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SERVICE AND ADJUSTMENTS
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UJUlLL J
TO ADJUST
CHOKE
CONTROL
(See Fig. 35)
•
With throttle control lever in slow (*_,) position, hold
throttle lever against idle speed screw and adjust idle
The choke control has been preset at the factory and
adjustment should not be necessary. Checkadjustmentas
speed screw to obtain 1200 to 1400 RPM
described below before loosening cable, If adjustment is
.
While still holding throttle lever against idle speed
necessary, proceed as follows:
screw, turn idle mixture screw in (clockwise)
until
-
With engine not running, move choke control (located
engine begins to die and then turn out (counterc!ock-
on dash panel) to full choke (N) position,
wise) until engine runs rough_ Turn screw to a point
o
Remove air cleaner cover, filter and cartridge plate to
midway between those two positions..
expose carburetor choke (see "AIR FILTER" in the
.
Continuetoholdthrottleleveragainstidlespeedscrew
Customer Responsibilities
section of this manual),
and adjust idle speed screwto obtain 900 to 1200 RPM
o
Choke should be closed. If it is not, loosen casing
Release throttle lever.
clamp screw and move choke cable until choke is
completely closed_ Tighten casing clamp screw se-
curely_
o
Reassemble air cleaner.
CHOKE
CLOSED
LEVER
CLAMP
SCREW
FIG. 35
TO ADJUST
CARBURETOR
(See Figs. 36 &
37)
The carburetor has been preset at the factory and adjust-
ment should not be necessary
However, minor adjust-
ment may be required to compensate for differences in fuel,
temperature, altitude or load. If the carburetor does need
adjustment, proceed as follows:
In general, turning the mixture screw in (clockwise)
de-
creases the supply of l'uei to the engine giving a leaner fuel/
air mixture. Turning the mixture screw out (counterclock-
wise) increases the supply of fuel to the engine giving a
richer fueltair mixture.
IMPORTANT:
DAMAGE TO THE NEEDLES AND THE
SEATS IN CARBURETOR
MAY RESULT IF SCREW IS
TURNED tN TOO TIGHT
PRELIMINARY
SETTING -
o
Be sure you have a clean air filter, and the throttle
control cable and choke are adjusted properly (see
above).
o
With engine off turn idle mixture screw in (clockwise)
closing it finger tight and then turn out (counterclock-
wise) 1-1/4 to 1-1/2 turns.
FINAL SETTING -
°
Start engine and allow to warm for five minutes. Make
final adjustments with engine running and shift! motion
control lever in neutral (N) position°
ACCELERATION
TEST -
o
Move throttle
control
lever from slow (=_)
to fast (,_)
position,
If engine
hesitates
or dies, turn idle mixture
screw
out
(counterclockwise)
1/8 turn,
Repeat
test
and continue
to adjust, if necessary,
until engine accel-
erates
smoothly_
High
speed
stop
is factory
adjusted,
Do not adjust
-
damage
may result
IMPORTANT:
NEVER
TAMPER
WITH
THE
ENGINE
GOVERNOR,
WHICH
IS FACTORY
SET FOR PROPER
ENGINE SPEED
OVERSPEEDINGTHEENGINEABOVE
THE
FACTORY
HIGH
SPEED
SETTING
CAN
BE
DANGEROUS
tF YOU THINK THE ENGINE-GOVERNED
HIGH
SPEED
NEEDS
ADJUSTING,
CONTACT
YOUR
NEAREST
AUTHORIZED
SERVICE
CENTER/
DEPARTMENT,
WHICH
HAS PROPER
EQUIPMENT
AND
EXPERIENCE
TO
MAKE
ANY
NECESSARY
ADJUSTMENTS
IDLE SPEED
SCREW
IDLE MIXTURE
SCREW
THROTTLE
LEVER
FIG. 36
IDLE SPEED
SCREW
THROTTLE f
LEVER
IDLE MIXTURE
SCREW
27
FIG. 37
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