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ENGINE
Maintenance,repair,orreplacementofthe
emissioncontroldevicesandsystems,which
arebeingdoneatthecustomersexpense,
may be performedbyany non-roadengine
repairestablishmentor individual.Warranty
repairsmust be performedby an authorized
engine manufacturer'sserviceoutlet.
TO ADJUSTTHROTTLE CONTROL
CABLE
The throttle control has been preset at the
factory and adjustment should not be nec-
essary. Check adjustment as described
below before loosening cable. If adjust-
ment is necessary, proceed as follows:
1. With engine not running, move throttle
control lever from slow to choke posi-
tion. Slowly move lever from choke to
fast position.
2. Check that holes "A" in governor
control lever and hole in governor plate
line-up. If holes "A" are not aligned,
loosen clamp screw and move throttle
cable until holes are aligned. Tighten
clamp screw securely.
Governor Control Lever Governor Control Plate
"A" Clamp Screw Cable
TO ADJUST CARBURETOR
NOTE: The carburetor on this engine is
low emission. It isequipped with an idle
fuel adjusting needle with a limiter cap,
which allows some adjustment within the
limitsallowed by the cap. Do not attempt
to remove the limiter cap. The limiter cap
cannot be removed without breaking the
adjusting needle.
The carburetor has been preset at the
factory and adjustment should not be
necessary. However, minor adjustment
may be required to compensate for differ-
ences in fuel, temperature, altitude or load.
If the carburetor does need adjustment,
proceed as follows:
In general, turning idle mixture valve In
(clockwise) decreases the supply of fuel to
the engine giving a leaner fuel/air mix-
ture. Turning the idle mixture valve out
(counterclockwise) 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
ifscrew is turned in too tight.
PRELIMINARY SETTING -
1. Air cleaner assembly must be assem-
bled to the carburetor when making
carburetor adjustments.
2. Be sure the throttlecontrol cable is
adjusted properly (see above).
FINAL SE'I-rlNG -(See 'q'O ADJUST
THROTTLE CONTROL CABLE" in this
section of the manual.)
1. Start engine and allow to warm for five
minutes. Make final adjustments with
engine running and shift/motion control
lever in neutral (N) position.
2. Move throttle control leverto slow posi-
tion.With finger, rotate and holdthrottle
lever against idle speed screw. Turn
idlespeed screw to attain 1750 RPM.
3. While still holdingthrottle lever against
idlespeed screw, turn idle mixture
valve full travel clockwise then coun-
temlockwise untilengine runs rough.
Turn valve to a point midway between
those two positions. Release throttle
lever.
ACCELERATION TEST -
4. Move throttle control leverfrom slow
to fast position. If engine hesitates or
dies, turn idle mixturevalve out (coun-
temlockwise) 1/8 turn. Repeat test and
continue to adjust, ifnecessary, until
engine accelerates smoothly.
High speed stop is factory adjusted. Do
not adjust or damage may result.
IMPORTANT: Never tamper with the
engine governor, which isfactory set
for proper engine speed. Overspeed-
ing the engine above the factory high
speed setting can be dangerous. If you
think the engine-governed high speed
needs adjusting, contact a Sears or other
qualified service center, which has proper
equipment and experience to make any
necessary adjustments.
Idle Speed
Lever
Idle Mixture
Valve with
Limiter
28
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