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| SERVICE | AND ADJUSTMENTS |
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TO ADJUST CHOKE CONTROL (See Fig. 35)
The choke control has been preset at the factory and adjustment should not be necessary. Checkadjustmentas described below before loosening cable, If adjustment is necessary, proceed as follows:
-With engine not running, move choke control (located on dash panel) to full choke (N) position,
o Remove air cleaner cover, filter and cartridge plate to
expose carburetor choke (see "AIR FILTER" in the Customer Responsibilities section of this manual),
o 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_
o Reassemble air cleaner.
CHOKE
CLOSED
LEVER
CLAMP
SCREW
•With throttle control lever 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 idle speed screw, turn idle mixture screw in (clockwise) until engine begins to die and then turn out (counterc!ock- wise) until engine runs rough_ Turn screw to a point midway between those two positions..
. Continuetoholdthrottleleveragainstidlespeedscrew
and adjust idle speed screwto obtain 900 to 1200 RPM Release throttle lever.
ACCELERATION TEST -
oMove 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
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
FIG. 35
TO ADJUST CARBURETOR (See Figs. 36 & 37)
The carburetor has been preset at the factory and | adjust- |
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ment | should | not | be necessary | However, minor | adjust- |
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ment may be required to compensate for differences in fuel, |
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temperature, | altitude | or load. | If the carburetor does need |
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adjustment, | proceed | as follows: |
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In general, turning the mixture screw in (clockwise) de- |
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creases the supply of l'ueito the engine giving a leaner fuel/ |
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air mixture. Turning the mixture screw out (counterclock- | FIG. 36 | ||||||
wise) | increases | the supply of fuel to the engine | giving a | ||||
richer | fueltair | mixture. |
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IMPORTANT: DAMAGE TO THE NEEDLES AND THE
SEATS IN CARBURETOR MAY RESULT IF SCREW IS
TURNED tN TOO TIGHT
IDLE MIXTURE SCREW
THROTTLE
LEVER
PRELIMINARY SETTING -
oBe sure you have a clean air filter, and the throttle control cable and choke are adjusted properly (see above).
oWith engine off turn idle mixture screw in (clockwise) closing it finger tight and then turn out (counterclock- wise)
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°
IDLE SPEED
SCREW
THROTTLE | f | IDLE MIXTURE |
LEVER |
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| SCREW | |
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27 |
| FIG. 37 |