Poulan CHDF550B - Manual (Page 16)

A N P A D J U & T M E - N T S
TO ^il MO'‘l H f . f i H 4 0 | ! . I i . 2 2 |
* f I I'• I/' ( ) ' i.L ‘ ric *■ I 1 r , i^iHeofbelt
ri) r n
* fside of
line sriieia.
* Pull belt guard out and away from unit.
* Replace belt guard by reversing above procedure. Be
sure slot in bottom of belt guard is under head of tine
shield bolt and all nuts are tightened securely.
ENGINE
TO ADJUST CARBURETOR (See Fig. 23)
The carburetor has a high speed fixed jet and has been
preset at the factory and adjustment should not be neces­
sary. However, minor adjustments may be required to
compensate for differences in fuel, temperature, altitude or
load. If the carburetor does need adjustment, proceed as
follows.
I r general, turning the idle needle valve in (clockwise)
decreases the supply of fuel to the engine giving a leaner
fuel/air mixture. Turning the needle valve out (counter­
clockwise) increases the supply of fuel to the engine giving
a richer fuel/air mixture,
IMPORTANT: DAMAGE TO THE NEEDLES AND THE
SEATS IN CARBURETOR MAY RESULT IF SCREWS ARE
TURNED IN TOO TIGHT.
PRELIMINARY SETTING
• Air cleaner assembly must be assembled to the carbu­
retor when making carburetor adjustments.
• With engine off, turn idle needle valve in (clockwise)
closing it finger tight and then turn valve out (counter­
clockwise) 1-1/2 turns.
FINAL SETTING
• Start engine and allow to warm for five minutes. Make
final adjustments with engine running at idle and tine
control lever in “OFF” position.
' i/'b'.if'K hi >
1
.
1
' . , < r ’ ,l >P' t)'i 14' h f
valve in (clockwise) until engine begins to die, then turn
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/ ;
0
-
1
, - p , I r , i t o h f
1
^ i V O f i i i K
4
.
SDLI h PM
i I 1 1 I . I ' P f < ! r i i j _ f K r m i i r I - < - 1 m > l i '
1 , 1 : \ J i i ' , 1 a i 4 ' ! j \ . . i i i . j n . H i - p t o
adiusi.nq Cv 'ibidi; l / b O R P M П е к r - - = diri.ttie
linl
3 “.
ACCELERATION TEST
• Move throttle control lever from “SLOW” to “FAST”
position. If engine hesitates or dies, turn idle needle
valve out (counterclockwise) 1 /8 turn. Repeat test and
continue to adjust, if necessary, until engine acceler­
ates smoothly.
High speed stop is factory adjusted. Do not adjust or
damage may result.
IMPORTANT: NEVER TAMPER WITH THE ENGINE
GOVERNOR, WHICH 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
NEAREST
AUTHORIZED SERVICE CENTER/
DEPARTMENT, WHICH HAS THE PROPER EQUIPMENT
AND
EXPERIENCE TO MAKE ANY NECESSARY
ADJUSTMENTS,
16