< h lovnr
hoi 1 ( a (>^) t(i rhof - { |) t n It ( I ' Ic wh' rro'/t
mw I rri choke (h ) ' C ' f a J poGiticn
• Check that holes “A" in governor control lever and hole
in governor plate line-up. If holes '‘A" are not aligned,
loosen damp screw and move throttle cable until holes
are aligned. Tighten clamp screw securely.
GOVERNOR
CONTROL LEVER
GOVERNOR
CONTROL PLATE
FIG. 32
TO ADJUST CARBURETOR (See Fig. 33
)
The carburetor has been preset at the factory and adjust­
ment should not be necessary. However, minor adjust­
ment may be required to compensate fordifferences in fuel,
temperature, altitude or load. If the carburetor does need
adjustment, proceed as follows:
In general, turning idle mixture valve in (clockwise) de­
creases the supply of fuel to the engine giving a leaner tueh
air mixture. Turning the idle mixture valve out (counter­
clockwise) increases the supply of fuel to the engine giving
a richer fuel/air mixture.
IMPORTANT: DAMAGE TO THE NEEDLE VALVE AND
THE SEAT IN CARBURETOR MAY RESULT IF SCREW IS
TURNED IN TOO TIGHT,
PRELIMINARY SETTING -
• Air Cleaner assembly must be assembled to the carbu­
retor when making carburetor adjustments.
• Be sure the throttle control cable is adjusted properly
(see above),
• With engine off turn idle mixture valve in (clockwise)
closing it finger tight and then turn out icounterdock-
vvise) 1 full turn.
■¡en turn out
, , . - K
to ¡vunf midway
... ..'ttie lever.
• W
I
' U I ) li ifi M •df
screw, turn idle mixtiite valve in
gme begins to die ano
until engine runs rough. Turn
between those two positions,
ACCELERATION TEST -
• Move throttle control lever fr
position, if engine hesitates
valve out (counterciockwisej
continue to adjust, if necess
ates smoothly.
High speed stop is factory adjusted. Do not adjust -
damage may result.
IMPORTANT; NEVER TAMF’ER WITH THE ENGINE
GOVERNOR, YfHICH IS FACTORY SET FOR PROPER
ENGINE SPEED, OVERSPEEDING THE ENGINE ABOVE
THE FACTORY HIGH SPEED SETTING CAN BE
DANGEROUS. IF YOU THINK THE ENGINE-GOVERNED
HIGH
SPEED NEEDS ADJUSTING, CONTACT YOUR
N E A R E S T A U T H O R I Z E D S E R V I C E R E N T E R /
DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND
E X P E R I E N C E TO M A K E A N Y N E C E S S A R Y
ADJUSTMENTS,
THROTTLE
LEVER
IDLE SPEED
SCREW
IDLE MIXTURE
VALVE
FIG. 33
23