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01915
ENGINE
Maintenance, re pair, or re place ment of the
emission con trol de vic es and sys tems, which
are be ing done at the cus tom ers expense,
may be performed by any non-road engine
repair es tab lish ment or individual. Warranty
repairs must be performed by an authorized
engine man u fac tur er's service outlet.
TO AD JUST THROTTLE CON TROL
CABLE
The throttle control has been preset at the
factory and ad just ment should not be nec-
essary. Check adjustment as de scribed
below before loosening cable. If adjust-
ment is necessary, proceed as follows:
1. With engine not running, move throt tle
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 se cure ly.
01041
Governor Control Lever
Clamp Screw
Throttle
Cable
Holes
"A"
Governor Control Plate
TO AD JUST CARBURETOR
NOTE: The carburetor on this engine is
low emission. It is equipped with an idle
fuel adjusting needle with a limiter cap,
which allows some adjustment within the
limits al lowed 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 ad just ment should not be
necessary. However, minor ad just ment
may be required to compensate for dif fer -
enc es in fuel, tem per a ture, altitude or load.
If the carburetor does need ad just ment,
proceed as follows:
In general, turning idle mixture valve in
(clock wise) de creases the supply of fuel to
the engine giving a leaner fuel/air mix-
ture. Turning the idle mixture valve out
(counter clock wise) in creases the sup ply
of fuel to the engine giving a richer fuel/air
mixture.
Throttle
Lever
Idle Speed
Screw
Idle Mixture
Valve with
Limiter
IMPORTANT: Damage to the needle
valve and the seat in carburetor may result
if screw is turned in too tight.
PRELIMINARY SETTING -
1. Air cleaner assembly must be as sem -
bled to the car bu re tor when making
carburetor adjustments.
2. Be sure the throttle control cable is
adjusted properly (see above).
FINAL SETTING -(See “TO ADJUST
THROTTLE CONTROL CABLE” in this
section of the manual.)
1. Start engine and allow to warm for fi ve
minutes. Make fi nal ad just ments with
engine running and shift/motion
control
lever in neutral (N) position.
2. Move throttle control lever to slow posi-
tion. With fi nger, rotate and hold throttle
lever against idle speed screw. Turn
idle speed screw to attain 1750 RPM.
3. While still holding throttle lever against
idle speed screw, turn idle mix ture
valve full travel clockwise then coun ter -
clock wise until engine runs rough. Turn
valve to a point midway be tween those
two po si tions. Re lease throt tle lever.
ACCELERATION TEST -
4. Move throttle control lever from slow
to fast po si tion. If engine hesitates or
dies, turn idle mixture valve out (coun-
ter clock wise) 1/8 turn. Repeat test and
continue to adjust, if nec es sary, until
engine ac cel er ates smooth ly.
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. Overspeeding
the engine above the factory high speed
setting can be dangerous. If you think the
engine-governed high speed needs adjust-
ing, contact a Sears or other qualifi ed ser-
vice center, which has proper equip ment
and experience to make any nec es sary
ad just ments.