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SERVICE AND ADJUSTMENTS
TO ADJUST CHOKE CONTROL (See Fig. 35)
The choke control has been preset at the factory and
adjustmentshould not be necessary. Checkadjustment as
described below before looseningcable. If adjustment is
necessary, proceed as follows:
•
With engine not running, move choke control (located
on dash panel) to full choke position.
•
Remove air cleaner cover, filter and cartridge plate to
expose carburetor choke (see "AIR FILTER" in the
Customer RespOnsibilities section of this manual).
•
Choke should be closed. If it is not, loosen casing
clamp screw and move choke cable until choke is
completely closed. Tighten casing clamp screw se-
curely.
•
Reassemble air cleaner,
CHOKE
CLOSED
'CHOKE
LEVER
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 requiredto compensatefor differences infuel,
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 offuel to the engine givinga leaner fuel/
air mixture. Turning the mixture screw out (counterclock-
wise) 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 SCREW IS
TURNED IN TOO TIGHT.
PRELIMINARY SETTING -
•
Be sure you have a clean air filter, and the throttle
control cable and choke are adjusted properly (see
above).
•
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 runningand shift/motion
control lever in neutral (N) position.
•
With throttlecontrollever in slow position,hold throttle
lever against idle speed screw and adjust idle speed
screw to obtain 1200 to 1400 RPM.
•
While still holding throttle lever against idlespeed
screw, turn idle mixture screw in (clockwise)until
engine begins to die and then turn out (counterclock-
wise) until engine runs rough. Turn screw to a point
midway between those two positions.
•
Continueto hold throttle lever against idle speedscrew
and adjust idle speed screwto obtain 900 to 1200 RPM.
Release throttle lever.
ACCELERATION TEST -
•
Move throttle control lever from slowto 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
accelerates
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.
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 PROPER
EQUIPMENT
AND
EXPERIENCE
TO
MAKE
ANY
NECESSARY
ADJUSTMENTS.
IDLE SPEED
SCREW
IDLE MIXTURE
SCREW
LEVER
FIG. 36
, SPEED
THROTTLE
IDLE MIXTURE
LEVER
SCREW
27
FIG. 37
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