Owner`s manual

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AND ADJUSTMENTS
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ENGINE ........
TO ADJUST THROTrLE CONTROL CABLE
(See Fig. 27)
• Loosen cable clamp screw to allow cable to move.
° Move throttle control lever on upper handleto "FAST"
position.
- Pull throttlecable out untilengine bellcrank isback as
far as it willgo.
° Hold cable in this position and tighten clamp screw
securely.
CLAMPSCREW _ :
THROTTLE
CABLE
BELLCRANK
FIG. 27
TO ADJUST CARBURETOR (See Fig. 28)
The carburetor has a high speed jet and has been presetat
the factory and adjustment should not be necessary. How-
ever, minor adjustments 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 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 SE'n'iNG
• Air cleaner assembly mustbe assembled to the carbu-
retor when making carburetor adjustments.
• Be sure the throttle control cable is adjusted properly
(see above).
• With engine off, turn idle needle valve in (clockwise)
closing it finger tight and then turn valve out (counter-
clockwise) 1-1/2 turns.
FINAL SETTING
• Start engine and allow to warmfor five minutes. Make
final adjustments with engine running at idleand drive
control bar in 'I_ISENGAGED" positmon.
° With throttle controllever in =SLOW" position, turn idle
needle valve in (clockwise) until engine begins to die
then turn out (counterclockwise) until engine runs
rough. Turn valve to a point midway between those two
positions.
IDLE RPM ADJUSTMENT
• To adjust idle RPM, rotate throttle linkage counter-
clockwiseand hold against stop while adjusting idle
speed adjustingscrewto obtain 1750 RPM. Release
throttlelinkage.
ACCELERATION TEST
,, Move throttle control lever from "SLOW" to "FAST"
position,if engine hesitatesor dies, turnneedle valve
out (counterclockwise) 1/8 turn. Repeat test and
continueto adjust, ifnecessary, 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. OVERSPEED[NG THE ENGINE ABOVE
THE FACTORY HIGH SPEED SETTING CAN BE
DANGEROUS. IF YOUTHINK THE ENGINE-GOVERNED
HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEAREST SEARS SERVICE CENTER, WHICH HAS
PROPEREQUIPMENT AND EXPERIENCE TO MAKEANY
NECESSARY ADJUSTMENTS.
THROTTLE UNKAGE
THROTTLE STOP
IDLE SPEED
ADJUSTING SCREW IDLE NEEDLE VALVE
FIG. 28
18