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ii i i
SERVICE AND ADJUSTMENTS
I
ENGINE
TO ADJUST THRO'n'LE CONTROL CABLE
(See Fig. 26)
The throttle control has been preset at the factory and
adjustment shouldnot be necessary. Chock adjustment as
described below before loosening cable. If adjustment is
necessary, proceed as follows:
• With engine not running, move throttle control lever
from slow to choke position. Slowly move lever from
choke to fast position.
• Checkthatholes'A" lngovemorcontrolleverandhole
in governor plate line-up. If holes "A"are not aligned,
loosenclamp screw and move throttlecable untilholes
are aligned. Tighten clamp screw securely.
GOVERNOR
CONTROL PLATE
GOVERNOR
CONTROL LEVER
\
HOLES"A" CLAMP THROTTLE
SCREW CABLE
FIG. 26)
TO ADJUST CARBURETOR (See Fig. 27)
NOTE: The carburetor on this engine is lowemission. Itis
equipped with an idle fuel adjusting needle with a limiter
cap, which allows some adjustment within the limits al-
lowedbythe cap. Do notattempt to remove the limitercap.
The limiter cap cannot be removed without breaking the
adjusting needle.
The carburetor has been preset at the factory and adjust-
ment should not be necessary. However, minor adjust-
ment may be required to compensate fordifferences in fuel,
temperature, altitude or load. If the carburetor does need
adjustment, proceed as follows:
In general, turning idle mixture valve in (clockwise) de-
creases the supply of fuel to the engine giving a leaner fuel/
air mixture. Turning the idle mixture valve out (counter-
clockwise) increases the supply of fuel to the engine giving
a richer fuel/air mixture.
IMPORTANT: DAMAGE TO THE NEEDLE VALVE AND
THE SEAT IN CARBURETOR MAY RESULT IF SCREW IS
TURNED IN TOO TIGHT.
PRELIMINARY SETI'ING
Air cleaner assembly mustbe assembled tothe carbu-
retorwhen making carburetor adjustments.
Be sure the throttle control cable is adjusted properly
(see above).
FINAL SE-I-FING
• Startengineandallowtowarmforfiveminutes. Make
final adjustments with engine running and shift/motion
control lever in neutral (N) position.
• Move throttle controllever to slowposition. With finger,
rotate and hold throttle lever against idle speed screw.
Turn idle speed screw to attain 1750 RPM.
• While still holding throttle lever against idle speed
screw, turn idle mixture valve full travel clockwisethen
counterclockwise untilengine runsrough. Turn valve
to a point midway between those two positions. Re-
lease throttle lever.
ACCELERATION TEST
• Move throttle controllever from slow to fast position. If
engine hesitates or dies, turn idle mixture valve out
(counterclockwisa) l/Stum. 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
SCR,W -- [ ggLE
IDLEM_IXTU RE__
VALVE WITH _
LIMITER
FIG. 27
22
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