Operating instructions

REPLACE SPARK PLUG
Replace spark plug each year to ensure
the engine starts easier and runs better.
Set spark plug gap at 0.025 inch. Igni-
tion timing is fixed, nonadjustable.
1. Twist, then pull off spark plug boot.
2. Remove spark plug from cylinder
and discard.
3. Replace with Champion RCJ-7Y
spark plug and tighten with a 3/4
inch socket wrench (10-12 ft/Ibs).
4. Reinstall the spark plug boot.
INSPECT MUFFLER AND SPARK AR-
RESTING SCREEN
_IWARNING: The muffler on this
product contains chemicals known to
the State of California to cause cancer.
_b WARNING: Muffler is very hot
during and after use. Do not touch the
muffler or allow combustible material
such as dry grass or fuel to do so.
As your unit is used, carbon deposits
build up on the muffler and spark ar-
resting screen and must be removed
to avoid creating a fire hazard or af-
fecting engine performance.
For normal homeowner use, the muf-
fler and spark arresting screen will not
require any service. After 50 hours of
use, we recommend that your muffler
be serviced or replaced by your Sears
Service Center.
We recommend all service and adjust-
ments not listed in this manual be per-
formed by your Sears Service Center.
CARBURETOR ADJUSTMENT
Carburetor adjustment is critical and if
done improperly can permanently
damage the engine as well as the car-
buretor. If you require further assis-
tance or are unsure about performing
this procedure, call our customer as-
sistance help line at 1-800-285-5878.
Old fuel, a dirty air filter, a dirty fuel fil-
ter, or flooding may give the impres-
sion of an improperly adjusted carbu-
retor. Check these conditions before
adjusting the carburetor.
The carburetor has been carefully set
at the factory. Adjustments may be
necessary if you notice any of the fol-
lowing conditions:
• Engine will not idle. See LOW SPEED
MIXTURE ADJUSTMENT (L) under ad-
justing procedure.
• Engine dies or hesitates instead of ac-
celerating. See ACCELERATION CHECK
under adjusting procedure.
• Loss of power. See MIXTURE ADJUST-
MENT (L or H) under adjusting proce-
dure.
There are two adjustment screws on
the carburetor. The low speed adjust-
ment screw is marked with the letter L,
and the high speed adjustment screw
is marked with the letter H. The throttle
lever is used to control engine speed.
The throttle lever can be placed in one
of four positions: STOP, IDLE or "J_,
FULLTHROTTLE or _, and one inter-
mittent position.
High Speed Low Speed
Mixture Screw Mixture Screw
with Limiter Cap with Umiter Cap
ADJUSTING PROCEDURE
CAUTION: Do not force plastic limiter
caps on screws beyond the built-in
stops or damage will occur.
Initial Settings
1. Turn both mixture screws (L and H)
counterclockwise until they stop.
2. Start engine, let it run for 3 minutes,
then proceed to adjust screws ac-
cording to the instructions below. If
engine performance at initial settings
is acceptable, no further adjustments
are necessary. If engine does not
start, refer to TROUBLESHOOTING
TABLE. If still unable to remedy situ-
ation, call 1-800-235-5878.
Low Speed Mixture Adjustment - L
1. Allow the engine to idle.
2. Turn low speed mixture screw (L)
slowly clockwise until the speed be-
gins to drop.
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