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Service and adjustments, Iq remove belt guard (see fig. 22), Engine – Poulan 156332 User Manual

Page 16

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SERVICE AND ADJUSTMENTS

IQ REMOVE BELT GUARD (See Fig. 22)

* Remove two (2) cap nuts and washers from side of belt

Loosen (do not remove) tine shield nut oh underside of

tine shield.

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, attitude or

load. If the carburetor does need adjustment, proceed as

follows.

In 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 (dockwise)

closing it finger tight and then turn valve out (counter-
clockwise) 1-1/2 turns.

FINAL SETTING

» Start engine and aliow to warm for five minutes. Make

final adjustments with engine running at idle and tine
control lever in “OFF” position.

» With throttle controtin 'SLOW” position, turn idle needle

valve In (dockwise) until engine begins to die, then turn

out (counterciockwise) until engine runs rough. Turn
valve to a point midway between those two positions.

IDLE RPM ADJUSTMENT

* To adjust Idle RPM, rotate throttle linkage counterclock­

wise and hold against stop while adjusting idle speed

adjusting screw to obtain 1750 RPM. Release throttle
linkage. .

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.

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